#VU105677 Input validation error in Cisco IOS XR - CVE-2025-20142

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Main Vulnerability Database Vulnerabilities #VU105677

#VU105677 Input validation error in Cisco IOS XR - CVE-2025-20142

Published: March 12, 2025


Vulnerability identifier: #VU105677
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-20142
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco IOS XR
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the IPv4 access control list (ACL) feature and quality of service (QoS) policy feature. A remote attacker can send specially crafted IPv4 unicast packets to the system and perform a denial of service (DoS) attack.

This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco IOS XR 64-bit Software and have a vulnerable configuration enabled for any of the installed line cards:

  • ASR 9000 Series Aggregation Services Routers if they have a Lightspeed- or Lightspeed-Plus-based line card installed
  • ASR 9902 Compact High-Performance Routers
  • ASR 9903 Compact High-Performance Routers


Remediation

Install updates from vendor's website.

External links