NULL pointer dereference in Cisco iOS Xe Software
CVE-2024-20312
A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) protocol of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation when parsing an ingress IS-IS packet. An attacker could exploit this vulnerability by sending a crafted IS-IS packet to an affected device after forming an adjacency. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. Note: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device and have formed an adjacency.
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: 0.003 (15.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
- Cisco iOS Xe Software — versions 3.7.0S, 3.7.1S, 3.7.2S
- Cisco iOS — versions 15.2(7)e2, 15.2\(4\)ea6, 15.6\(2\)sp7
- Cisco iOS Xe — versions 3.2.0se, 3.2.1se, 3.2.2se
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2024-20312?
- CVE-2024-20312 is a high-severity vulnerability in Cisco iOS Xe Software, classified under NULL Pointer Dereference. CVSS score: 7.4/10. Published 2024-03-27.
- How severe is CVE-2024-20312?
- High severity. CVSS v3 base score is 7.4 out of 10.