Cisco IOS XR Software MPLS and Pseudowire Interfaces Access Control List Bypass Vulnerabilities

Multiple vulnerabilities in the IP access control list (ACL) processing in the ingress direction on MPLS and Pseudowire (PW) interfaces of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL.

For more information about these vulnerabilities, see the Details [“#details”] section of this advisory.

Cisco has released software updates that address these vulnerabilities. There are workarounds that address CVE-2024-20315. There are no workarounds that address CVE-2024-20322.

This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-acl-bypass-RZU5NL3e [“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-acl-bypass-RZU5NL3e”]

This advisory is part of the March 2024 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: March 2024 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication [“https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75299”].