QID 317032

Date Published: 2021-09-09

QID 317032: Cisco Internetwork Operating System (IOS) XR Software for ASR 9000 Series Routers Denial of Service (DoS) Vulnerability (cisco-sa-npspin-QYpwdhFD)

A vulnerability in the Layer 2 punt code of Cisco IOS XR Software running on Cisco ASR 9000 Series Aggregation Services Routers
could allow an unauthenticated, adjacent attacker to cause the affected line card to reboot.

Affected Products
Cisco IOS XR Software when all the following conditions apply:
i. The Cisco IOS XR Software release is Release 6.4.0 or later but earlier than a first fixed release.
ii. The software is running on Cisco ASR 9000 Series Aggregation Services Routers.
iii. These routers have either a Typhoon or Tomahawk Ethernet line card installed.

Vulnerable releases:
From 6.4.0 Prior to 6.6.3
From 6.7 Prior to 6.7.1
From 7.0 Prior to 7.0.2
From 7.1 Prior to 7.1.1

QID Detection Logic (Authenticated):
The check matches Cisco IOS XR version retrieved via Unix Auth using "show version" command.

A successful exploit could allow the attacker to cause the affected line card to reboot.

  • CVSS V2 rated as High - 7.5 severity.
    • Solution

    Customers are advised to refer to cisco-sa-npspin-QYpwdhFD for more information.

    Vendor References

    CVEs related to QID 317032

    CVE-2021-34713 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-npspin-QYpwdhFD URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-npspin-QYpwdhFD
    By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].