cisco-sa-20180502-wlc-mfdos: Cisco Wireless LAN Controller 802.11 Management Frame Denial of Service Vulnerability
First published: Wed May 02 2018(Updated: )
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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-mfdos
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Wireless LAN Controllers |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20180502-wlc-mfdos?
The severity of cisco-sa-20180502-wlc-mfdos is classified as high due to its potential for causing a denial of service.
How do I fix cisco-sa-20180502-wlc-mfdos?
To fix cisco-sa-20180502-wlc-mfdos, apply the latest security patches provided by Cisco for the affected Wireless LAN Controller.
What conditions are required for cisco-sa-20180502-wlc-mfdos to be exploited?
cisco-sa-20180502-wlc-mfdos can be exploited by an unauthenticated adjacent attacker with access to the network.
What is the impact of cisco-sa-20180502-wlc-mfdos?
The impact of cisco-sa-20180502-wlc-mfdos is that it allows an attacker to cause the affected device to reload unexpectedly, resulting in a denial of service.
Which devices are affected by cisco-sa-20180502-wlc-mfdos?
cisco-sa-20180502-wlc-mfdos affects Cisco Wireless LAN Controllers that utilize the 802.11 frame validation functionality.
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