CVE-2020-3433
Description
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.
Summary dbcve.org
Cisco AnyConnect Secure Mobility Client for Windows contains a DLL hijacking vulnerability in its interprocess communication (IPC) channel. The application insufficiently validates resources loaded at runtime, allowing an authenticated local attacker to send a crafted IPC message and load a malicious DLL, resulting in arbitrary code execution with SYSTEM privileges.
Mitigation
Apply the vendor patch from Cisco when available. Until then, restrict local access to systems with AnyConnect installed and monitor for suspicious DLL loading activity in the AnyConnect process.