cisco-sa-anyconnect-dos-55AYyxYr: Cisco AnyConnect Secure Mobility Client Denial of Service Vulnerability
First published: Wed Feb 24 2021(Updated: )
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the device. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending one or more crafted IPC messages to the AnyConnect process on an affected device. A successful exploit could allow the attacker to stop the AnyConnect process, causing a DoS condition on the device. Note: The process under attack will automatically restart so no action is needed by the user or admin. 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-anyconnect-dos-55AYyxYr
Credit: Gerbert Roitburd Secure Mobile Networking Lab
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco AnyConnect Secure |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-anyconnect-dos-55AYyxYr?
The severity of cisco-sa-anyconnect-dos-55AYyxYr is classified as high due to its potential to cause a denial of service condition.
How do I fix cisco-sa-anyconnect-dos-55AYyxYr?
To fix cisco-sa-anyconnect-dos-55AYyxYr, update the Cisco AnyConnect Secure Mobility Client to the latest version provided by Cisco.
Who is affected by cisco-sa-anyconnect-dos-55AYyxYr?
Devices running vulnerable versions of the Cisco AnyConnect Secure Mobility Client are affected by cisco-sa-anyconnect-dos-55AYyxYr.
What type of attack does cisco-sa-anyconnect-dos-55AYyxYr allow?
cisco-sa-anyconnect-dos-55AYyxYr allows an authenticated, local attacker to exploit the vulnerability and cause a denial of service.
Is user authentication required to exploit cisco-sa-anyconnect-dos-55AYyxYr?
Yes, user authentication is required to exploit the vulnerability described in cisco-sa-anyconnect-dos-55AYyxYr.
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