CVE-2024-20496 Cisco SD-WAN vEdge Routers Denial of Service Vulnerability
An unauthenticated adjacent attacker can cause a denial of service by sending crafted UDP packets to Cisco SD-WAN vEdge routers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-20496?
CVE-2024-20496 is a medium-severity denial of service vulnerability in Cisco SD-WAN vEdge Cloud, published on 25 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the UDP packet validation code of Cisco SD-WAN vEdge Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected system. This vulnerability is due to incorrect handling of a specific type of malformed UDP packet. An attacker in a machine-in-the-middle position could exploit this vulnerability by sending crafted UDP packets to an affected device. A successful exploit could allow the attacker to cause the device to reboot, resulting in a DoS condition on the affected system.
Weakness: CWE-787
Which versions are affected by CVE-2024-20496?
How do I fix CVE-2024-20496?
No fix has been published for CVE-2024-20496 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-2024-20496 being exploited?
There is no known exploitation of CVE-2024-20496 in the wild and no public exploit code.
Sources
Also known as GHSA-3phf-8x93-jmv2.