CVE-2021-28511

 

Published at: - 05-08-2022 07:15

Last modified: - 15-08-2022 10:50

Total changes: - 3

Description

This advisory documents the impact of an internally found vulnerability in Arista EOS for security ACL bypass. The impact of this vulnerability is that the security ACL drop rule might be bypassed if a NAT ACL rule filter with permit action matches the packet flow. This could allow a host with an IP address in a range that matches the range allowed by a NAT ACL and a range denied by a Security ACL to be forwarded incorrectly as it should have been denied by the Security ACL. This can enable an ACL bypass.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

 

Verification logic

 

Reference

• https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078

 

Keywords

NVD

 

CVE-2021-28511

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures