- Vulnerability/
- cisco-sa-multicast-ERMrSvq7
cisco-sa-multicast-ERMrSvq7: Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Denial of Service Vulnerability
First published: Wed Mar 12 2025(Updated: )
A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition.This vulnerability is due to the incorrect handling of malformed IPv4 multicast packets that are received on line cards where the interface has either an IPv4 access control list (ACL) or a QoS policy applied. An attacker could exploit this vulnerability by sending crafted IPv4 multicast packets through an affected device. A successful exploit could allow the attacker to cause line card exceptions or a hard reset. Traffic over that line card would be lost while the line card reloads.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. There are mitigations that address this vulnerability.This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-multicast-ERMrSvq7This advisory is part of the March 2025 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 2025 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XRv 9000 | ||
| Cisco ASR 9000 | ||
| Cisco ASR 9902 Compact High-Performance Router | ||
| Cisco ASR 9903 Compact High-Performance Router |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-multicast-ERMrSvq7?
The severity of cisco-sa-multicast-ERMrSvq7 is considered critical due to the potential for unauthenticated remote code execution.
How do I fix cisco-sa-multicast-ERMrSvq7?
To fix cisco-sa-multicast-ERMrSvq7, you should update your affected Cisco IOS XR Software to the recommended version provided in the security advisory.
What devices are affected by cisco-sa-multicast-ERMrSvq7?
cisco-sa-multicast-ERMrSvq7 impacts Cisco ASR 9000 Series Routers, ASR 9902 Routers, and ASR 9903 Routers running Cisco IOS XR Software.
What type of attack does cisco-sa-multicast-ERMrSvq7 enable?
cisco-sa-multicast-ERMrSvq7 allows an unauthenticated, remote attacker to execute arbitrary commands on affected devices.
Is authentication required to exploit cisco-sa-multicast-ERMrSvq7?
No, authentication is not required to exploit cisco-sa-multicast-ERMrSvq7, making it particularly dangerous.
- collector/cisco-recent
- source/Cisco
- agent/references
- agent/title
- agent/last-modified-date
- agent/severity
- agent/source
- agent/description
- agent/first-publish-date
- agent/type
- agent/event
- agent/softwarecombine
- agent/tags
- agent/guess-ai
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/cisco
- canonical/cisco ios xrv 9000
- canonical/cisco asr 9000
- canonical/cisco asr 9902 compact high-performance router
- canonical/cisco asr 9903 compact high-performance router