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Cisco AnyConnect Secure Mobility Client 2.0.0343 through 4.1.0 DLL Side Loading Local Privilege Escalation

High

Synopsis

Cisco AnyConnect Secure Mobility Client 2.0.0343 through 4.1.0 for Windows contains a vulnerability that could allow an authenticated, local attacker to gain elevated privileges.

Description

A vulnerability in Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to execute an arbitrary executable file with privileges equivalent to the Microsoft Windows operating system SYSTEM account.

The vulnerability is due to lack of checks in the code for the path to the downloader application and associated DLLs. An attacker could exploit this vulnerability by executing the downloader application from outside its expected location and providing a set of crafted DLLs. A successful exploit could allow the attacker to execute commands on the underlying Microsoft Windows host with privileges equivalent to the SYSTEM account.

Functional code that exploits this vulnerability is publicly available.

Solution

We are not currently aware of a solution for this vulnerability.