CVE-2023-24509

Public Exploit
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 t ...

Description

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.

Remediation

Solution:

  • 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
  • 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

Workaround:

  • The workaround is to disable “ssh” CLI command in unprivileged mode on the SSH client devices by using command authorization. This can be done with Role-Based Access Control (RBAC). If the “ssh” CLI command is currently used to connect to a remote host, the destination address can be added to an allowlist with RBAC.

Category

9.3
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.05%
Vendor Advisory arista.com
Affected: Arista Networks Arista EOS
Published at:
Updated at:

References

Link Tags
https://www.arista.com/en/support/advisories-notices/security-advisory/16985-security-advisory-0082 vendor advisory mitigation exploit

Frequently Asked Questions

What is the severity of CVE-2023-24509?
CVE-2023-24509 has been scored as a critical severity vulnerability.
How to fix CVE-2023-24509?
To fix CVE-2023-24509: 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
Is CVE-2023-24509 being actively exploited in the wild?
It is possible that CVE-2023-24509 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-24509?
CVE-2023-24509 affects Arista Networks Arista EOS.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.