CVE-2024-20318 Denial of service in Cisco IOS XR Software
An unauthenticated adjacent attacker can cause a denial of service by sending specific Ethernet frames to devices with Layer 2 services enabled.
- 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-2024-20318?
CVE-2024-20318 is a high-severity denial of service vulnerability in Cisco IOS XR Software, published on 13 Mar 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 Layer 2 Ethernet services of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the line card network processor to reset, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of specific Ethernet frames that are received on line cards that have the Layer 2 services feature enabled. An attacker could exploit this vulnerability by sending specific Ethernet frames through an affected device. A successful exploit could allow the attacker to cause the ingress interface network processor to reset, resulting in a loss of traffic over the interfaces that are supported by the network processor. Multiple resets of the network processor would cause the line card to reset, resulting in a DoS condition.
Weakness: CWE-20
Which versions are affected by CVE-2024-20318?
How do I fix CVE-2024-20318?
No fix has been published for CVE-2024-20318 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-2024-20318 being exploited?
There is no known exploitation of CVE-2024-20318 in the wild and no public exploit code.
Sources
Also known as GHSA-6hgv-w8jj-jm2j.