CVE-2023-24511

Public Exploit
On affected platforms running Arista EOS with SNMP configured, a specially crafted packet can cause a memory leak in the snmpd process.

Description

On affected platforms running Arista EOS with SNMP configured, a specially crafted packet can cause a memory leak in the snmpd process. This may result in the snmpd processing being terminated (causing SNMP requests to time out until snmpd is automatically restarted) and potential memory resource exhaustion for other processes on the switch. The vulnerability does not have any confidentiality or integrity impacts to the system.

Remediation

Solution:

  • 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. For more information about upgrading see Eos User Manual: Upgrades and Downgrades CVE-2023-24511 has been fixed in the following releases: 4.29.2F and later releases in the 4.29.x train 4.28.6M and later releases in the 4.28.x train 4.27.9M and later releases in the 4.27.x train 4.26.10M and later releases in the 4.26.x train
  • The following hotfix can be applied to remediate CVE-2023-24511. 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).: 4.29.1F and below releases in the 4.29.x train 4.28.5.1M and below releases in the 4.28.x train 4.27.8.1M and below releases in the 4.27.x train 4.26.9M and below releases in the 4.26.x train Note: Installing/uninstalling the SWIX will cause the snmpd process to restart Version: 1.0 URL:SecurityAdvisory84_CVE-2023-24511_Hotfix.swix SWIX hash:SecurityAdvisory84_CVE-2023-24511_Hotfix.swix (SHA-512)da2bc1fd2c7fc718e3c72c7ce83dc1caa05150cbe2f081c8cc3ed40ce787f7e24dff5202e621ef5f2af89f72afd25f7476d02f722ffe8e8c7d24c101cbbfe0e5

Workaround:

  • If you suspect you are encountering this issue due to malicious activity, the workaround is to enable SNMP service ACLs to only allow specific IP addresses to query SNMP (combined with anti-spoofing ACLs in the rest of the network). snmp-server ipv4 access-list allowHosts4 snmp-server ipv6 access-list allowHosts6 ! ipv6 access-list allowHosts6 10 permit ipv6 host any ! ip access-list allowHosts4 10 permit ip host any

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Vendor Advisory arista.com
Affected: Arista Networks EOS
Published at:
Updated at:

References

Link Tags
https://www.arista.com/en/support/advisories-notices/security-advisory/17239-security-advisory-0084 patch vendor advisory exploit

Frequently Asked Questions

What is the severity of CVE-2023-24511?
CVE-2023-24511 has been scored as a medium severity vulnerability.
How to fix CVE-2023-24511?
To fix CVE-2023-24511: 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. For more information about upgrading see Eos User Manual: Upgrades and Downgrades CVE-2023-24511 has been fixed in the following releases: 4.29.2F and later releases in the 4.29.x train 4.28.6M and later releases in the 4.28.x train 4.27.9M and later releases in the 4.27.x train 4.26.10M and later releases in the 4.26.x train
Is CVE-2023-24511 being actively exploited in the wild?
It is possible that CVE-2023-24511 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-2023-24511?
CVE-2023-24511 affects Arista Networks EOS.
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