IPSec restrictions bypass in Arista EOS

1) Improper access control

EUVDB-ID: #VU109872

Risk: Medium

CVSSv4.0: 2.7 [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]

CVE-ID: CVE-2025-2796

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to improper access restrictions on platforms with hardware IPSec support and anti-replay protection configured. A remote attacker can send duplicate encrypted packets that will be forwarded instead of being dropped.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Arista Extensible Operating System (EOS): before

CPE2.3

• cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*

External links

https://www.arista.com/en/support/advisories-notices/security-advisory/21413-security-advisory-0119

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.