CVE-2021-1237 Cisco AnyConnect Secure Mobility Client for Windows DLL Injection Vulnerability
Local authenticated attackers can execute arbitrary code with SYSTEM privileges via DLL injection in Cisco AnyConnect Secure Mobility Client for Windows.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1237?
CVE-2021-1237 is a high-severity code injection vulnerability in Cisco Anyconnect Secure Mobility Client, published on 13 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the Network Access Manager and Web Security Agent components of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL injection 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 inserting a configuration file in a specific path in the system which, in turn, causes a malicious DLL file to be loaded when the application starts. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges.
Weakness: CWE-427
Which versions are affected by CVE-2021-1237?
It affects 1 product.
Products include Cisco Anyconnect Secure Mobility Client.
How do I fix CVE-2021-1237?
No fix has been published for CVE-2021-1237 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2021-1237 being exploited?
There is no known exploitation of CVE-2021-1237 in the wild and no public exploit code.
Other vulnerabilities in Cisco Anyconnect Secure Mobility Client
Sources
Also known as GHSA-656q-3mvc-v648.