SB2022093007 - Improper access control in Cisco Access Points
Published: September 30, 2022 Updated: December 12, 2022
Security Bulletin ID
SB2022093007
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
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-2021-27854)
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in the Layer 2 network filtering capabilities such as IPv6 RA guard. A remote attacker on the local network can bypass these capabilities using a combination of VLAN 0 headers, LLC/SNAP headers in Ethernet to Wifi frame translation and in the reverse-Wifi to Ethernet.
Remediation
Install update from vendor's website.