CVE-2024-20317 Cisco IOS XR Software Layer 2 Services Denial of Service Vulnerability
An unauthenticated adjacent attacker can cause a denial of service by sending specific Ethernet frames to Cisco IOS XR devices, disrupting control plane protocols.
- 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-2024-20317?
CVE-2024-20317 is a high-severity denial of service vulnerability in Cisco Ios Xr, published on 11 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 handling of specific Ethernet frames by Cisco IOS XR Software for various Cisco Network Convergence System (NCS) platforms could allow an unauthenticated, adjacent attacker to cause critical priority packets to be dropped, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect classification of certain types of Ethernet frames that are received on an interface. An attacker could exploit this vulnerability by sending specific types of Ethernet frames to or through the affected device. A successful exploit could allow the attacker to cause control plane protocol relationships to fail, resulting in a DoS condition. For more information, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Weakness: CWE-684
Which versions are affected by CVE-2024-20317?
It affects 1 product.
Products include Cisco Ios Xr.
How do I fix CVE-2024-20317?
No fix has been published for CVE-2024-20317 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-2024-20317 being exploited?
There is no known exploitation of CVE-2024-20317 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios Xr
- CVE-2020-3118 Cisco IOS XR Software Discovery Protocol Format String
- CVE-2020-3569 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2020-3566 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2010-3035 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service
- CVE-2022-20821 Cisco IOS XR Open Port
Sources
Also known as GHSA-qcxf-jg3p-ww69.