Vulnerability · Published Sep 30, 2022 · Assigned by cisco
CVE-2022-20728Cisco Access Points VLAN Bypass from Native VLAN Vulnerability
Medium 4.7
In plain English
A medium-severity improper access control in Cisco Aironet Access Point Software (IOS XE Controller) from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).
Official description
A vulnerability in the client forwarding code of multiple Cisco Access Points (APs) could allow an unauthenticated, adjacent attacker to inject packets from the native VLAN to clients within nonnative VLANs on an affected device. This vulnerability is 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. An attacker could exploit this vulnerability by obtaining access to the native VLAN and directing traffic directly to the client through their MAC/IP combination. A successful exploit could allow the attacker to bypass VLAN separation and potentially also bypass any Layer 3 protection mechanisms that are deployed.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Aironet Access Point Software (IOS XE Controller) | n/a |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
References
- 20220927 Cisco Access Points VLAN Bypass from Native VLAN Vulnerability vendor-advisory, x_refsource_CISCO