CVE-2020-3434 Cisco AnyConnect Secure Mobility Client for Windows Denial of Service Vulnerability
A local authenticated attacker can cause a denial of service in Cisco AnyConnect by sending a crafted IPC message.
- 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-2020-3434?
CVE-2020-3434 is a medium-severity denial of service vulnerability in Cisco Anyconnect Secure Mobility Client, published on 17 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process on an affected device. A successful exploit could allow the attacker to stop the AnyConnect process, causing a DoS condition on the device. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.
Weakness: CWE-20
Which versions are affected by CVE-2020-3434?
It affects 1 product.
Products include Cisco Anyconnect Secure Mobility Client.
How do I fix CVE-2020-3434?
No fix has been published for CVE-2020-3434 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-2020-3434 being exploited?
There is no known exploitation of CVE-2020-3434 in the wild and no public exploit code.
Other vulnerabilities in Cisco Anyconnect Secure Mobility Client
Sources
Also known as GHSA-5q29-69jq-443j.