SB2022092750 - VLAN separation bypass in Cisco Access Points

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Main Vulnerability Database SB2022092750

SB2022092750 - VLAN separation bypass in Cisco Access Points

Published: September 27, 2022

Security Bulletin ID SB2022092750
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2022-20728)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to a logic error on the AP that forwards packets that are destined to a wireless client if they are received on the native VLAN. A remote non-authenticated attacker on the local network with access to the native VLAN can direct traffic directly to the client through their MAC/IP combination, and as a result bypass VLAN separation and potentially also bypass any Layer 3 protection mechanisms that are deployed.


Remediation

Install update from vendor's website.

References