CVE-2025-20145

Description

A vulnerability in the access control list (ACL) processing in the egress direction of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability exists because certain packets are handled incorrectly when they are received on an ingress interface on one line card and destined out of an egress interface on another line card where the egress ACL is configured. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an egress ACL on the affected device. For more information about this vulnerability, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Reserved 2024-10-10 | Published 2025-03-12 | Updated 2025-03-12 | Assigner cisco

Problem types

Permissions, Privileges, and Access Control

Product status

Default status
unknown

6.5.3
affected

6.5.2
affected

6.5.92
affected

6.5.1
affected

6.6.2
affected

7.0.1
affected

6.6.25
affected

6.6.1
affected

6.5.93
affected

7.1.1
affected

7.0.90
affected

6.6.3
affected

7.0.2
affected

7.2.1
affected

7.1.2
affected

7.0.11
affected

7.0.12
affected

7.0.14
affected

6.6.4
affected

7.2.12
affected

7.3.1
affected

7.4.1
affected

7.2.2
affected

7.3.15
affected

7.3.16
affected

7.3.2
affected

7.5.1
affected

7.6.1
affected

7.5.2
affected

7.8.1
affected

7.5.12
affected

7.7.1
affected

7.3.3
affected

7.4.2
affected

7.3.4
affected

7.6.2
affected

7.5.3
affected

7.7.2
affected

7.9.1
affected

7.10.1
affected

7.8.2
affected

7.5.4
affected

7.8.22
affected

7.7.21
affected

7.9.2
affected

7.3.5
affected

7.5.5
affected

7.11.1
affected

7.10.2
affected

24.1.1
affected

7.3.6
affected

7.11.2
affected

24.2.1
affected

24.1.2
affected

24.2.11
affected

24.3.1
affected

24.4.1
affected

24.2.2
affected

7.11.21
affected

24.2.20
affected

24.3.2
affected

References

sec.cloudapps.cisco.com/...ory/cisco-sa-modular-ACL-u5MEPXMm (cisco-sa-modular-ACL-u5MEPXMm)

blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/ (Crafting endless AS-PATHS in BGP)

cve.org (CVE-2025-20145)

nvd.nist.gov (CVE-2025-20145)

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