CVE-2021-1567: Cisco AnyConnect Secure Mobility Client for Windows with VPN Posture (HostScan) Module DLL Hijacking Vulnerability
First published: Wed Jun 16 2021(Updated: )
A vulnerability in the DLL loading mechanism of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device if the VPN Posture (HostScan) Module is installed on the AnyConnect client. This vulnerability is due to a race condition in the signature verification process for DLL files that are loaded on an affected device. An attacker could exploit this vulnerability by sending a series of crafted interprocess communication (IPC) messages to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected device with SYSTEM privileges. To exploit this vulnerability, the attacker must have valid credentials on the Windows system.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Anyconnect Secure Mobility Client | <4.10.01075 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Cisco AnyConnect Secure Mobility Client vulnerability?
The vulnerability ID for this Cisco AnyConnect Secure Mobility Client vulnerability is CVE-2021-1567.
What is the severity of CVE-2021-1567?
The severity of CVE-2021-1567 is high.
What is the affected software for CVE-2021-1567?
The affected software for CVE-2021-1567 is Cisco AnyConnect Secure Mobility Client for Windows version up to and excluding 4.10.01075.
What is the description of CVE-2021-1567?
CVE-2021-1567 is a vulnerability in the DLL loading mechanism of Cisco AnyConnect Secure Mobility Client for Windows that could allow a local attacker to perform a DLL hijacking attack if the VPN Posture (HostScan) Module is installed.
How can I fix CVE-2021-1567?
To fix CVE-2021-1567, update Cisco AnyConnect Secure Mobility Client to version 4.10.01075 or later.
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