cisco anyconnect-secure-mobility-client CVE-2020-3433 is a vulnerability in Cisco Anyconnect Secure Mobility Client
Published on August 17, 2020

A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.

Vendor Advisory NVD

Known Exploited Vulnerability

This Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Cisco AnyConnect Secure Mobility Client for Windows interprocess communication (IPC) channel allows for insufficient validation of resources that are loaded by the application at run time. An attacker with valid credentials on Windows could execute code on the affected machine with SYSTEM privileges.

The following remediation steps are recommended / required by November 14, 2022: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2020-3433 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 1.8 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.

What is a DLL preloading Vulnerability?

The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.

CVE-2020-3433 has been classified to as a DLL preloading vulnerability or weakness.


Products Associated with CVE-2020-3433

You can be notified by stack.watch whenever vulnerabilities like CVE-2020-3433 are published in these products:

Cisco Anyconnect Secure Mobility Client
 

What versions of Anyconnect Secure Mobility Client are vulnerable to CVE-2020-3433?