PT-2022-9897 · Arista · Arista Eos

Published 2022-03-29 · Updated 2022-04-26 · CVE-2021-28505

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Arista EOS (affected versions not specified)

Description On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol. This issue was discovered internally and Arista is not aware of any malicious uses of this issue in customer networks.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Access Control

Incorrect Authorization

Weakness Enumeration

CWE-284

CWE-863

Related Identifiers

CVE-2021-28505

Affected Products

Arista Eos

References · 5

• 🔥 https://arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073 · Exploit
• https://osv.dev/vulnerability/CVE-2021-28505 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-28505 · Security Note
• https://t.me/cibsecurity/40817 · Telegram Post
• https://t.me/cvenotify/29323 · Telegram Post