cisco-sa-lsplus-Z6AQEOjk: Cisco IOS XR Software for ASR 9000 Series Routers Lightspeed-Plus Line Cards Denial of Service Vulnerability
First published: Wed Apr 13 2022(Updated: )
A vulnerability in the data plane microcode of Lightspeed-Plus line cards 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 the line card to reset. This vulnerability is due to the incorrect handling of malformed packets that are received on the Lightspeed-Plus line cards. An attacker could exploit this vulnerability by sending a crafted IPv4 or IPv6 packet through an affected device. A successful exploit could allow the attacker to cause the Lightspeed-Plus line card to reset, resulting in a denial of service (DoS) condition for any traffic that traverses that line card. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lsplus-Z6AQEOjk This advisory is part of the April 2022 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: April 2022 Cisco IOS XR Software Security Advisory Bundled Publication.
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XR Software | ||
| Cisco IOS XR Software | =7.1.3<ASR9K-X64=7.1.2<ASR9K-X64 | ASR9K-X64 ASR9K-X64 |
| Cisco IOS XR Software | =7.1.2<ASR9K-X64 | ASR9K-X64 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of Cisco IOS XR Software for ASR 9000 Series Routers Lightspeed-Plus Line Cards Denial of Service Vulnerability?
The vulnerability ID is cisco-sa-lsplus-Z6AQEOjk.
What is the severity level of cisco-sa-lsplus-Z6AQEOjk vulnerability?
The severity level of the vulnerability is high with a CVSS score of 8.6.
Which line cards are affected by the Cisco IOS XR Software for ASR 9000 Series Routers Lightspeed-Plus Line Cards Denial of Service Vulnerability?
Lightspeed-Plus line cards for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers are affected.
How can an attacker exploit this vulnerability?
An unauthenticated, remote attacker can cause the affected line card to reset using this vulnerability.
Is there a remedy available for this vulnerability?
At the time of this advisory, no remediation is available for the vulnerability.
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