SB2022020232 - Authorization bypass in Arista EOS eAPI
Published: February 2, 2022 Updated: May 17, 2025
Security Bulletin ID
SB2022020232
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authorization (CVE-ID: CVE-2021-28503)
CWE-ID: CWE-285 - Improper Authorization
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to bypass authorization.
The vulnerability exists due to an error in the eAPI implementation that may skip re-evaluating user credentials when certificate based authentication is used. A remote attacker can bypass authorization checks and gain access to the system.
Remediation
Install update from vendor's website.