Resource management error in Cisco ASR 9001 Router and Cisco ASR 9000 Series Aggregation Services Routers - CVE-2021-34713

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Main Vulnerability Database Vulnerabilities #VU56421

Resource management error in Cisco ASR 9001 Router and Cisco ASR 9000 Series Aggregation Services Routers - CVE-2021-34713

Published: September 9, 2021


Vulnerability identifier: #VU56421
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-34713
CWE-ID: CWE-399
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources in the Layer 2 punt code of Cisco IOS XR Software running on Cisco ASR 9000 Series Aggregation Services Routers. A remote attacker on the local network can pass specially crafted data to the application and perform a denial of service (DoS) attack.


Affected software

Cisco ASR 9001 Router
Cisco ASR 9000 Series Aggregation Services Routers

How to mitigate CVE-2021-34713

Install updates from vendor's website.

Cisco ASR 9000 Series Aggregation Services Routers - addressed in versions 6.6.3, 6.7.1, 7.0.2, 7.1.1

External References

Related Security Bulletins