PT-2024-18646 · Cisco · Cisco Ios Xe+1

Published 2024-03-27 · Updated 2025-06-30 · CVE-2024-20312

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

AV: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 Software and Cisco IOS XE Software (affected versions not specified)

Description A vulnerability in 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 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. 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 have formed an adjacency.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2024-20312

Affected Products

Cisco Ios

Cisco Ios Xe

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2024-20312 · Security Note
• https://osv.dev/vulnerability/CVE-2024-20312 · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-isis-sGjyOUHX · Vendor Advisory
• https://t.me/cvenotify/100292 · Telegram Post
• https://t.me/cvenotify/127119 · Telegram Post
• https://twitter.com/CVEnew/status/1773096356305088631 · Twitter Post