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Cisco Wireless LAN Controller AireOS Software Denial of Service Vulnerability

cisco-sa-cbw-dos-YSmbUqX3 · Medium · Published · Updated

A vulnerability in the memory buffer of Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause memory leaks that could eventually lead to a device reboot. This vulnerability is due to memory leaks caused by multiple clients connecting under specific conditions. An attacker could exploit this vulnerability by causing multiple wireless clients to attempt to connect to an access point (AP) on an affected device. A successful exploit could allow the attacker to cause the affected device to reboot after a significant amount of time, resulting in a denial of service (DoS) condition. Cisco has released software updates that address this vulnerability. There is a workaround that addresses this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3

Cisco advisory ·CSAF JSON

Workarounds

There is a workaround that addresses this vulnerability. Administrators can disable the Random Mac Filtering feature on the affected device using the following CLI command:

3500-3-AX (config-wlan)# no local-admin-mac deny

While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.

CVEsCVE-2023-20251
Cisco Bug IDsCSCwe32125
CVSS ScoreBase 6.1
Base 6.1 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
Product Names From Source
Cisco Wireless LAN Controller (WLC), Cisco Mobility Express, Cisco Wireless LAN Controller (WLC) 8.10.162.0, Cisco Wireless LAN Controller (WLC) 8.10.151.0, Cisco Wireless LAN Controller (WLC) 8.10.171.0, Cisco Wireless LAN Controller (WLC) 8.10.170.0, Cisco Wireless LAN Controller (WLC) 8.10.181.0, Cisco Wireless LAN Controller (WLC) 8.10.182.0, Cisco Wireless LAN Controller (WLC) 8.10.183.0, Cisco Wireless LAN Controller (WLC) 8.10.185.0, Cisco Virtual Wireless Controller

Related Products

Product CVE Evidence