CVE-2021-1568 Cisco AnyConnect Secure Mobility Client for Windows Denial of Service Vulnerability
A local authenticated attacker can crash the Cisco AnyConnect VPN Agent service by placing a crafted file in a specific folder, causing denial of service.
- 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-2021-1568?
CVE-2021-1568 is a medium-severity denial of service vulnerability in Cisco Anyconnect Secure Mobility Client, published on 16 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected system. This vulnerability is due to uncontrolled memory allocation. An attacker could exploit this vulnerability by copying a crafted file to a specific folder on the system. A successful exploit could allow the attacker to crash the VPN Agent service when the affected application is launched, causing it to be unavailable to all users of the system. To exploit this vulnerability, the attacker must have valid credentials on a multiuser Windows system.
Weakness: CWE-789
Which versions are affected by CVE-2021-1568?
It affects 1 product.
Products include Cisco Anyconnect Secure Mobility Client.
How do I fix CVE-2021-1568?
No fix has been published for CVE-2021-1568 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-1568 being exploited?
There is no known exploitation of CVE-2021-1568 in the wild and no public exploit code.
Other vulnerabilities in Cisco Anyconnect Secure Mobility Client
Sources
Also known as GHSA-v9xf-fr6m-f93p.