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Arista EOSFor certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.

Risk 43
Severity
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.

Remedy

The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Artista recommends customers move to the latest version of each release that contains all the fixes listed below. CVE-2021-28510 has been fixed in the following releases: 4.27.2 and later releases in the 4.27.x train 4.26.5 and later releases in the 4.26.x train 4.25.7 and later releases in the 4.25.x train 4.24.9 and later releases in the 4.24.x train 4.23.11 and later releases in the 4.23.x train

Remedy

Hotfix The following hotfix can be applied to remediate CVE-2021-28510 Note: Installing/uninstalling the SWIX will cause the PTP agent to restart. Version: 1.0 URL:SecurityAdvisory76_CVE-2021-28510_Hotfix.swix SWIX hash: (SHA-512)2b78b8274b7c73083775b0327e13819c655db07e22b80038bb3843002c679a798b53a4638c549a86183e01a835377bf262d27e60020a39516a5d215e2fadb437
First published (updated )
CVE-2021-28510

Arista EOSOn affected modular platforms running Arista EOS equipped with both redundant supervisor modules and having the redundancy protocol configured with RPR or SSO, an existing unprivileged user can login to the standby supervisor as a root user, leading t ...

Risk 77
Severity
9.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

On affected modular platforms running Arista EOS equipped with both redundant supervisor modules and having the redundancy protocol configured with RPR or SSO, an existing unprivileged user can login to the standby supervisor as a root user, leading to a privilege escalation. Valid user credentials are required in order to exploit this vulnerability.

Remedy

The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. CVE-2023-24509 has been fixed in the following releases: 4.28.4M and later releases in the 4.28.x train 4.27.7M and later releases in the 4.27.x train 4.26.9M and later releases in the 4.26.x train 4.25.10M and later releases in the 4.25.x train 4.24.11M and later releases in the 4.24.x train

Remedy

The following hotfix can be applied to remediate CVE-2023-24509. The hotfix only applies to the releases listed below and no other releases. All other versions require upgrading to a release containing the fix (as listed above).: 4.28.3M and below releases in the 4.28.x train 4.27.6M and below releases in the 4.27.x train 4.26.8M and below releases in the 4.26.x train 4.25.9M and below releases in the 4.25.x train 4.24.10M 4.23.13M Note: Installing/uninstalling the SWIX will cause ConfigAgent to restart and disconnect existing CLI sessions. Version: 1.0 URL: SecurityAdvisory82_CVE-2023-24509_Hotfix.swix SWIX hash: (SHA-512)7833ab99e11cfea1ec28c09aedffd062cfc865a20a843ee6184caff1081e748c8a02590644d0c7b0e377027379cbaadc8b1a70d1c37097bf98c1bedb429dca56
First published (updated )
CVE-2023-24509

Arista EOSIn EVPN VxLAN setups in Arista EOS, specific malformed packets can lead to incorrect MAC to IP bindi…

Risk 35
Severity
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

In EVPN VxLAN setups in Arista EOS, specific malformed packets can lead to incorrect MAC to IP bindings and as a result packets can be incorrectly forwarded across VLAN boundaries. This can result in traffic being discarded on the receiving VLAN. This affects versions: 4.21.12M and below releases in the 4.21.x train; 4.22.7M and below releases in the 4.22.x train; 4.23.5M and below releases in the 4.23.x train; 4.24.2F and below releases in the 4.24.x train.

First published (updated )
CVE-2020-26569

Arista EOSIn Arista EOS malformed packets can be incorrectly forwarded across VLAN boundaries in one direction…

Risk 27
Severity
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

In Arista EOS malformed packets can be incorrectly forwarded across VLAN boundaries in one direction. This vulnerability is only susceptible to exploitation by unidirectional traffic (ex. UDP) and not bidirectional traffic (ex. TCP). This affects: EOS 7170 platforms version 4.21.4.1F and below releases in the 4.21.x train; EOS X-Series versions 4.21.11M and below releases in the 4.21.x train; 4.22.6M and below releases in the 4.22.x train; 4.23.4M and below releases in the 4.23.x train; 4.24.2.1F and below releases in the 4.24.x train.

First published (updated )
CVE-2020-15898

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