Cumulus Linux 4.3 Release Notes

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4.3.0 Release Notes

Open issues in 4.3.0

Issue IDDescriptionAffectsFixed
CM-33240
On the on the Mellanox SN2410 switch, when you restart switchd or reboot the system, you see the following error messages:
[ 1446.599850] switch 2-0048: HW semaphore is not released
[ 1446.605828] switch 2-0048: Cmd exec failed (opcode=40(ACCESS_REG),opcode_mod=0,in_mod=0,status=30(BAD_PKT))
[ 1446.616378] switch 2-0048: Reg cmd access failed (reg_id=9002(mfsc),type=write)
[ 1446.624365] switch 2-0048: Failed to write PWM duty
This is a cosmetic issue and does not affect operation of the switch.
4.3.0
CM-33167
On the Mellanox SN4700 switch, if you use the CREDO CABLE with a 4x100 configuration, the system experiences issues accessing the ASIC Thermal sensors.4.3.0
CM-32516
When using NCLU to add new BGP neighbors to existing configurations, the existence of address-family statements are ignored and the neighbors are added at the end of these lines. This might cause a problem if you try to activate these new neighbors in any of the existing address-family configurations.
To work around this issue, configure the new BGP neighbors with vtysh.
3.7.14-3.7.14.2, 4.2.1-4.3.0
CM-32055
During a graceful restart of a peer router, if the link between the local system (Helper) and the restarting router flaps, the stale routes announced by the restarting router are no longer used for forwarding by the Helper router even though they remain in the BGP RIB.4.3.0
CM-28249
On the Mellanox switch, when you modify the buffer and queue configuration without restarting switchd, you might see a one second interruption in forwarding.4.0.0-4.3.0
CM-28080
TACACS+ through ClearPass is not currently supported. Cumulus Linux sends authorization before authentication, but ClearPass does not accept an authorization before the user is authenticated.3.7.11-3.7.14.2, 4.0.0-4.3.0
CM-21678
On a Dell switch with a Maverick ASIC, NetQ might receive false alerts like the following via PagerDuty:

 
cumulus@switch:~$ netq show sensors temp changes | grep absent | grep -v psu
P2Leaf01 temp9 networking asic die temp sensor absent 43 105 100 5 Unable to find driver path: /cumulu Add 7d:22h:1m:41s
P2Leaf01 temp6 networking asic die temp sensor absent 45 105 100 5 Unable to find driver path: /cumulu Add 7d:22h:1m:41s
P2Leaf01 temp6 networking asic die temp sensor absent 47 105 100 5 Unable to read temp4_highest Add 9d:23h:26m:6s
P2Leaf01 temp6 networking asic die temp sensor absent 45 105 100 5 Unable to read temp4_highest Add 14d:22h:46m:45s

This message might occur as a result of a timeout at the hardware level, or the switch might be reporting a failure to get a response.
3.5.3-3.7.14.2, 4.0.0-4.3.0
CM-20508
The Cumulus-Resource-Query-MIB defines the ability to gather buffer utilization status but when these objects are polled, they return nothing.3.5.3-3.7.14.2, 4.0.0-4.3.0
CM-20033
The VLAN interface stays up even though the physical link carrying the VLAN is admin or carrier down
3.5.2-3.7.14.2, 4.0.0-4.3.0
CM-15812
Multicast forwarding fails for IP addresses whose DMAC overlaps with reserved DIPs.3.2.1-3.7.14.2, 4.0.0-4.3.0
2690100
When you run the vtysh show ip bgp vrf statistics command, the bgpd service crashes if you use vrf all. For example:spine01# show ip bgp vrf all statistics
vtysh: error reading from bgpd: Success (0)Warning: closing connection to bgpd because of an I/O error!
spine01# show bgp vrf all ipv6 unicast statistics vtysh: error reading from bgpd: Success (0)Warning: closing connection to bgpd because of an I/O error!
To workaround this issue, run the command against each VRF independently.
3.7.15, 4.0.0-4.3.0
2687160
CVE-2018-25009 CVE-2018-25010 CVE-2018-25011 CVE-2018-25013 CVE-2018-25014 CVE-2020-36328 CVE-2020-36329 CVE-2020-36330 CVE-2020-36331 CVE-2020-36332: Multiple vulnerabilities were discovered in libwebp, the implementation of the WebP image format, which could result in denial of service, memory disclosure or potentially the execution of arbitrary code if malformed images are processed
Vulnerable: 0.6.1-2Fixed: 0.6.1-2+deb10u1
4.0.0-4.3.0
2685584
A host migrated to an 802.1x port within the same broadcast domain does not have the correct static FDB entry installed if a dynamic FDB entry for that MAC address exists from previous connectivity in the broadcast domain.4.2.1-4.3.0
2684418
If you configure items in a VRF that has been created, deleted, then re-created, staticd crashes.4.3.0
2682976
CVE-2021-28902, CVE-2021-28903, CVE-2021-28904, CVE-2021-28905, CVE-2021-28906: Several vulnerabilities have been announced in libyang that can cause a crash
Vulnerable: <= 1.0.184-2+cl4.3.0u1
4.0.0-4.3.0
2682973
CVE-2020-12762: integer overflow in the json-c JSON library, which could result in denial of service or potentially the execution of arbitrary code if large malformed JSON files are processed
Vulnerable: 0.12.2+cl4u1
4.0.0-4.3.0
2682780
Adding a route map configuration after a MAC access list configuration line causes the route map configuration to be applied incorrectly
To work around this issue, add the MAC access list configuration to the end of the /etc/frr/frr.conf file.
4.2.0-4.3.0
2679950
CVE-2021-25217: parsing of stored leases by dhclient or dhcpd has an incorrect length check that may cause a crash
Vulnerable: <= 4.3.1-6-cl3.7.14u1Fixed: 4.3.1-6-cl3.7.16u1
3.7.0-3.7.15, 4.0.0-4.3.0
2677049
CM-33247
CVE-2020-25681 CVE-2020-25682 CVE-2020-25683 CVE-2020-25684 CVE-2020-25685 CVE-2020-25686 CVE-2020-25687: Several vulnerabilities in dnsmasq, a small caching DNS proxy and DHCP/TFTP server, could result in denial of service, cache poisoning or the execution of arbitrary code.4.0.0-4.3.0
2671668
CVE-2021-23017: off-by-one in Nginx, a high-performance web and reverse proxy server, which couldresult in denial of service and potentially the execution of arbitrary code
Vulnerable: <= 1.14.2-2+deb10u3Fixed: 1.14.2-2+deb10u4
4.0.0-4.3.0
2671381
Remote MAC addreses in zebra are out of sync with bgpd
The zebra MAC addresses point to an incorrect (old) VTEP IP address and the sequence number is one higher than in BGP.
4.3.0
2669863
CM-28489
The following CVEs were announced for rsyslog:
CVE-2019-17041 CVE-2019-17042

rsyslogd, when receiving remote log messages (not enabled by default on Cumulus Linux) with the pmaisforwardedfrom or pmcisconames optional log parsers (also not enabled by default on Cumulus Linux), is vulnerable to CVE-2019-17041 and CVE-2019-17042 where malicious messages that appear to be from AIX or Cisco respectively may be caused to skip sanity checks, resulting in incorrect negative lengths causing heap overflows.
Vulnerable: 8.1901.0-1

Recommendation:

Do not enable receiving syslog messages from other hosts by the network (with $UDPServerRun or $InputTCPServerRun). Also, do not enable (with $ModLoad) the vulnerable parsers pmaixforwardedfrom or pmcisconames. The default /etc/rsyslog.conf file on Cumulus Linux does not enable any of these.
4.0.0-4.3.0
2669858
CM-32169
OpenSSH is vulnerable to CVE-2020-14145, as described in https://www.fzi.de/fileadmin/user_upload/2020-06-26-FSA-2020-2.pdf.
This is an information leak in algorithm negotiation that can allow man-in-the-middle attacks on initial connection attempts without a previously stored server host key on the client. If desired, mitigation using UpdateHostKeys and HostKeyAlgorithms is also given in that paper.
3.7.14-3.7.15, 4.0.0-4.3.0
2669854
CM-27642
The following CVEs were announced that affect the libssh package:
CVE-2019-14889 has been announced in the libssh library, where unsanitized user-provided scp command lines could allow an attacker to execute arbitrary commands on the server.
The libssh library is not installed on Cumulus Linux by default, but is available in the Cumulus Linux 4 repository for optional installation. Note that libssh is distinct from libssh2 and openssh, which are present on the switches and in the repositories.
See the following for more information:
https://www.libssh.org/security/advisories/CVE-2019-14889.txt
https://security-tracker.debian.org/tracker/CVE-2019-14889
4.0.0-4.3.0
2669073
On Spectrum, Spectrum-2, and Spectrum-3 switches, the l1-show command shows the wrong data when the MST service is stopped
To work around this issue, start the MST service with the sudo mst start command.
4.3.0
2668483
If you update the MAC address of an SVI using ifreload and hwaddress, the kernel maintains a stale permanent fdb entry for the old MAC address.3.7.14-3.7.15, 4.3.0
2666839
CVE-2021-31535: missing length validation in various functions provided by libx11, the X11 client-side library, allow to inject X11 protocol commands on X clients, leading to authentication bypass, denial of service or potentially the execution of arbitrary code
Vulnerable: <= 1.6.7-1+deb10u1Fixed: 1.6.7-1+deb10u2
4.0.0-4.3.0
2663480
CVE-2021-3520: integer overflow flaw in lz4, a fast LZ compression algorithm library, resulting in memory corruption
Vulnerable: 1.8.3-1Fixed: 1.8.3-1+deb10u1
4.0.0-4.3.0
2656530
CVE-2020-18032: A buffer overflow was discovered in Graphviz, which could potentially result in the execution of arbitrary code when processing a malformed file
Vulnerable: 2.40.1-6Fixed: 2.40.1-6+deb10u1
4.0.0-4.3.0
2654715
The cl-acltool takes a significant amount of time to run, which can slow down automation scripts.4.2.0-4.3.0
2653493
After running the systemctl restart networking service command on the MLAG primary switch, the secondary switch also closes its ports
To work around this issue, run the ifreload -a command to restart networking.
4.2.1-4.3.0
2648587
CM-29978
The received PVST BPDU for a VLAN is flooded even though the ingress port doesn’t have the VLAN tagged.3.7.8-3.7.14.2, 4.0.0-4.3.03.7.15
2644054
The following vulnerabilities have been announced in BIND:CVE-2021-25214: a malformed incoming IXFR transfer could trigger an assertion failure in named, resulting in denial of service
CVE-2021-25215: named could crash when a DNAME record placed in the ANSWER section during DNAME chasing turned out to be the final answer to a client query
CVE-2021-25216: the SPNEGO implementation used by BIND is prone to a buffer overflow vulnerability. This update switches to use the SPNEGO implementation from the Kerberos libraries
Vulnerable: <= 9.11.5.P4+dfsg-5.1+deb10u4Fixed: 9.11.5.P4+dfsg-5.1+deb10u5
4.0.0-4.3.0
2639303
When you use NCLU to delete a bond, then add an interface, NCLU reports an error similar to the following:ERROR: ‘NoneType’ object has no attribute ‘conf_key_value_multiple_values’See /var/log/netd.log for more details.4.3.0
2638106
The NCLU net show route vrf summary and vtysh show ip route vrf summary commands don’t return any output.4.3.0
2633062
The following vulnerability affects the libgstreamer-plugins-base1.0-0 package. There is no CVE yet; the Debian advisory number is DSA-4903-1
Multiple vulnerabilities were discovered in plugins for the GStreamer media framework, which may result in denial of service or potentially the execution of arbitrary code if a malformed media file is opened
Vulnerable: 1.14.4-2Fixed: 1.14.4-2+deb10u1
4.0.0-4.3.0
2632379
When you upgrade the switch with apt-get upgrade, the kexec-tools package is not installed, which causes the Smart System Manager fast restart mode to work incorrectly.4.3.0
2628515
CVE-2020-12695: hostapd does not properly handle UPnP subscribe messages under certain conditions, allowing an attacker to cause a denial of service
Vulnerable: <= 2.8.0-cl3.7.15u2Fixed: 2.8.0-cl3.7.15u3
3.7.14-3.7.14.2, 4.3.03.7.15
2618227
The NCLU net show bridge macs command displays permanent MAC addresses for trunked VLANs.4.3.0
2617001
CVE-2021-26933 CVE-2021-27379Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, privilege escalation or memory disclosure
Vulnerable: < 4.11.4+99-g8bce4698f6-1Fixed: 4.11.4+99-g8bce4698f6-1
4.0.0-4.3.0
2616999
CVE-2021-23358: missing input sanitising in the template() function of the Underscore JavaScript library could result in the execution of arbitrary code
Vulnerable: 1.9.1~dfsg-1Fixed: 1.9.1~dfsg-1+deb10u1
4.0.0-4.3.0
2616988
CVE-2020-6851 CVE-2020-8112 CVE-2020-15389 CVE-2020-27814 CVE-2020-27823 CVE-2020-27824 CVE-2020-27841 CVE-2020-27842 CVE-2020-27843 CVE-2020-27845: Multiple vulnerabilities have been discovered in openjpeg2, the open-source JPEG 2000 codec, which could result in denial of service or the execution of arbitrary code when opening a malformed image
Vulnerable: <= 2.3.0-2+deb10u1Fixed: 2.3.0-2+deb10u2
4.0.0-4.3.0
2616977
Multiple vulnerabilities were discovered in cURL, an URL transfer library:CVE-2020-8169: partial password leak to DNS servers
CVE-2020-8177: malicious server could cause curl -J -i to overwrite a local file
CVE-2020-8231: libcurl with CURLOPT_CONNECT_ONLY information leak due to wrong connection
CVE-2020-8284: PASV response could trick curl into connecting back to an arbitrary IP address and port
CVE-2020-8285: libcurl could run out of stack space using FTP wildcard matching (CURLOPT_CHUNK_BGN_FUNCTION)
CVE-2020-8286: failure to verify that OSCP response matches intended certificate
CVE-2021-22876: libcurl did not strip user credentials from URL when populating Referer HTTP request header
CVE-2021-22890: libcurl using HTTPS proxy with TLS1.3 could use the wrong session ticket and bypass server TLS certificate check
Vulnerable: <= 7.64.0-4+deb10u1Fixed: 7.64.0-4+deb10u2
4.0.0-4.3.0
2616968
CVE-2021-28957: lxml, a Python binding for the libxml2 and libxslt libraries, did not properly sanitize its input. This would allow a malicious user to mount a cross-site scripting attack
Vulnerable: <= 4.3.2-1+deb10u2Fixed: 4.3.2-1+deb10u3
4.0.0-4.3.0
2616965
CVE-2021-27291: Pygments, a syntax highlighting package written in Python 3, used regular expressions which could result in denial of service
Vulnerable: <= 2.3.1+dfsg-1+deb10u1Fixed: 2.3.1+dfsg-1+deb10u2
4.0.0-4.3.0
2616955
CVE-2021-3449: A NULL pointer dereference was found in the signature_algorithms processing in OpenSSL, a Secure Sockets Layer toolkit, which could result in denial of service
Vulnerable: <= 1.1.1d-0+deb10u5Fixed: 1.1.1d-0+deb10u6
4.0.0-4.3.0
2614016
The switch firmware incorrectly identifies Lenovo LR4 transceivers (part number 00YD278) and does not set the laser levels properly, which can prevent the link from coming up or might cause the transceiver to be identified as a 1G module.4.2.0-4.3.0
2578872
CVE-2021-20270: It was discovered that Pygments, a syntax highlighting package written in Python, could be forced into an infinite loop, resulting in denial of service
Vulnerable: 2.3.1+dfsg-1Fixed: 2.3.1+dfsg-1+deb10u1
4.0.0-4.3.0
2578870
CVE-2020-35523 CVE-2020-35524: Two vulnerabilities have been discovered in the libtiff library and the included tools, which may result in denial of service or the execution of arbitrary code if malformed image files are processed
Vulnerable: <= 4.1.0+git191117-2~deb10u1Fixed: 4.1.0+git191117-2~deb10u2
4.0.0-4.3.0
2578814
On NVIDIA Spectrum switches, BUM traffic might be dropped during VXLAN decapsulation in an EVPN multihoming environment after multiple PIM uplink interfaces flap.4.3.0
2574368
When you run the NCLU net add bgp maximum-paths ibgp command, FRR restarts unexpectedly
To work around this issue, either use the vtysh commands or edit the /etc/frr/frr.conf file directly, then run systemctl reload frr.
4.1.1-4.3.0
2566880
CVE-2021-27803: A vulnerability was discovered in how p2p/p2p_pd.c in wpa_supplicant before 2.10 processes P2P (Wi-Fi Direct) provision discovery requests. It could result in denial of service or other impact (potentially execution of arbitrary code), for an attacker within radio range.3.7.14-3.7.14.2, 4.0.0-4.3.03.7.15
2564839
Several vulnerabilities have been discovered in the GRUB2 bootloader:CVE-2020-14372: It was discovered that the acpi command allows a privileged user to load crafted ACPI tables when Secure Boot is enabled
CVE-2020-25632: A use-after-free vulnerability was found in the rmmod command
CVE-2020-25647: An out-of-bound write vulnerability was found in the grub_usb_device_initialize() function, which is called to handle USB device initialization
CVE-2020-27749: A stack buffer overflow flaw was found in grub_parser_split_cmdline
CVE-2020-27779: It was discovered that the cutmem command allows a privileged user to remove memory regions when Secure Boot is enabled
CVE-2021-20225: A heap out-of-bounds write vulnerability was found in the short form option parser
CVE-2021-20233: A heap out-of-bound write flaw was found caused by mis-calculation of space required for quoting in the menu rendering.
4.0.0-4.3.0
2558184
The Mellanox SN2700 and SN2410 switch intermittently reports PSU fan state changes with Unable to read from device/fan1_input/pwm1 syslog messages.3.7.11-3.7.15, 4.1.1-4.3.0
2556816
CM-33419
When ARP suppression is enabled, RARP packets sometimes get dropped and are not flooded by the local VTEP.
To work around this issue, disable ARP suppression.
3.7.14-3.7.14.2, 4.3.03.7.15
2556783
CM-33398
CVE-2021-0326: An issue has been found in wpa, a set of tools to support WPA and WPA2 (IEEE 802.11i). Missing validation of data can result in a buffer over-write, which might lead to a DoS of the wpa_supplicant process or potentially arbitrary code execution.
Vulnerable: <= 2.8.0-cl3.7.14u1, <= 2.8.0-cl4.2.1u1
3.7.14-3.7.14.2, 4.0.0-4.3.03.7.15
2556778
CM-33395
CVE-2021-26937: A flaw in the handling of combining characters in screen, a terminal multiplexer with VT100/ANSI terminal emulation can result in denial of service, or potentially the execution of arbitrary code via a specially crafted UTF-8 character sequence.
Vulnerable: 4.6.2-3
Fixed: 4.6.2-3+deb10u1
4.0.0-4.3.0
2556776
CM-33394
CVE-2021-27212: A vulnerability in the Certificate List Exact Assertion validation was discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. An unauthenticated remote attacker can take advantage of this flaw to cause a denial of service (slapd daemon crash) via specially crafted packets.
Vulnerable: <= 2.4.47+dfsg-3+deb10u5
Fixed: 2.4.47+dfsg-3+deb10u6
4.0.0-4.3.0
2556775
CM-33393
DSA-4859-1 (no CVE): zstd, a compression utility, was vulnerable to a race condition: it temporarily exposed, during a very short timeframe, a world-readable version of its input even if the original file had restrictive permissions.
Vulnerable: <= 1.3.8+dfsg-3+deb10u1
Fixed: 1.3.8+dfsg-3+deb10u2
4.0.0-4.3.0
2556772
CM-33391
The net show clag verify-vlans command fails with the following log:

WARNING: ‘/usr/bin/clagctl verifyvlans’ failed due to:
Command ‘['/usr/bin/clagctl’, ‘verifyvlans’]’ returned non-zero exit status 1

To work around this issue, run the /usr/bin/clagctl verifyvlans command or the net show clag verbose command.
4.2.1-4.3.0
2556764
CM-33385
In a configuration with both traditional and vlan-aware bridges, the VLAN membership check on a vlan-aware switch does not drop PVST BPBUs that come from a traditional bridge.3.7.14-3.7.14.2, 4.0.0-4.3.03.7.15
2556731
CM-33359
CVE-2020-8625: A buffer overflow vulnerability was discovered in the SPNEGO implementation affecting the GSSAPI security policy negotiation in BIND, a DNS server implementation, which could result in denial of service (daemon crash), or potentially the execution of arbitrary code.
Vulnerable: <= 9.11.5.P4+dfsg-5.1+deb10u2
Fixed: 9.11.5.P4+dfsg-5.1+deb10u3
4.0.0-4.3.0
2556691
CM-33334
The following vulnerabilities have been announced in the openssl packages:
CVE-2021-23840: Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash.
CVE-2021-23841: The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained
within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack.
CVE-2019-1551: There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME.
Vulnerable: <= 1.1.1d-0+deb10u4
Fixed: 1.1.1d-0+deb10u5
4.0.0-4.3.0
2556659
CM-33315
CVE-2020-35498: A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.
Vulnerable: <= 2.8.90-1-cl4u5
4.0.0-4.3.0
2556569
CM-33283
DSA-4850-1 (no CVE): libzstd adds read permissions to files while being compressed or uncompressed.
Vulnerable: 1.3.8+dfsg-3
Fixed: 1.3.8+dfsg-3+deb10u1
4.0.0-4.3.0
2556500
CM-33258
Cumulus Linux does not support bond members at 200G or greater.4.0.0-4.3.0
2556456
CM-33237
CVE-2020-36221, CVE-2020-36222, CVE-2020-36223, CVE-2020-36224, CVE-2020-36225, CVE-2020-36226, CVE-2020-36227, CVE-2020-36228, CVE-2020-36229, CVE-2020-36230: Several vulnerabilities were discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. An unauthenticated remote attacker can take advantage of these flaws to cause a denial of service (slapd daemon crash, infinite loops) via specially crafted packets.
Vulnerable: <= 2.4.47+dfsg-3+deb10u4
Fixed: 2.4.47+dfsg-3+deb10u5
4.0.0-4.3.0
2556369
CM-33196
If you use NCLU to configure an ACL for eth0, you can’t designate it as an INPUT rule; the rule is automatically created as a FORWARD rule in the /etc/cumulus/acl/policy.d/50_nclu_acl.rules file.
To work around this issue, manually create an ACL in the /etc/cumulus/acl/policy.d/ file with “-A INPUT -i eth0”.
4.2.1-4.3.0
2556353
CM-33185
In vtysh you can enable and disable debugs from either exec mode or global configuration mode (config t). When disabling OSPF debugs from exec mode, the debug is disabled at runtime but left in the running-configuration.
To work around this issue, disable OSPF debugs from global configuration mode (config t).
4.2.1-4.3.0
2556249
CM-33139
On a Mellanox switch, the cl-resource-query -j command takes a long time to run with the max acl-heavy or ip-acl-heavy profile.4.3.0
2556082
CM-33050
The NCLU net del vrf command does not delete a numbered VRF. For example:

cumulus@leaf01:~$ net del vrf 55
ERROR: Command not found
4.2.1-4.3.0
2556081
CM-33049
You cannot set the time zone can with NCLU commands.4.1.1-4.3.0
2556061
CM-33032
On Edgecore AS4610 switches, the historic CPU usage displayed in /run/sysmonitor/history sometimes shows as a negative value.3.7.12-3.7.15, 4.2.1-4.3.0
2555932
CM-32953
On Mellanox switches, you can’t ping the SVI of the MLAG peer over the peer link after the packet is VXLAN decapsulated.4.2.1-4.3.0
2555873
CM-32914
On Mellanox switches, egress ACLs with VLAN keys do not filter layer 2 multicast or broadcast traffic.4.3.0
2555763
CM-32861
The NCLU net del bgp neighbor command does not delete the neighbor and displays an error similar to the following:

ERROR: — /run/nclu/frr/frr.conf.scratchpad.baseline 2021-01-04 17:23:59.250463331 +0000
+++ /run/nclu/frr/frr.conf.scratchpad 2021-01-04 17:25:59.213673980 +0000

To work around this issue, use the FRR command to delete a neighbor.
4.3.0
2555613
CM-32786
The net show configuration commands command incorrectly displays the NCLU syntax to disable IPv6 forwarding on interfaces. For example:

# net show configuration commands
net add vlan 1 ip6-forward off

The correct NCLU command to disable IPv6 forwarding is net add vlan 1 ipv6 forward off (without the hyphen).
4.2.1-4.3.0
2555318
CM-32612
If you try to enable BGP graceful restart when it is already enabled, you see an error similar to the following in the frr.log file:

2020-12-07T19:20:26.004333+00:00 cumulus bgpd[4954]: VRF default: Handle GR command GLOBAL_GR_CMD, current GR state GLOBAL_GR, new GR state GLOBAL_INVALID

This error has no functional impact.
4.3.0
2554986
CM-32416
The ethtool utility doesn’t contain the latest values, as a result the Revision Compliance field shows Unallocated.4.2.1-4.3.0
2554812
CM-32296
If the RMAC of a layer 3 SVI changes, the show vrf vni command is not updated with the new value. However, the new RMAC is seen in the show evpn vni command and is present on self-originated EVPN routes.4.2.1-4.3.0
2554798
CM-32286
On the Mellanox SN3700C switch, PIM multicast packets are duplicated at the egress VTEP.4.2.0-4.3.0
2554783
CM-32274
If you apply an outbound route map to a BGP peer that uses set as-path prepend last-as, advertised locally-originated routes have the ASN of the peer prepended to the AS path.
This might trigger AS path loop prevention on the peer, where the peer ignores locally-originated prefixes.
4.2.1-4.3.0
2554709
CM-32217
The IP address specified in the ip pim use-source command configured on the loopback interface should be inherited by unnumbered interfaces during their Primary IP address selection process. If ip pim use-source is configured on the loopback after an unnumbered interface has already selected their Primary IP address, the unnumbered interface does not update its Primary IP address to be the new use-source value until after there is a netlink update for that interface.
To work around this issue, configure ip pim use-source on each unnumbered interface directly or ensure ip pim use-source is applied to the loopback before other unnumbered interfaces are enabled for PIM.
3.7.13-3.7.15, 4.2.1-4.3.0
2554582
CM-32144
On switches with the Maverick ASIC, control traffic is dropped due to receive buffering.4.2.0-4.3.0
2554533
CM-32112
On the ARM platform, NTP peer associations slowly increase to larger offsets (~500ms).4.0.0-4.3.0
2554466
CM-32068
Kernel routes added by iproute2 are missing in FRR after an interface flap.
To work around this issue, configure a static route in FRR.
4.2.1-4.3.0
2554299
CM-31962
In a VRRP configuration, BGP unnumbered sessions for VRFs fail to establish after a networking restart.4.2.0-4.3.0
2554222
CM-31921
The NCLU command to enable bridge learning fails.
As a work around, enable bridge learning in the /etc/network/interface file. For example:

auto vni-30
iface vni-30
vxlan-id 30
bridge-access 30
bridge-arp-nd-suppress on
bridge-learning on
vxlan-local-tunnelip 10.10.10.1
mstpctl-bpduguard yes
mstpctl-portbpdufilter yes
mtu 9166
4.2.1-4.3.0
2554218
CM-31917
MLAG packets received on the peer link are dropped instead of routed.4.2.0-4.3.0
2554202
CM-31904
The output of the net show commit command does not show the last commit or the specified commit number but is empty instead.4.2.1-4.3.0
2553887
CM-31700
When using TACACS+ configured with a DEFAULT user providing privilege level lower than 16, TACACS+ configured users with privilege level 16 access might not be able to run privilege level 16 NCLU commands, such as net add and net del and see an error similar to the following:

ERROR: You do not have permission to execute that command.

To work around this issue, remove the DEFAULT user from the TACACS+ server.
3.7.7-3.7.15, 4.0.0-4.3.0
2553677
CM-31605
When you configure an SNMPv3 user with the net-snmp-config configuration command from the libsnmp-dev package, you get an error message similar to the one below:

cumulus@switch:mgmt-vrf:~$ sudo net-snmp-config –create-snmpv3-user -a shaauthpass -x aesprivpass -A SHA -X AES userSHAwithAES
adding the following line to /var/lib/snmp/snmpd.conf:
createUser userSHAwithAES SHA “shaauthpass” AES “aesprivpass”
adding the following line to /snmp/snmpd.conf:
rwuser userSHAwithAES
touch: cannot touch ‘/snmp/snmpd.conf’: No such file or directory
/usr/bin/net-snmp-create-v3-user: 144: /usr/bin/net-snmp-create-v3-user: cannot create /snmp/snmpd.conf: Directory nonexistent

To work around this issue, use the NCLU command to configure SNMPv3 user parameters; for example:

cumulus@switch:mgmt-vrf:~$ net add snmp-server username user999 auth-md5 user999password encrypt-des user999encryption

Alternatively, directly edit the /etc/snmp/snmpd.conf file as described in the documentation.
3.7.13-3.7.15, 4.0.0-4.3.0
2553237
CM-31418
The default NTP configuration is to use eth0 as the NTP source interface. In Cumulus Linux 4.0 and later, eth0 is in the management VRF by default; therefore the NTP service runs automatically in the management VRF.
NVIDIA does not recommend running NTP with a source interface other than eth0 as this can expose a security vulnerability. Changing the NTP source interface name with NCLU to a non-management VRF interface might result in NTP not functioning because the NTP service is still running in the management VRF.

4.2.0-4.3.0
2553116
CM-31357
When you manually set the link speed or duplex mode with ethtool to an unsupported value, then run a TDR check against the interface, you encounter a switchd service heartbeat failure.
To work around this issue, reboot the switch to clear the condition. Avoid setting the interface speed or duplex mode directly with ethtool.
3.7.12-3.7.15, 4.0.0-4.3.0
2553015
CM-31300
If a neighbour contains a special character in PortID for LLDP, the net show interface command does not display the LLDP information or the command might fail.3.7.10-3.7.15, 4.2.0-4.3.0
2552691
CM-31111
On the EdgeCore AS4610 switch, the eth0 interface remains down when physically connected to a 1G interface.
To work around this issue, configure the link speed to 1000 and set auto-negotiation on for the eth0 interface, then flap eth0 with the ip link set eth0 down/up command to bring up the port.
4.2.0-4.3.0
2552453
CM-30987
On the Mellanox switch, RoCE with PFC configuration is not applied to all ports in hardware when a range is used in the traffic.conf file.
To work around this issue, use NCLU to configure RoCE with PFC or list individual ports in the traffic.conf file.
4.2.0-4.3.0
2552309
CM-30889
The following messages are seen on an Edgecord Minipack-AS8000 running Cumulus Linux 4.2.0:


Hal_bcm_console.c:294 MMU config profile 0 prigroup 0: Service Pool 0 has no space and cannot be assigned
Hal_bcm_console.c:294 MMU config port 0 idx 0: Pool 0 has no space and cannot be assigned


These messages are for internal validation purposes only and can be safely ignored.

4.2.0-4.3.0
2552294
CM-30879
NCLU restarts FRR when removing a BGP VRF IPv4 aggregate-address command.
3.7.12-3.7.15, 4.0.0-4.3.0
2552266
CM-30863
OpenSSH scp is vulnerable to CVE-2020-15778, where clients that have authorized access to the SSH server can execute commands on the server by copying maliciously named files.
The two scenarios where an exploit may be useful to an attacker:
-The user is authorized to scp but not ssh (based on the command option in the authorized_keys file), so this vulnerability can allow executing a remote command on the target computer when not authorized to do so.
-An attacker plants a maliciously named file in a directory tree that someone later uses scp -r to copy over to the target computer.
Be aware that restricting users to scp by using the command option in the authorized_keys file is not effective in preventing those users from executing arbitrary commands on the server.
If you want to use scp -r to copy directory trees, avoid copying directory trees to which attackers may have added maliciously-named files. Archiving the directory tree with tar, zip, or a similar program, then copying the archive over to be extracted on the server avoids having to use scp -r altogether. In addition, OpenSSH provides sftp, which you can use instead of scp to copy files.
To disable scp completely, use /bin/chmod 0 /usr/bin/scp .
3.7.14-3.7.15, 4.0.0-4.3.0
2552214
The Mellanox SN2700 and SN2410 switch intermittently reports PSU fan state changes with Unable to read from device/fan1_input/pwm1 syslog messages.3.7.11-3.7.14, 4.1.1-4.3.03.7.14.2-3.7.15
2552213
The Mellanox SN2700 and SN2410 switch intermittently reports PSU fan state changes with Unable to read from device/fan1_input/pwm1 syslog messages.3.7.11-3.7.14.2, 4.1.1-4.3.03.7.15
2551666
CM-30473
If you modify an interface name, then reuse the previous interface name for a different VLAN, the ifreload -a command generates an error similar to the following:

warning: : interface not recognized - please check interface configuration

4.1.0-4.3.0
2551578
CM-30422
When you configure a bridge in the /etc/network/interfaces file, then try to reconfigure the bridge to be a VRF interface with the same name, ifreload/ifup commands fail with an invalid table id or unable to get vrf table id error.3.7.12-3.7.15, 4.0.0-4.3.0
2551565
CM-30414
If you toggle VRRP priority values between VRRP routers, then restart switchd, a few IPv6 VRRP instances might not converge. As a result, both the VRRP routers act as master routers for the impacted IPv6 VRRP instances. IPv4 VRRP instances are not affected
To work around this issue, remove, then add back the VRRP configuration with NCLU or vtysh commands.
3.7.13-3.7.15, 4.2.0-4.3.0
2551335
CM-30312
When TACACS+ is configured and the management VRF is enabled, users with privilege level 13 are prevented from running ip and cat commands.4.0.0-4.3.0
2551305
CM-30296
The net show configuration command provides the wrong net add command for ACL under the VLAN interface.

3.7.12-3.7.15, 4.1.0-4.3.0
2551273
CM-30280
On a Mellanox SN2010 switch, the Locator LED is on after you upgrade Cumulus Linux.4.1.0-4.3.0
2550974
CM-30195
On the Dell S3000 switch, after installing the Cumulus Linux 4.1.1 disk image without a license, the switch sends a link beat if a remote host port is configured.3.7.11-3.7.15, 4.1.1-4.3.0
2550950
CM-30182
The net show time ntp servers command does not show any output with management VRF.4.1.1-4.3.0
2550793
CM-30101
The NCLU net show bridge spanning-tree command displays the aging timer incorrectly.3.7.12-3.7.15, 4.0.0-4.3.0
2550713
CM-30052
Configuring the subinterface of a VXLAN uplink under another traditional bridge, which also has the VXLAN VNI enslaved, causes switchd to use high CPU due to very frequent VXLAN tunnel sync events.
To work around this issue, do not enslave the subinterface of a VXLAN layer 3 uplink under a traditional bridge in a VXLAN configuration.
4.1.1-4.3.0
2550704
On the Mellanox SN3420 switch, 25G SR optics only link up in force mode.4.3.0
2550466
CM-29890
Multiple paths to identical EVPN prefixes are either not displayed or not accepted into the l2vpn evpn table if they are received from a different AS.3.7.12-3.7.15, 4.1.1-4.3.0
2550444
CM-29872
Tab completion for the net show rollback description command returns information about a snapshot instead of context help.
To work around this issue, run the net show commit history command to find descriptions instead of the net show rollback description command.
3.7.12-3.7.15, 4.0.0-4.3.0
2550443
CM-29871
The net show rollback description command returns an error even if the string matches a commit description.
To work around this issue, look for your string in the output of the net show commit history command (or grep for it there) instead.
3.7.12-3.7.15, 4.0.0-4.3.0
2550243
CM-29759
When you use nginx and restserver in management VRF to provide a REST API for the switch, nginx starts but restserver fails to start.
To work around this issue, comment out the Requires= line in the /lib/systemd/system/restserver.service. For example:

#Requires=nginx.service restserver.socket
3.7.12-3.7.15, 4.0.0-4.3.0
2550056
CM-29652
The ACCTON-DIAG option under the Cumulus Linux GRUB menu does not work. When you select this option, you see the following error:

error: invalid signature.
Press any key to continue…
3.7.12-3.7.15, 4.1.1-4.3.0
2549925
CM-29594
When you run an Ansible script to replace the /etc/network/interfaces file, then run the ifreload -a command, you see errors similar to the following:

error: swp1s1.2: netlink: cannot set link swp1s1.2 up: operation failed with ‘Network is down’ (100)
warning: cmd ‘/bin/ip addr del 10.0.0.1/24 dev eth0’ failed: returned 2 (RTNETLINK answers: Cannot assign requested address

To work around this issue, run the ifreload -a command a second time.
3.7.12-3.7.15, 4.0.0-4.3.0
2549872
CM-29562
If you have an SVI with multiple VRR IP addresses and try to delete one of the VRR configurations, net commit or ifreload -a returns an error.3.7.12-3.7.15, 4.1.1-4.3.0
2549782
CM-29519
The JSON format output of the net show bgp l2vpn evpn summary command shows the incorrect neighbour state.3.7.12-3.7.15, 4.0.0-4.3.0
2549731
CM-29492
When you create SPAN or ERSPAN rules in ebtables, the action fails to install if it is not in lowercase. Make sure that the SPAN or ERSPAN action is all lowercase; for example:

[ebtables]
-A FORWARD –in-interface swp10 -j span –dport swp1
3.7.12-3.7.15, 4.1.1-4.3.0
2549392
CM-29319
When you configure an RD or RT with NCLU, you see duplicate VNI stanzas in the /etc/frr/frr.conf file.
To work around this issue, manually edit the etc/frr/frr.conf file to define advertise-all-vni before the RD or RT configuration within the l2vpn EVPN address family, then reload the FRR service with the sudo systemctl reload frr command.
4.1.0-4.3.0
2549371
CM-29309
When Optimized Multicast Flooding (OMF) is enabled with the bridge.optimized_mcast_flood = TRUE setting in the /etc/cumulus/switchd.conf file, the switch continues to flood IPv6 multicast traffic to all slave ports when there is no MLD join receive.3.7.11-3.7.15, 4.0.0-4.3.0
2548924
CM-29146
On the EdgeCore Minipack AS8000, storm control does not restrict unknown unicast, broadcast, or multicast traffic.4.1.1-4.3.0
2548315
CM-28816
The following security advisory has been announced for bash:
CVE-2019-18276 Qualys scan QID 372268 setuid vulnerability
When bash or bash scripts are run setuid, bash is supposed to drop privileges, but does so incorrectly, so that an attacker with command access to the shell can use enable -f for runtime loading of a new builtin that calls setuid() to regain dropped privileges.
To work around this issue, do not make bash or bash scripts setuid.
3.7.12-3.7.15, 4.0.0-4.3.0
2548260
CM-28770
The net add routing route-map permit set community command does not add the set statement into the /etc/frr/frr.conf file.4.0.0-4.3.0
2548243
CM-28754
On switches with the Trident2+ ASIC, adding SPAN rules disables PBR rules.3.7.3-3.7.15, 4.0.0-4.3.0
2548181
CM-28705
On the Mellanox SN3800 switch, 4x25G DAC breakouts are not supported.4.1.0-4.3.0
2548117
CM-28659
In OVSDB traditional bridge mode, adding or removing a VLAN binding causes a traffic forwarding outage for around 20 seconds or more on adjacent VLAN bindings. Cumulus Linux does not support traditional bridge mode with VMware NSX.3.7.12-3.7.15, 4.0.0-4.3.0
2548062
CM-28622
When ports are split to 4x25G, RS FEC needs to explicitly configured on both ends (especially when interoperating with non-Mellanox switches).4.1.0-4.3.0
2548060
CM-28620
On the Mellanox SN3800 switch, links do not come up when the ports are configured for 40G.4.1.0-4.3.0
2547903
CM-28506
CVE-2019-19956: xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs
Vulnerable: 2.9.4+dfsg1-7Fixed: 2.9.4+dfsg1-7+deb10u1
4.0.0-4.3.0
2547890
CM-28497
QinQ across VXLAN on a traditional bridge does not work.4.1.0-4.3.0
2547706
CM-28397
When you configure ganged ports in the ports.conf file, the change does not take effect after you restart switchd.
To work around this issue, reboot the switch.
3.7.11-3.7.15, 4.0.0-4.3.0
2547405
CM-28226
When you restart the hsflowd service, you see a systemd warning message similar to the following:

Warning: The unit file, source configuration file or drop-ins of hsflowd@mgmt.service changed on disk. Run ‘systemctl daemon-reload’.
4.0.0-4.3.0
2546991
CM-28003
The FRR service does not provide a way for automation to know if the configuration applied properly.
To work around this issue, execute the vtysh -f command in the automation file before starting the FRR service to validate the functional configuration and return an error code.
3.7.11-3.7.15, 4.0.0-4.3.0
2546895
CM-27957
If you have configured a higher number of ports and VLANs (ports x VLANs) or the switch is a lower-powered (CPU) platform, the switchd service might fail to send a systemd keepalive within the watchdog timeout value (2 minutes by default) and you see an error similar to the following:
bq. systemd[1]: switchd.service watchdog timeout (limit 2min)!
To workaround this issue, either reduce the number of configured interfaces and, or VLANs, or increase the systemd timeout for switchd.service
To increase the systemd timeout:1. Edit the /etc/systemd/system/switchd.service.d/override.conf file and increase the WatchdogSec parameter
2. Restart the switchd service with the sudo systemctl restart switchd.service command
systemd attempts to restart the switchd service automatically (after the watchdog timeout). If the restart fails multiple times in a short time period, run the sudo systemctl reset-failed command followed by the sudo systemctl restart switchd command.
3.7.11-3.7.15, 4.0.0-4.3.0
2546874
CM-27950
On the Dell S5232F, S5248F, S5296F, and S3048 switch, using the poweroff or halt commands does not fully power off the switch.4.0.0-4.3.0
2545837
CM-27444
If you use the NCLU commands to configure NTP and run the net add time ntp source command before you run the net add time ntp server iburst command, the /etc/ntp.conf file is misconfigured.
To work around this issue, run the net add time ntp server iburst command before you run the net add time ntp source command.
3.7.10-3.7.11, 4.0.0-4.3.03.7.12-3.7.15
2545520
CM-27243
The length of the netlink message is not set properly for non-bridge family type messages. The same length is used for both bridge and non-bridge even though the bridge family type message has an extra attribute. This causes extra bytes to be left over in non-bridge family type netlink messages.3.7.10, 4.0.0-4.3.03.7.11-3.7.15
2545239
CM-27099
On the Mellanox switch with the Spectrum-2 ASIC, Precision Time Protocol (PTP) is not currently supported.4.0.0-4.3.0
2545233
CM-27094
On the Delta AG9032v1 switch, smonctl and sensors report inaccurate PSU current and power.4.0.0-4.3.0
2545125
CM-27018
If you configure more than one VRR interface on an SVI interface, deleting one of the VRR addresses does not remove the interface/address.3.7.10-3.7.15, 4.0.0-4.3.0
2544978
CM-26921
If you delete an undefined bond, then add a bond slave, the net commit command fails.3.7.9-3.7.15, 4.0.0-4.3.0
2544968
CM-26913
FRR configuration commands for an SVI interface might have the \n misplaced in the output. For example:

sudo sh -c “printf ‘interface 50\nvrf TEST description L3 routing interface\n’ » /etc/frr/frr.conf”

should be:

sudo sh -c “printf ‘interface 50 vrf TEST\ndescription L3 routing interface\n’ » /etc/frr/frr.conf”

To work around this issue, configure the interface manually in the /etc/frr/frr.conf file.
3.7.9-3.7.15, 4.0.0-4.3.0
2544957
CM-26907
NCLU incorrectly allows you to apply port security configuration on layer 2 and layer 3 ports that are not part of a bridge.4.0.0-4.3.0
2544953
CM-26905
When you update the hostname of a switch with the NCLU net add hostname command, then run net commit, the lldpd service does not restart and other devices still see the old hostname.
To work around this issue, run the sudo systemctl restart lldpd.service command.
3.7.10-3.7.15, 4.0.0-4.3.0
2544880
CM-26860
When you run the NCLU net show commit last or net show commit command, where is the last commit, no output is shown.4.0.0-4.3.0
2544723
CM-26769
Setting ProtoDown on ports populated with SFP modules providing RJ-45 1000BASE-T interfaces does not cause the carrier to be dropped. The kernel shows carrier down; however, the remote device still shows a link.3.7.6-3.7.10, 4.0.0-4.3.03.7.11-3.7.15
2544463
CM-26599
Auto-negotiation does not work with the QSFP28 cables and a remote system operating at 10G. Attempting to enable auto-negotiation with ethtool -s swp<#> autoneg on returns Operation not supported.
To work around this issue, do not use auto-negotiation and set the local port speed to 10G.
3.7.9-3.7.15, 4.0.0-4.3.0
2544456
CM-26595
The NCLU net show lldp command displays the speed of a ganged port group as the speed of one of the individual links, rather than the sum of their speeds.3.7.9-3.7.15, 4.0.0-4.3.0
2544311
CM-26516
Applying a policy-based routing (PBR) rule for all traffic from a host might disrupt ARP refresh for that connected host.3.7.5-3.7.15, 4.0.0-4.3.0
2544155
CM-26423
NCLU requires you to specify an interface with multiple address-virtual statements in ascending MAC address order.

3.7.5-3.7.15, 4.0.0-4.3.0
2544113
CM-26412
Mac learning is not disabled by default on a double tagged peer link interface resulting in the MAC address changing between the MLAG bond and the peer link.
To work around this issue, disable MAC learning on QinQ VLANs by adding bridge-learning off to the VLAN stanza in the etc/network/interfaces file.
3.7.9-3.7.15, 4.0.0-4.3.0
2543937
CM-26308
An interface alias configured outside FRR using iproute2 is imported into the FRR running configuration and overrides the internal description. After an FRR reload, this causes FRR to delete the interface alias in an inefficient way. Depending on how many interfaces with aliases you have configured, this can cause a FRR reload to time out.
To work around this issue, remove the interface alias description from iproute2.
3.7.8-3.7.10, 4.0.0-4.3.03.7.11-3.7.15
2543900
CM-26288
On the Mellanox switch, static VXLAN tunnels incorrectly allow traffic from any remote tunnel IP address.3.7.8-3.7.15, 4.0.0-4.3.0
2543841
CM-26256
The net show evpn vni detail json command includes an extra empty dictionary at the end of the output.
3.7.8-3.7.15, 4.0.0-4.3.0
2543816
CM-26241
On the Dell S5248F-ON switch, smond might generate syslog messages indicating that the fan input RPM is lower than the normal low speed of 2500 RPM. Speeds as low as 1700 RPM are acceptable in normal thermal environments; therefore, you can ignore these messages.
3.7.6-3.7.11, 4.0.0-4.3.03.7.12-3.7.15
2543781
CM-26217
NCLU does not allow you to configure OSPF NSSAs. For example:

cumulus@switch:~$ net add ospf area 0.0.0.1 nssa
ERROR: Command not found.
net add ospf area 0.0.0.1 nssa

To work around this issue, use FRR instead. For example:

switch# configure terminal
switch(config)# router ospf
switch(config-router)# area 0.0.0.1 nssa
3.7.7-3.7.10, 4.0.0-4.3.03.7.11-3.7.15
2543724
CM-26179
If a hostname contains utf-8 characters, the NCLU net show lldp command outputs the following error:

ERROR: ‘ascii’ codec can’t encode character u'\xe9' in position 3: ordinal not in range(128)
See /var/log/netd.log for more details.
3.7.7-3.7.10, 4.0.0-4.3.03.7.11-3.7.15
2543646
CM-26136
In an ebtables rule, ERSPAN (upper case) does not work. You need to specify erspan (lower case).3.7.6-3.7.15, 4.0.0-4.3.0
2543211
CM-25890
In some cases, the switchd service might warn of excessive MAC moves from one switch port to itself (for example, from swp18 to swp18).
3.7.0-3.7.15, 4.0.0-4.3.0
2543164
CM-25859
The MTU of an SVI cannot be higher than the MTU on the bridge. Changing the MTU on the SVI with NCLU does not update the bridge MTU. The net commit command succeeds even though the MTU is not changed as expected.
To work around this issue, change the MTU on all SVIs and the bridge manually in the /etc/network/interfaces file, then apply the change with the ifreload -a command.
3.7.7-3.7.15, 4.0.0-4.3.0
2543096
CM-25815
When an SVI with a virtual MAC is configured with a layer 2 VNI in an EVPN environment, if you replace the /etc/network/interfaces file with a different file that does not have the SVI and layer 2 VNI configuration, the original virtual MAC is not populated through the EVPN route until FRR is restarted.
3.7.6-3.7.15, 4.0.0-4.3.0
2542945
CM-25740
On the Broadcom Maverick switch with a QinQ configuration, the packets coming into the CPU might be tagged incorrectly; for example, 802.1ad + 802.1q tags are expected in the packets but the packets have 802.1q + 802.1q tags.
To work around this issue, configure the bridge with bridge-vlan-protocol 802.1ad:

cumulus@switch:~$ net add bridge mybridge vlan-protocol 802.1ad
3.7.6-3.7.15, 4.0.0-4.3.0
2542837
CM-25674
On Mellanox switches, policer iptables are not working as expected. For example, when using a policer with mode KB/MB/GB to rate-limit interfaces, the syntax is accepted but the data plane transfer speed is not affected by the rule.3.7.6-3.7.8, 4.0.0-4.3.03.7.9-3.7.15
2542305
CM-25400
If an SVI exists in the configuration before you assign it an IP address, when you do assign the IP address with the NCLU command, the vlan-id and the raw-device bridge stanzas are not added automatically.
3.7.6-3.7.15, 4.0.0-4.3.0
2542301
CM-25397
When first creating a bond and enslaving an interface, NCLU hides some of the bridge command suggestions, although they are still accepted.
3.7.3-3.7.15, 4.0.0-4.3.0
2541212
CM-24894
The maximum-prefix configuration under the IPv4 address family has an optional restart value, which you can configure. This configuration is ignored and, instead of restarting the sessions every x minutes, the peer constantly changes between established and idle due to the prefix count being exceeded.3.7.5-3.7.15, 4.0.0-4.3.0
2541029
CM-24799
On switches with the Trident2 ASIC, 802.1Q-encapsulated control plane traffic received on an interface with 802.1AD configured subinterfaces might be dropped.
This issue only affects QinQ configurations.
3.7.5-3.7.15, 4.0.0-4.3.0
2540753
CM-24618
If the interface alias contains a single or double quotation mark, or an apostrophe, the net show configuration commands fail with the following error:
 
ERROR: No closing quotation
See /var/log/netd.log for more details.

3.7.5-3.7.15, 4.0.0-4.3.0
2540444
CM-24473
SNMP incorrectly requires engine ID specification.
3.7.4-3.7.15, 4.0.0-4.3.0
2540352
CM-24435
When you use NCLU to configure a route map, the parser allows for glob matching of interfaces for a match interface condition when there can only be a single interface matched. The proper syntax is to use multiple route map clauses, each matching a single interface, instead of a single clause matching multiple interfaces.
For example, this command is incorrect:
 
net add routing route-map Proxy-ARP permit 25 match interface swp9-10

These commands are correct:
 
net add routing route-map Proxy-ARP permit 25 match interface swp9
net add routing route-map Proxy-ARP permit 30 match interface swp10

3.7.2-3.7.15, 4.0.0-4.3.0
2540340
CM-24426
NCLU allows for the configuration of addresses on VRF interfaces, but tab completion for the net add vrf command just displays . For example:
 
cumulus@switch:~$ net add vrf mgmt


Tab completion for the net add vrf ip address
command works correctly.
3.7.4-3.7.15, 4.0.0-4.3.0
2540274
CM-24379
On the Maverick switch, CPU forwarded packets might be dropped when there is no route to a leaked host route.3.7.5-3.7.15, 4.0.0-4.3.0
2540204
CM-24350
When links come up after FRR is started, VRF connected routes do not get redistributed.3.7.4-3.7.15, 4.0.0-4.3.0
2540192
CM-24343
The net del bridge bridge mcsnoop yes command does not return the value to the default of disabled.
To work around this issue, use the net add bridge bridge mcsnoop no command to delete the mcsnoop attribute and return to the default value.
3.7.4-3.7.15, 4.0.0-4.3.0
2540155
CM-24332
On the Broadcom switch, when moving configuration from bridged to routed (or toggling from routed to bridged to routed), some traffic is not seen by the kernel. This can cause BGP to not establish on a transit node.
3.7.3-3.7.15, 4.0.0-4.3.0
2540042
CM-24272
When you try to configure the VRRP priority and advertisement-interval with NCLU on a traditional mode bridge, the net commit command fails.
To work around this issue, use the vtysh command (inside FRR) to change the VRRP priority or advertisement-interval on traditional bridges. For example:
 
cumulus@switch:~$ sudo vtysh
switch# configure terminal
switch(config)# interface br0.100
switch(config-if)# vrrp 1 priority 110
switch(config-if)# vrrp 1 advertisement-interval
switch(config-if)# end
switch# write memory
switch# exit
cumulus@switch:~

3.7.4-3.7.15, 4.0.0-4.3.0
2540041
CM-24271
On SVIs in a VLAN-aware bridge, you cannot change the VRRP priority with NCLU.
To work around this issue, run the vtysh command inside FRR to change the default priority. For example:
 
cumulus@switch:~$ sudo vtysh
switch# configure terminal
switch(config)# interface vlan100
switch(config-if)# vrrp 1 priority 110
switch(config-if)# end
switch# write memory
switch# exit
cumulus@switch:~

3.7.4-3.7.15, 4.0.0-4.3.0
2540040
CM-24270
Cumulus Linux uses VRRPv3 as the default version, and enables both preempt and accept mode by default. You cannot change these default values with NCLU. To work around this issue, run the vtysh commands (inside FRR) to change the default values. For example:
 
cumulus@switch:~$ sudo vtysh
switch# configure terminal
switch(config)# interface swp4
switch(config-if)# vrrp 1 version 2
switch(config-if)# no vrrp 1 preempt
switch(config-if)# end
switch# write memory
switch# exit
cumulus@switch:~

3.7.4-3.7.15, 4.0.0-4.3.0
2540031
CM-24262
NCLU does not honor auto all in the /etc/network/interfaces file and removes the existing configuration if no individual auto lines exist.
3.7.3-3.7.15, 4.0.0-4.3.0
2539994
CM-24241
When you try to remove a BGP peer group configuration with NCLU, the command fails but no warning message is shown. For example:
 
cumulus@switch:~$ net del bgp neighbor fabric peer-group
‘router bgp 65001’ configuration does not have ‘neighbor fabric peer-group’

3.7.2-3.7.15, 4.0.0-4.3.0
2539962
CM-24222
When an LDAP user that does not have NCLU privileges (either in the netshow or netedit group, or in the /etc/netd.conf file) runs an NCLU command, a traceback occurs instead of a permissions error.
3.7.0-3.7.15, 4.0.0-4.3.0
2539670
CM-24035
On the Edgecore 4610-54P switch, automatic medium-dependent interface crossover (auto-MDIX) stops working on a 100M full duplex interface and does not detect the required cable connection type.
3.7.2-3.7.15, 4.0.0-4.3.0
2539124
CM-23825
The net add interface ptm-enable command adds no ptm-enable for that interface in the frr.conf file.
Running the net add or the net del command does not remove no ptm-enable from the frr.conf file. You have to remove it manually using vtysh.
3.7.2-3.7.15, 4.0.0-4.3.0
2538790
CM-23665
NCLU automatically adds the VLAN ID (for the layer 3 VNI/SVI) to the bridge when you run net add vxlan bridge access . This configuration breaks network connectivity in an EVPN symmetric routing configuration using MLAG.
To restore connectivity, remove the VLAN ID from the bridge.
3.7.2-3.7.15, 4.0.0-4.3.0
2538590
CM-23584
When you configure a control plane ACL to define permit and deny rules destined to the local switch, NCLU programs the control plane ACL rules into the FORWARD chain.
3.7.2-3.7.15, 4.0.0-4.3.0
2538562
CM-23570
On an RMP/1G-T switch, when you remove link-speed 100 with the NCLU command or by editing the etc/network/interfaces file to revert the 100M interface to the default (1G auto), the interface fails to recover and does not come back up.
After you remove the link-speed, ethtool shows the advertised link modes as not reported and Speed/Duplex as unknown.
To work around this issue and bring the interface back up, either restart switchd or use ethtool to configure the speed, advertised, duplex or MDI-X settings.
Note: The advertised link mode gets set incorrectly if you include 1000baseT/Half. The port will come up successfully at 1G.
3.7.2-3.7.15, 4.0.0-4.3.0
2538294
CM-23417
If you use NCLU to create an iBGP peering across the peer link, running the net add bgp l2vpn evpn neighbor peerlink.4094 activate command creates a new eBGP neighborship when one has already been configured for iBGP. This is unexpected; the existing iBGP configuration is valid.3.7.0-3.7.15, 4.0.0-4.3.0
2537699
CM-23075
There is a limitation on the number of SVI interfaces you can specify as DHCP relay interfaces in the /etc/default/isc-dhcp-relay file. For example, 1500 SVI interfaces causes the dhcrelay service to exit without a core file and logs similar to the following are generated for the interfaces:
 
2018-11-10T23:35:30.992370-08:00 Dev dhcrelay: Listening on LPF/vlan.101/a0:00:00:00:00:51
2018-11-10T23:35:30.993472-08:00 Dev dhcrelay: Sending on LPF/vlan.101/a0:00:00:00:00:51

Eventually the dhcrelay service stops.
3.7.1-3.7.15, 4.0.0-4.3.0
2536576
CM-22554
If you try to bring down several members of a bond remotely at the same time, the link state of one of the interfaces might not transition correctly to the down state; however, all links show down in hardware.
4.0.0-4.3.0
2536384
CM-22386
The BFD packet redirection logic used by OVSDB server high availability mode redirects BUM packets across the peer link. The iptables rule for redirection does differentiate between BFD and non-BFD VXLAN inner packets because the service node sends all frames with its own IP address as the tunnel source IP address. The VXLAN encapsulated BUM packets do not get forwarded to the CPU and do not go through the iptable redirection rule; only VXLAN encapsulated BFD packets get forwarded to the CPU due to the inner MAC DA lookup in hardware.
3.7.0-3.7.15, 4.0.0-4.3.0
2536256
CM-22301
For an unresolved address, the IPROUTER default policer rule has been modified to not match on packets exiting a TUNNEL and headed to the CPU to resolve the address via ARP. As a result, the following default rule no longer matches TUNNEL ingress packets.
 
A $INGRESS_CHAIN –in-interface $INGRESS_INTF -m addrtype –dst-type
IPROUTER -j POLICE –set-mode pkt –set-rate 400 –set-burst 100

These packets are now policed by catch all rules.
To work around this issue, the VPORT value on a TRIDENT switch must be changed from binary 011 to 100.
4.0.0-4.3.0
2536242
CM-22287
On the EdgeCore AS7712 (Tomahawk) switch running in atomic mode, when a layer 3 ECMP path is brought down, traffic traversing the path stops working for about four seconds. When the switch is changed to non-atomic mode, the delay is less than one second. This issue is seen across OSPF and static ECMP routes.4.0.0-4.3.0
2536179
CM-22228
On switches with the Trident 2+ ASIC, counters associated with VLANs and VRFs are not working.3.7.0-3.7.15, 4.0.0-4.3.0
2535986
CM-22041
At a high CPU transmit traffic rate (for example, if there is unexpected CPU generated flooding or replication in software), when the ASIC packet driver cannot keep up with the transmit rate because there are no free DMA buffers, it can back pressure by suspending the switch port transmit queues. This can fill up the application socket buffers resulting in No buffer space available error messages on protocol sockets.
When the driver recovers, it automatically resumes the transmit queues. In most cases these error messages are transient. In rare cases, the hardware queues might get stuck, which you can recover with a switchd restart.
3.7.0-3.7.15, 4.0.0-4.3.0
2535965
CM-22020
On the Trident3 switch, static PIM with IIF based on a layer 2 bridge does not work reliably. PIM Join via signaling is required for IPMC to work properly.
To work around this issue, use dynamic signaling (joins) to manage IP multicast traffic.
3.7.0-3.7.15, 4.0.0-4.3.0
2535723
CM-21785
The source address of the ICMPv6 time exceeded message (traceroute hop) is sourced from the wrong VRF when the traceroute target resides on the same switch but in a different VRF.4.0.0-4.3.0
2535605
CM-21667
FRR does not add BGP ttl-security to either the running configuration or to the /etc/frr/frr.conf file when configured on a peer group instead of a specific neighbor.
To work around this issue, add ttl-security to individual neighbors instead of the peer group.
4.0.0-4.3.0
2535209
CM-21278
The net show lldp command sometimes shows the port description in the Remote Port field. The net show interface command shows the correct value in the Remote Host field.
To work around this issue, use net show interface command for LLDP output when connected to Cisco equipment.
3.7.5-3.7.10, 4.0.0-4.3.03.7.11-3.7.15
2534734
CM-20813
Span rules matching the out-interface as a bond do not mirror packets.4.0.0-4.3.0
2533691
CM-19788
If you configure a VLAN under a VLAN-aware bridge and create a subinterface of the same VLAN on one of the bridge ports, the bridge and interface compete for the same VLAN and if the interface is flapped, it stops working. Correcting the configuration and running the ifreload command does not resolve the conflict.
To work around this issue, correct the bridge VIDs and restart switchd or delete the subinterface.
3.7.12-3.7.15, 4.0.0-4.3.0
2533625
CM-19724
PIM and MSDP entries are set to the internal COS value of 6 so they are grouped together with the bulk traffic priority group in the default traffic.conf file. However, PIM, IGMP, and MSDP are considered control-plane and should be set to the internal COS value of 7.4.0.0-4.3.0
2533337
CM-19454
When you use NCLU to bring a bond admin down (net add bond link down), the bond interface goes into admin down state but the switch ports enslaved to the bond remain UP. If you are using bond-lacp-bypass-allow or balance-xor mode, the host might continue to send traffic. This traffic will be dropped because although the bond slaves are UP, they are not members of the bridge.
To work around this issue, use the sudo ifdown command.
4.0.0-4.3.0
2531273
CM-17494
In certain cases, a peer device sends an ARP request from a source IP address that is not on the connected subnet and the switch creates a STALE neighbor entry. Eventually, the switch attempts to keep the entry fresh and sends ARP requests to the host. If the host responds, the switch has REACHABLE neighbor entries for hosts that are not on the connected subnet.
To work around this issue, change the value of arp_ignore to 2. See [Address Resolution Protocol in the Cumulus Linux user guide|https://docs.cumulusnetworks.com/cumulus-linux/Layer-3/Address-Resolution-Protocol-ARP/] for more information.
4.0.0-4.3.0

Fixed Issues in 4.3.0

Issue IDDescriptionAffects
CM-30832
The Mellanox SN2700 and SN2410 switch intermittently reports PSU fan state changes with Unable to read from device/fan1_input/pwm1 syslog messages.3.7.11-3.7.14, 4.1.1-4.2.1
2597962
CM-31945
Interfaces configured to get an IP address with DHCP try only three times to secure a DHCP lease (instead of retrying indefinitely). If unsuccessful after the third try, the switch stops trying.4.2.1
2595889
CM-31120
In a traditional bridge configuration with ip-forward off, neighbors are synchronized to hardware with a switchd restart but are cleared when you flap the bridge interface.3.7.10-3.7.14.2, 4.0.0-4.2.1
2595816
CM-31222
Tenant VRF BGP peers appear in the EVPN RMAC and nexthop tables, which causes the kernel RMAC to point at invalid IP address.3.7.12-3.7.14.2, 4.0.0-4.2.1
2589747
CM-32226
If switchd successfully signals clagd that it is going down, clagd stops responding to keepalive echo requests from the peer instead of sending a good bye to the peer over both the peerlink and the backup switch. Eventually, the keepalive timer expires and the secondary switch becomes the primary, and brings the bonds and VNIs back up. However, if switchd does not successfully signal it is going down, (in the event of a crash), the primary switch continues to respond to keepalives, and the bonds and VNIs are down on both peers.3.7.12-3.7.14.2, 4.0.0-4.2.1
2556334
CM-33176
On the Mellanox SN-4700 switch, when you use a 2x100G configuration, the links do not come up.
2556279
CM-33160
CVE-2021-3156: A serious heap-based buffer overflow has been discovered in sudo that is exploitable by any local user. It has been given the name Baron Samedit by its discoverer. The bug can be leveraged to elevate privileges to root, even if the user is not listed in the sudoers file. User authentication is not required to exploit the bug.
Vulnerable: <= 1.8.27-1+deb10u2
Fixed: 1.8.27-1+deb10u3
4.0.0-4.2.1
2556218
CM-33117
The following vulnerability affects lldpd:
CVE-2020-27827: A packet that contains multiple instances of certain TLVs will cause lldpd to continually allocate memory and leak the old memory. As an example, multiple instances of system name TLV will cause old values to be dropped by the decoding routine.
Fixed: 1.0.4-0-cl4.3.0u2
3.7.14-3.7.14.2, 4.0.0-4.2.1
2556215
CM-33115
When you run any of the vtysh show bgp ipv4 or show bgp ipv6 statistics commands, the bgpd service crashes.4.2.1
2556012
CM-32994
On Broadcom switches, after repeated VLAN or VXLAN configuration changes, switchd memory might not free up appropriately, which can lead to a crash.3.7.14, 4.0.0-4.2.1
2555761
CM-32860
The following vulnerabilities were announced in the p11-kit (libp11-kit0) packages:
CVE-2020-29361: Multiple integer overflows have been discovered in the array allocations in the p11-kit library and the p11-kit list command, where overflow checks are missing before calling realloc or calloc.
CVE-2020-29362: A heap-based buffer over-read has been discovered in the RPC protocol used by thep11-kit server/remote commands and the client library. When the remote entity supplies a byte array through a serialized PKCS#11 function call, the receiving entity may allow the reading of up to 4 bytes of memory past the heap allocation.
CVE-2020-29363: A heap-based buffer overflow has been discovered in the RPC protocol used by p11-kit server/remote commands and the client library. When the remote entity supplies a serialized byte array in a CK_ATTRIBUTE, the receiving entity may not allocate sufficient length for the buffer to store the deserialized value.
Vulnerable: 0.23.15-2
Fixed: 0.23.15-2_deb10u1
4.0.0-4.2.1
2555691
CM-32829
The NET-SNMP-EXTEND-MIB, disabled in Cumulus Linux 4.2.1 and 3.7.14 to prevent security vulnerability CVE-2020-15862, is re-enabled read-only.3.7.14-3.7.14.2, 4.2.1
2555589
CM-32774
You can’t delete a BGP community list created with NCLU.4.2.1
2555532
CM-32753
QinQ (802.1Q) packets routed to a layer 3 subinterface are still double tagged with the VLAN of the subinterface and the original inner VLAN when they leave the subinterface.4.2.0-4.2.1
2555528
CM-32750
In an EVPN Active/Active configuration, when one of the peers reboots and begins to refresh IP neighbor entries shared by the MLAG peer, some of these ARP messages might be dropped by the MLAG peer’s ARP policer.
To work around this issue, increase the burst value of the ARP policers to 200 or higher.
3.7.14-4.2.1
2555506
CM-32733
CVE-2020-29479 CVE-2020-29480 CVE-2020-29481 CVE-2020-29482 CVE-2020-29483 CVE-2020-29484 CVE-2020-29485 CVE-2020-29486 CVE-2020-29566 CVE-2020-29570 CVE-2020-29571
Several security issues affecting Xenstore could result in cross domain access (denial of service, information leaks or privilege escalation) or denial of service against xenstored.
Additional vulnerabilities could result in guest-to-host denial of
service.
Vulnerable: <= 4.11.4+57-g41a822c392-1
Fixed: 4.11.4+57-g41a822c392-2
4.0.0-4.2.1
2555494
CM-32728
On Broadcom switches, when WARN level switchd log messages are generated, switchd might crash resulting in a core file generated on the system.3.7.14
2555484
CM-32723
ospf6d restarts when you run the NCLU net show ospf6 databse command or the vtysh show ipv6 ospf6 database command.4.2.0-4.2.1
2555428
CM-32683
When you change the SVI vlan-id value in the /etc/network/interfaces file, then run ifreload -a, the 802.1Q ID for the SVI in the kernel does not change.
This operation is not supported in the kernel without recreating the SVI. To apply the change, run ifdown, then ifup for the SVI to recreate the interface.
3.7.13-4.2.1
2555426
CM-32681
Broadcom switches running Cumulus Linux do not support EVPN Multihoming. When a BGP update with EVPN multihoming attributes is received, switchd crashes.
EVPN Multihoming is supported on Mellanox switches only.
4.2.1
2555401
CM-32661
On the Edgecore AS7312 switch, eth0 and swp use the same MAC address.3.7.14-3.7.14.2, 4.0.0-4.2.1
2555380
CM-32647
When you start asic-monitor, you might see increasing memory usage.4.2.1
2555373
CM-32641
CVE-2020-27350: Missing input validation in the ar/tar implementations of APT, the high level package manager, could cause out-of-bounds reads or infinite loops, resulting in denial of service when processing malformed deb files.
CVE-2020-27351: Various memory and file descriptor leaks were discovered in the Python interface to the APT package management runtime library, which could result in denial of service.
Vulnerable: apt <= 1.8.2.1, python-apt <= 1.8.4.1
Fixed: apt 1.8.2.2, python-apt 1.8.4.3
4.0.0-4.2.1
2555339
CM-32622
The following vulnerability has been announced in OpenSSL:
CVE-2020-1971: A flaw in the GENERAL_NAME_cmp() function could cause a NULL dereference when both GENERAL_NAMEs contain an EDIPARTYNAME, resulting in denial of service. More information can be found at https://www.openssl.org/news/secadv/20201208.txt .
Vulnerable: <= 1.1.1d-0+deb10u3
Fixed: 1.1.1d-0+deb10u4
4.0.0-4.2.1
2555270
CM-32592
CVE-2020-27670 CVE-2020-27671 CVE-2020-27672 CVE-2020-27674 CVE-2020-28368: Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, privilege escalation or information leaks.
Vulnerable: < 4.11.4+57-g41a822c392-1
Fixed: 4.11.4+57-g41a822c392-1
4.0.0-4.2.1
2555223
CM-32554
An EVPN route map filter matching a VNI on egress on the originating router might not set a large-community correctly:

route-map TEST-TAG permit 10
match evpn vni 109001
set large-community 20:20:333
!

To work around this issue, remove the VNI match to allow the tag to be applied on egress.
The VNI match works if applied at some other non-originating router either in the ingress or egress direction.
4.2.1
2555183
CM-32532
CVE-2020-8927: A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a “one-shot” decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. If one cannot update to a fixed version, we recommend to use the “streaming” API as opposed to the “one-shot” API, and impose chunk size limits.
Vulnerable: 1.0.7-2
Fixed: 1.0.7-2+deb10u1
4.0.0-4.2.1
2554992
CM-32420
When running traditional mode bridges at scale (for example, when you have more than 200 bridges and a large number of MAC addresses), MLAG bonds flap intermittently from dual to single connected, then back to dual connected, which causes a layer 2 loop and STP state changes.
To work around this issue, either shut down one side of the MLAG bond or prune out VLANS over the bond.
3.7.13-3.7.14.2, 4.0.0-4.2.1
2554982
CM-32412
CVE-2020-28196: MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit.
Vulnerable: 1.17-3
Fixed: 1.17-3+deb10u1
4.0.0-4.2.1
2554866
CM-32329
On the Mellanox SN3420 switch, 1000BaseT and 1000Base-SX/LX modules do not link up.4.2.1
2554834
CM-32311
CVE-2020-25709, CVE-2020-25710: Two vulnerabilities in the certificate list syntax verification and in the handling of CSN normalization were discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. An unauthenticated remote attacker can take advantage of these flaws to cause a denial of service (slapd daemon crash) via specially crafted packets.
Vulnerable: <= 2.4.47+dfsg-3+deb10u3
Fixed: 2.4.47+dfsg-3+deb10u4
4.0.0-4.2.1
2554810
CM-32294
Some non-Mellanox ethernet modules do not link up on the Mellanox SN3420 switch with Cumulus PSID in the Hardware revision. To see if a Mellanox SN3420 switch has the Cumulus PSID, check the output of mlxfwmanager for MSN3420-CxxxC_Ax in the Part Number Field. A Mellanox SN3420 switch with MSN3420-CxxxO_Ax has an Onie PSID and is unaffected by this issue.
To work around this issue, use Mellanox ethernet modules with the Mellanox SN3420 switch,
4.2.1
2554785
CM-32275
After you reboot a Broadcom switch, switchd might fail to restart and you see logs in switchd.log similar to the following:
..
Nov 12 12:20:05.063876 leaf01 switchd[9867]:Nov 12 12:20:05.064310 leaf01 switchd[9867]: hal_bcm_console.c:294 0:system_init:Nov 12 12:20:05.064428 leaf01 switchd[9867]: hal_bcm_console.c:294 system_init: Misc init failed: Operation timed outNov 12 12:20:05.064464 leaf01 switchd[9867]:Nov 12 12:20:05.091995 leaf01 switchd[9867]: hal_bcm_console.c:294 LED: Loading 256 bytes into LED program memoryNov 12 12:20:05.092029 leaf01 switchd[9867]:Nov 12 12:20:05.099547 leaf01 switchd[9867]: hal_bcm_console.c:294 PORT: Error: bcm ports not initializedNov 12 12:20:05.099579 leaf01 switchd[9867]:Nov 12 12:20:05.099646 leaf01 switchd[9867]: hal_bcm_console.c:294 Error: file /var/lib/cumulus/rc.datapath_0: line 81 (error code -1): script terminatedNov 12 12:20:05.099667 leaf01 switchd[9867]:Nov 12 12:20:05.099775 leaf01 switchd[9867]: hal_bcm_console.c:294 Error: file /etc/bcm.d/rc.soc: line 70 (error code -1): script terminatedNov 12 12:20:05.099798 leaf01 switchd[9867]:Nov 12 12:20:05.099871 leaf01 switchd[9867]: hal_bcm_console.c:294 ERROR loading rc script on unit 0Nov 12 12:20:05.099892 leaf01 switchd[9867]:Nov 12 12:20:05.099943 leaf01 switchd[9867]: hal_bcm_console.c:299 CRIT loading of rc script failed, aborting!
To work around this issue, configure Cumulus Linux to boot with the kernel command option ‘intel_iommu=off’:a) Open the file /etc/default/grub with a text editorb) Edit the variable GRUB_CMDLINE_LINUX by adding the string ‘intel_iommu=off’ at the end. For example: GRUB_CMDLINE_LINUX=“cl_platform=cel_e1031 console=ttyS1,115200n8 intel_iommu=off"c) Run the command ‘update-grub’d) Reboot the switch
3.7.11-4.2.1
2554730
CM-32235
In an EVPN multihoming configuration, reloading FRR causes brief traffic loss.4.2.1
2554711
CM-32219
On the Mellanox SN3700C switch, running cl-support with a large number of ports configured can cause switchd to crash.4.2.1
2554707
CM-32215
On the Dell S5048F-ON switch, optical transceivers do not come up and the modules are in reset mode.4.0.0-4.2.1
2554588
CM-32149
If you try to reconfigure a DHCP server after you delete the switch configuration with the net del all command, the dhcpd service fails because a duplicate process is running
To work around this issue, edit the /usr/lib/python2.7/dist-packages/nclu/plugins/dhcp.py file to change:
DHCPD_PID="-pf {0}” 
to:
DHCPD_PID="-pf {1}"
3.7.13-4.2.1
2554531
CM-32110
CVE-2020-25692: A vulnerability in the handling of normalization with modrdn was discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. An unauthenticated remote attacker can use this flaw to cause a denial of service (slapd daemon crash) via a specially crafted packet.
The slapd package is not present in the image or repository, although the OpenLDAP libraries are present.
Vulnerable: <= 2.4.47+dfsg-3+deb10u2
Fixed: 2.4.47+dfsg-3+deb10u3
4.0.0-4.2.1
2554503
CM-32086
If the peer link does not trunk all VLANs on an MLAG bond, all FDB entries learned through that MLAG bond are not redirected over the peer link when the MLAG bond goes down. As a result, traffic destined to the MAC addresses that arrives on the MLAG peer with the downed MLAG port is dropped.
To work around this issue, ensure that the peer link trunks all VLANs that exist on all MLAG bonds.

4.2.0-4.2.1
2554401
CM-32030
On the Mellanox SN4600C switch, the fan speed fluctuates when only one PSU is plugged in.
To work around this issue, use both PSUs.
4.2.1
2554369
CM-32006
Certain Dell S4048-ON switches show an incorrect vendor name and hang when you issue the reboot command.3.7.12-4.2.1
2554334
CM-31982
The INPUT chain POLICE target acts as ACCEPT instead of continue.4.2.1
2554307
CM-31968
The following vulnerability has been announced in freetype:
CVE-2020-15999: Sergei Glazunov discovered a heap-based buffer overflow vulnerability in the handling of embedded PNG bitmaps in FreeType. Opening malformed fonts may result in denial of service or the execution of arbitrary code.
Vulnerable: <= 2.9.1-3+deb10u1
Fixed: 2.9.1-3+deb10u2
4.0.0-4.2.1
2554292
CM-31959
With traditional bridges, a race condition occurs when Cumulus Linux tries to derive MAC addresses.
To work around this issue, use a static MAC address; specify a MAC address in the /etc/network/interfaces file under the bridge’s stanza.
4.2.1
2554282
CM-31954
A security issue was discovered in the MariaDB database server.
Vulnerable: 10.3.25-0
Fixed: 10.3.25-0+deb10u1
4.0.0-4.2.1
2554253
CM-31942
After upgrading the Mellanox SN2410 switch, the FAN is set to full speed.4.2.1
2554246
CM-31936
When you back up and restore a configuration using the conf-backup utility, the switch might hang when rebooted.4.1.1-4.2.1
2554131
CM-31864
CVE-2020-14355: Multiple buffer overflow vulnerabilities were found in the QUIC image decoding process of the SPICE remote display system, before spice-0.14.2-1.
Both the SPICE client (spice-gtk) and server are affected by these flaws. These flaws allow a malicious client or server to send specially crafted messages that, when processed by the QUIC image compression algorithm, result in a process crash or potential code execution.
Vulnerable: 0.14.0-1.3
Fixed: 0.14.0-1.3+deb10u1
4.0.0-4.2.1
2553953
CM-31739
On Mellanox Spectrum based switches running 4.1.0 or higher, if FORWARD chain ACLs are configured on the system, a switch port breakout action applied with a reload of the switchd service may cause switchd to crash.4.2.0-4.2.1
2553878
CM-31697
Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, guest-to-host privilege escalation or information leaks. These include the following:CVE-2020-25595, CVE-2020-25596, CVE-2020-25597, CVE-2020-25599, CVE-2020-25600, CVE-2020-25601, CVE-2020-25602, CVE-2020-25603, CVE-2020-25604.
Vulnerable: < 4.11.4+37-g3263f257ca-1
Fixed: 4.11.4+37-g3263f257ca-1
4.0.0-4.2.1
2553748
CM-31627
On switches with the Spectrum ASIC, the IPv6 default route might be present in the kernel but missing in hardware when IPv6 RAs are received on SVIs configured with ip-forward off.3.7.11-3.7.14.2, 4.2.1
2553743
CM-31623
The next hop for static routes configured in a non-default VRF might be incorrectly flagged as inactive. Remove and reconfigure the static VRF route to recover from this condition.4.2.1
2553732
CM-31618
A ping via a dual-connected bond fails, and the audio stream is not routed or encapsulated through the layer 3 VNI.3.7.12-3.7.13, 4.0.0-4.2.1
2553588
CM-31565
Multicast traffic on a VPN is sent to remote VTEPs that are not part of the VPN and the remote VTEPs receive multicast traffic encapsulated in a VXLAN ID that doesn’t exist.
To work around this issue, disable IGMP snooping on the switch.
3.7.12-3.7.13, 4.0.0-4.2.1
2553568
CM-31560
After a MAC address moves from one remote VTEP to another, the MAC address continues to point to the old VTEP IP address in hardware.4.1.1-4.2.1
2553530
CM-31545
In an MLAG configuration with a layer 3 VNI, when you bounce the peer link, all layer 2 VNIs listed under the layer 3 VNI are duplicated.
To work around this issue, restart FRR with the sudo systemctl restart frr.service command.

3.7.10-3.7.13, 4.1.1-4.2.1
2553468
CM-31512
Digital Optical Monitoring (DOM) Data is displayed incorrectly on SFP fiber modules inserted in the Fiberstore N8500-48B6C, Celestica Questone, and Celestica RedstoneV switches.4.2.0-4.2.1
2553450
CM-31504
On the the Dell N3248-PXE switch, when you insert two PSUs at different times, the newly inserted PSU is detected as OK but the fan and temp sensors are ABSENT.
To work around this issue, remove power to both PSUs at the same time, then reinsert power simultaneously.
3.7.12-3.7.13, 4.2.1
2553349
CM-31469
When you delete a layer 2 VNI and VLAN, the layer 3 VNI reports an incorrect layer 2 VNI number.
To work around this issue, either restart FRR or delete the VNI interface first, then delete the VLAN/SVI.
4.2.0-4.2.1
2553278
CM-31441
Leaked routes are sometimes missing from the destination VRF after a reboot.4.2.0-4.2.1
2553229
CM-31412
On the Dell N3248PXE switch, RJ45 fixed copper ports that auto-negotiate with a 100M or 10M neighbor incorrectly negotiate a half-duplex link that generates errors. Half duplex modes are not supported on this platform.3.7.12-3.7.13, 4.2.1
2553219
CM-31407
You cannot configure SNMPv3 trap-destinations in non-default VRFs with an authentication username that contains fewer than eight characters.3.7.12-4.2.1
2553118
CM-31358
The Dell 100G-LR4 (Innolight) transceiver cannot link up due to a power budget exceeded error on the Mellanox SN4600C switch.4.2.0-4.2.1
2552939
CM-31263
RX_DRP on a bond interface increases without any data traffic while the slave port does not increase.3.7.12-4.2.1
2552881
CM-31238
IPv6 TCP or UDP connections (sourcing from an ephemeral port in the range 34048 to 35071) are not forwarded if the switch has more than one layer 2 VNI defined. The traffic might be locally switched on the bridge and dropped.
To work around this issue, disable ARP/ND suppression to remove the internal ACL rule that affects the ports.
3.7.13, 4.2.1
2552869
CM-31231
On the Dell N3048EP switch, the module information from SFP ports is not displayed in the l1-show command.
To work around this issue, use the ethtool -m command.
3.7.13-4.2.1
2552744
CM-31152
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks
CVE-2020-14351 CVE-2020-29660 CVE-2020-29661 CVE-2020-25704 CVE-2020-28974 CVE-2020-25705 CVE-2020-28915 CVE-2020-25211 CVE-2019-19338 CVE-2020-0305 CVE-2019-18885 CVE-2019-19072 CVE-2020-12652 CVE-2020-24394 CVE-2020-25641 CVE-2019-3874 CVE-2019-5489. (CVE-2020-27825 CVE-2020-29369 CVE-2020-29372 CVE-2020-29534 are not applicable to Cumulus Linux)For the detailed security status of linux, refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux
4.2.0-4.2.1
2552742
CM-31150
On the Mellanox SN2410 switch, you see switchd core and GBIN_MALLOC errors.
To work around this issue, restart switchd.
3.7.12-4.2.1
2552710
CM-31125
The MLAG bonds on a secondary switch do not change to a unique MAC address on the peerlink. As a result, a backup double failure can occur where both peers go down.4.2.0-4.2.1
2552687
CM-31107
When you boot Cumulus VX 4.2 for the first time, ZTP does not execute because it thinks that the /etc/shadow file has been modified. This is due to the default password change implemented in CL 4.2.
To work around this issue, boot the switch, manually change the password, then run sudo ztp -R to reset the ZTP script.
4.2.0-4.2.1
2552528
CM-31028
Ingress SPAN/ERSPAN does not mirror packets when the next hop is EVPN encapsulated.3.7.7-3.7.13, 4.0.0-4.2.1
2552354
CM-30916
On the Mellanox SN4700 switch, you might see Bad signal integrity issues on 200G and 400G ports.4.2.1
2551873
CM-30555
If you have an existing community list of any type, redefining the same sequence number results in the entire community list being deleted.
To work around this issue, delete the community list sequence before trying to adjust it.
4.2.0-4.2.1
2551748
CM-30514
In OVSDB high availability mode, deleting > 200 VLAN bindings might cause ovs-vtepd to crash. Limit the deletion to 200 or fewer VLAN bindings.3.7.12-3.7.13, 4.0.0-4.2.1
2551687
CM-30485
When you run cl-ecmpcalc to determine a hardware hash result, tests might fail.4.2.0-4.2.1
2551422
CM-30361
On Mellanox switches with the Spectrum-2 switch, the lpm-balanced forwarding profile does not work.4.1.1-4.2.1
2551187
CM-30247
dot1qVlanIndex in the dot1qVlanStaticTable of the SNMP Q-BRIDGE-MIB does not use VLAN ID and does not comply with RFC 4363.4.1.1-4.2.1
2551124
CM-30231
When the dynamic or static flag on a bridge fdb (MAC) entry is changed to the opposite state, the new flag is not set appropriately in hardware. This can allow a static fdb entry to be unexpectedly learned dynamically on a different interface, or can prevent a dynamic entry from being updated or learned elsewhere.
This condition can occur during a manual replacement of a local MAC address or when EVPN updates a dynamic MAC address to add or remove the Sticky Mac flag. Either situation results in the MAC address keeping the original flag in hardware.
To work around this issue, delete or withdraw the fdb entry, then add the static MAC address directly. For example:

bridge fdb del 50:6b:4b:ee:ee:ee dev swp31 vlan 24 master
bridge fdb add 50:6b:4b:ee:ee:ee dev swp31 vlan 24 master [ static | dynamic ]

If you are unable to delete an EVPN-learned remote MAC address, you can replace the dynamic MAC address with a local static one, then delete the static MAC address. For example:

bridge fdb replace 50:6b:4b:ee:ee:ee dev swp31 vlan 24 master static
bridge fdb del 50:6b:4b:ee:ee:ee dev swp31 vlan 24 master
bridge fdb add 50:6b:4b:ee:ee:ee dev swp31 vlan 24 master [ static | dynamic ]
4.0.0-4.2.1
2550973
CM-30194
After you enable ROCE with the net add interface storage-optimized pfc command, you cannot verify the command because it is not shown in the net show config command output.4.1.1-4.2.1
2550918
CM-30164
The /usr/share/zoneinfo/leap-seconds.list file expires periodically and results in log messages being generated about that expiration.
To work around this issue, you must update the file from https://www.ietf.org/timezones/data/leap-seconds.list or upgrade the tzdata package to the newest version.
4.0.0-4.2.1
2550906
CM-30159
After you delete a bond, the deleted bond members have the deleted bond MAC address instead of their original MAC address, which might result in traffic being discarded.
To work around this issue, perform a full switch restart.
4.1.1-4.2.1
2550796
CM-30103
On a Broadcom switch with the Trident2+ ASIC, ACL rules for VLANs are not applied after a reboot and the counters remain at zero.
To work around this issue, either do not set acl.non_atomic_update_mode = TRUE in the /etc/cumulus/switchd.conf file or run the cl-acltool -i command after the reboot to install the ACLs.
3.7.12-4.2.1
2550479
CM-29899
VXLAN interface as in-interface or out-interface in an ACL is not supported in Spectrum-based switches.3.7.7-4.2.0
2550375
CM-29838
CPU utilization may increase when clag-managed bond interfaces are operationally/LACP down but the physical carrier remains up on the bond member switchports. This condition occurs when clag bond redirection is enabled and bond members remain up while the parent bond does not negotiate LACP.

This issue is resolved in Cumulus Linux 3.7.14.
3.7.9-3.7.13, 4.0.0-4.2.1
2550348
CM-29829
Due to a known limitation, DHCPv6 snooping is not supported on Mellanox platforms.
Please refer the Mellanox support case
4.2.0-4.2.1
2550276
CM-29779
In LLDP, the snmp subagent loses all subsequent lldpRemSysName (1.0.8802.1.1.2.1.4.1.1.9) entries after an entry with a missing SysName is added.
All the information from lldpctl is correct. Only the entries after the entry that is missing a SysName in lldpRemSysName disappear from the snmp subagent.
3.7.12-4.2.1
2549838
CM-29546
In vtysh, if you configure, then remove a layer 3 VNI for a VRF, the VNI is removed from zebra even if the VNI interface still exists in the kernel.
If you configure a layer 2 VNI as a layer 3 VNI by mistake, removing the layer 3 VNI binding removes it from zebra but EVPN-learned MACs and neighbors are not installed into the kernel.
To work around this issue, delete, then re-add the missing VNI. For example:

cumulus@switch:~$ sudo ifdown vni10100
cumulus@switch:~$ sudo ifup vni10100

If you flap the link with the ip link set vni10100 down; ip link set vni10100 up commands, zebra does not re-add the VNI.
3.7.12-4.2.1
2549784
CM-29520
On Mellanox switches, when the networking service and switchd starts up, a rare condition might occur where switchd crashes and the following log message is generated:

CRIT backend/mlx/hal_mlx_nexthop.c:294: hal_mlx_ecmp_data_reinit: Assertion ‘(num_next_hops)’ failed.
4.1.0-4.2.1
2549226
CM-29259
You might see the following gport error messages in switchd.log:

2020-04-10T19:50:01.011224+09:00 E1PDX0V1ELF0001 6 switchd[925]: hal_bcm_mdb.c:530 gport 0x800007a find failed
2020-04-10T19:50:01.011631+09:00 E1PDX0V1ELF0001 6 switchd[925]: hal_bcm_mdb.c:530 gport 0x8000009 find failed

These messages are harmless and can be ignored.
3.7.12-3.7.14.2, 4.0.0-4.2.1
2548930
CM-29148
On Mellanox Spectrum switches that contain an OSPF IP unnumbered neighborship with a high scale of prefixes being learned, a link flap might cause the neighbor entry to not be programmed in hardware.3.7.11-4.2.1
2548672
CM-29043
When a multipath route that contains an EVPN path exists together with an IPv4 BGP path in the VRF, the RMAC to VTEP binding is incorrect. This invalid entry occurs because Cumulus Linux treats IPv4 routes received over the eBGP IPv4 peering incorrectly in the VRF.
To work around this issue, remove the unnecessary eBGP IPv4 peering.
3.7.12-4.2.1
2548485
CM-28940
If you configure the aggregate-address
summary-only option before injecting a component of the same aggregate into the BGP table with the network or redistribute command, when you remove the aggregate-address configuration, the component stays suppressed; it is not advertised to peers. For example:Existing configuration:
router bgp 1
address-family ipv4 unicast
aggregate-address 50.0.0.0/8 summary-only
exit-address-family
If you add network 50.0.0.1/32, you see the following (expected) BGP table entries:
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R RemovedOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path*> 50.0.0.0 0.0.0.0 32768 is> 50.0.0.1/32 0.0.0.0 0 32768 i
Removing aggregate-address 50.0.0.0/8 summary-only at this point results in the following (unexpected) BGP table entry:
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R RemovedOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Paths> 50.0.0.1/32 0.0.0.0 0 32768 i
To work around this issue, remove, then re-add the component prefix routes.
3.7.12-4.2.1
2548408
CM-28891
net show configuration commands does not show the RoCE net add interface storage-optimized pfc configuration.4.1.0-4.2.1
2547068
CM-28046
Hardware platforms using the Intel D-1500 CPU series might reboot unexpectedly
To work around this issue, contact your hardware vendor to inquire if a new version of BIOS with a microcode fix is available or manually disable CPU C-states in the kernel as outlined below
To permanently disable C-states using a kernel boot parameter:1. Edit /etc/default/grub to add the argument processor.max_cstate=0 to the variable GRUB_CMDLINE_LINUX. For example, if /etc/default/grub file contains the line GRUB_CMDLINE_LINUX=“cl_platform=accton_as7726_32x console=tty0 console=ttyS0,115200n8 intel_iommu=off pcie_aspm=off”, change it to GRUB_CMDLINE_LINUX=“cl_platform=accton_as7726_32x console=tty0 console=ttyS0,115200n8 intel_iommu=off pcie_aspm=off processor.max_cstate=0”2. Run sudo update-grub
3. Reboot the system with sudo reboot
To disable cstates in realtime on the current system, which does not persist through a reboot:1. Confirm that the libpci3 package is installed. Run dpkg-query -l libpci3 and confirm the following line is displayed:ii libpci3:amd64 1:3.2.1-3 amd64 Linux PCI Utilities (shared library)The first field above should read ii. If not, install the libpci3 package by running sudo apt upgrade;sudo apt install libpci3
2. Disable C-states by running the command ./cpupower idle-set -d 2
C-states are disabled by default in Cumulus Linux 4.3.0 and later.
3.7.9-4.2.1
2543647
CM-26137
ERSPAN in ebtables does not work for VNIs. For example, the following rule does not work:

-A FORWARD -i vni10 -j erspan –src-ip 100.1.1.2 –dst-ip 100.1.1.1 –ttl 64
3.7.6-4.2.1
2534978
CM-21055
On the Mellanox switch, the destination MAC address of ERSPAN GRE packets is set to all zeros; therefore, the first transit switch might drop packets.4.0.0-4.2.1