PT-2024-10399 · Cisco · Cisco Ios Xr

Prathap Raju Hongere Devaraju

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Published

2024-09-11

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Updated

2024-10-07

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CVE-2024-20406

CVSS v3.1

7.4

High

VectorAV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software (affected versions not specified)
Description A vulnerability in the segment routing feature for the Intermediate System-to-Intermediate System (IS-IS) protocol 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 of ingress IS-IS packets. An attacker could exploit this vulnerability by sending specific IS-IS packets to an affected device after forming an adjacency. A successful exploit could allow the attacker to cause the IS-IS process on all affected devices that are participating in the Flexible Algorithm to crash and restart, resulting in a DoS condition. The IS-IS protocol is a routing protocol, and to exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device and must have formed an adjacency. This vulnerability affects segment routing for IS-IS over IPv4 and IPv6 control planes as well as devices that are configured as level 1, level 2, or multi-level routing IS-IS type.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2025-00915
CVE-2024-20406

Affected Products

Cisco Ios Xr