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.
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. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
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
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Affected Versions
Cisco AnyConnect Secure Mobility Client Version n/a is affected by CVE-2020-3433Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.