SB20230719127 - Access control rules bypass in Arista EOS
Published: July 19, 2023 Updated: May 17, 2025
Security Bulletin ID
SB20230719127
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Security features bypass (CVE-ID: CVE-2021-28511)
CWE-ID: CWE-254 - Security Features
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass implemented ACL rules.
The vulnerability exists due to an error when handling traffic if a NAT ACL rule filter with permit action matches the packet flow. A remote attacker can bypass ACL rules.
Remediation
Install update from vendor's website.