CVE-2021-28511

MEDIUM

5.8

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.

CVE Details

CVSS v3.1 Score5.8

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published8/5/2022

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

arista:7050cx3-32sarista:7050cx3m-32sarista:7050sx3-48c8arista:7050sx3-48ycarista:7050sx3-48yc12arista:7050sx3-48yc8arista:7050sx3-96yc8arista:7050tx3-48c8arista:720xp-24y6arista:720xp-24zy4arista:720xp-48y6arista:720xp-48zc2arista:720xp-96zc2arista:7300x3-32carista:7300x3-48yc4arista:eos

Weaknesses (CWE)

CWE-284

References

https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078(psirt@arista.com)

https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.