SB2022040647 - Access control rules bypass in Arista EOS
Published: April 6, 2022 Updated: May 17, 2025
Security Bulletin ID
SB2022040647
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper access control (CVE-ID: CVE-2021-28504)
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to deny rules fail to get applied for packets of size higher than the configured maximum transmission unit (MTU). A remote attacker can bypass implemented security restrictions and gain unauthorized access to the application.
Remediation
Install update from vendor's website.