A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client Software could allow an authenticated, local attacker to cause a targeted AnyConnect user to execute a malicious script. The vulnerability is due to a lack of authentication to the IPC listener. An attacker could exploit this vulnerability by sending crafted IPC messages to the AnyConnect client IPC listener. A successful exploit could allow an attacker to cause the targeted AnyConnect user to execute a script. This script would execute with the privileges of the targeted AnyConnect user. In order to successfully exploit this vulnerability, there must be an ongoing AnyConnect session by the targeted user at the time of the attack. To exploit this vulnerability, the attacker would also need valid user credentials on the system upon which the AnyConnect client is being run. Cisco has not released software updates that address this vulnerability.

According to its self-reported version, Cisco AnyConnect Secure Mobility Client is affected by a arbitrary code execution vulnerability. The vulnerability is due to a lack of authentication to the IPC listener. An authenticated, local attacker could exploit this vulnerability by sending crafted IPC messages to the AnyConnect client IPC listener.
A successful exploit could allow an attacker to cause the targeted AnyConnect user to execute a malicious script. This script would execute with the privileges of the targeted AnyConnect user.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

ID	Name	Product	Family	Severity
156549	Linux: Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution (cisco-sa-anyconnect-ipc-KfQO9QhK)	Nessus	Misc.	high
148656	MacOSX: Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution (cisco-sa-anyconnect-ipc-KfQO9QhK)	Nessus	MacOS X Local Security Checks	high
148655	Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution (cisco-sa-anyconnect-ipc-KfQO9QhK)	Nessus	Windows	high

Detections

Analytics

CVE-2020-3556

high

Tenable Plugins

high

high

high