Cisco Wireless LAN Controller 802.11 Management Frame Denial of Service Vulnerability
by CIRT Team
Description: A vulnerability in the 802.11 frame validation functionality of the Cisco Wireless LAN Controller (WLC) could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.
The vulnerability is due to incomplete input validation of certain 802.11 management information element frames that an affected device receives from wireless clients. An attacker could exploit this vulnerability by sending a malformed 802.11 management frame to an affected device. A successful exploit could allow the attacker to cause the affected device to reload unexpectedly, resulting in a DoS condition.
Impact: Denial of service (DoS) condition.
Vulnerable Products
This vulnerability affects only Cisco Wireless LAN Controllers that are running Cisco Mobility Express Release 8.5.103.0.
Mitigation: Cisco has released software updates that address this vulnerability. Please see the references or vendor advisory for more information.
Reference URL’s:
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-mfdos
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-0235
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