CVE-2023-20241 Memory corruption in Cisco Secure Client
An authenticated local attacker can crash the VPN Agent service by sending crafted packets, causing a denial of service for all users.
- 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-2023-20241?
CVE-2023-20241 is a medium-severity memory corruption vulnerability in Cisco Anyconnect Secure Mobility Client, published on 22 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Multiple vulnerabilities in Cisco Secure Client Software, formerly AnyConnect Secure Mobility Client, could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected system. These vulnerabilities are due to an out-of-bounds memory read from Cisco Secure Client Software. An attacker could exploit these vulnerabilities by logging in to an affected device at the same time that another user is accessing Cisco Secure Client on the same system, and then sending crafted packets to a port on that local host. A successful exploit could allow the attacker to crash the VPN Agent service, causing it to be unavailable to all users of the system. To exploit these vulnerabilities, the attacker must have valid credentials on a multi-user system.
Weakness: CWE-125
Which versions are affected by CVE-2023-20241?
It affects 2 products.
Products include Cisco Anyconnect Secure Mobility Client, Cisco Secure Client.
How do I fix CVE-2023-20241?
No fix has been published for CVE-2023-20241 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-20241 being exploited?
There is no known exploitation of CVE-2023-20241 in the wild and no public exploit code.
Other vulnerabilities in Cisco Anyconnect Secure Mobility Client
Sources
Also known as GHSA-23qx-pfmx-49j9.