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 unauthenticat…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Ios | Versions 15.0\(1\)ex, 15.1\(1\)sy, 15.1\(1\)sy1, 15.1\(1\)sy2, 15.1\(1\)sy3, 15.1\(1\)sy4 |
| Cisco | Ios Xe | Versions 3.2.0se, 3.2.1se, 3.2.2se, 3.2.3se, 3.3.0se, 3.3.0xo |