PT-2018-16842 · Arista · Arista Eos

Published 2018-04-05 · Updated 2018-05-18 · CVE-2018-5254

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:N/A:H

Name of the Vulnerable Software and Affected Versions Arista EOS versions prior to 4.20.2F

Description The issue allows remote BGP peers to cause a denial of service by sending an UPDATE message with a malformed path attribute, leading to a restart of the Rib agent. This type of malicious BGP update is not typically expected in production environments and would need to be crafted and sent by a malicious BGP speaker.

Recommendations For versions prior to 4.20.2F, update to version 4.20.2F or later to resolve the issue. As a temporary workaround, consider restricting access to only trusted BGP peers to minimize the risk of exploitation.

Fix

DoS

Weakness Enumeration

CWE-417

Related Identifiers

CVE-2018-5254

Affected Products

Arista Eos

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2018-5254 · Security Note
• https://arista.com/en/support/advisories-notices/security-advisories/4403-security-advisory-33 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-5254 · Vendor Advisory