Vulnerability in Cisco iOS Xr Software
CVE-2024-20317
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (13.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Cisco iOS Xr Software — versions 7.7.1, 7.8.1, 7.7.2
- Cisco iOS Xr — versions 7.7.1, 7.7.2, 7.7.21
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2024-20317?
- CVE-2024-20317 is a high-severity vulnerability in Cisco iOS Xr Software, classified under CWE-684. CVSS score: 7.4/10. Published 2024-09-11.
- How severe is CVE-2024-20317?
- High severity. CVSS v3 base score is 7.4 out of 10.