Headline
CVE-2023-20056: Cisco Security Advisory: Cisco Access Point Software Denial of Service Vulnerability
A vulnerability in the management CLI of Cisco access point (AP) software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of commands supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to cause an affected device to reload spontaneously, resulting in a DoS condition.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
Fixed Releases
At the time of publication, the release information in the following tables was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
The left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability that is described in this advisory and which release included the fix for this vulnerability.
APs Managed by Wireless LAN Controller (WLC) or Mobility Express (ME)
Cisco Wireless LAN Controller Software Release
First Fixed Release
8.9 and earlier
Migrate to a fixed release.
8.10
8.10.181.01
1\. Release 8.10.181.0 has been deferred. Cisco recommends upgrading to Release 8.10.183.0.
**APs Managed by Catalyst 9800 Series Wireless Controller or Embedded Wireless Controller (EWC)**
Cisco Catalyst 9800 Series Wireless Controller Software Release
First Fixed Release
16.11 and earlier
Migrate to a fixed release.
16.12
16.12.8
17.1
Migrate to a fixed release.
17.2
Migrate to a fixed release.
17.3
17.3.6
17.4
Migrate to a fixed release.
17.5
Migrate to a fixed release.
17.6
17.6.5
17.7
Migrate to a fixed release.
17.8
Migrate to a fixed release.
17.9
17.9.2
17.10 and later
Not vulnerable.
The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.