What is the severity of CVE-2021-34709?

The severity of CVE-2021-34709 is medium with a CVSS score of 6.4.

What is the vulnerability description of CVE-2021-34709?

CVE-2021-34709 is a vulnerability in the image verification checks of Cisco Network Convergence System (NCS) 540 Series Routers and Cisco 8000 Series Routers, which allows an authenticated, local attacker to execute arbitrary code.

How can an attacker exploit CVE-2021-34709?

An authenticated, local attacker can exploit CVE-2021-34709 to execute arbitrary code.

Is Cisco 8101-32fh vulnerable to CVE-2021-34709?

No, Cisco 8101-32fh is not vulnerable to CVE-2021-34709.

Vulnerability/
CVE-2021-34709

medium

6.9

CWE

347

9/9/2021

21/9/2021

CVE-2021-34709

Q: Which software versions are affected by CVE-2021-34709?

Cisco Network Convergence System (NCS) 540 Series Routers running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for Cisco 8000 Series Routers up to version 7.3.2 are affected by CVE-2021-34709.

First published: Thu Sep 09 2021(Updated: )

Multiple vulnerabilities in image verification checks of Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for Cisco 8000 Series Routers could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. For more information about these vulnerabilities, see the Details section of this advisory.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco IOS XR	<7.3.2
Cisco 8101-32fh
Cisco 8101-32h
Cisco 8102-64h
Cisco 8201
Cisco 8201-32fh
Cisco 8202
Cisco 8800 12-slot
Cisco 8800 18-slot
Cisco 8800 4-slot
Cisco 8800 8-slot
Cisco IOS XR	>=7.4.0<7.4.1
Cisco N540-12z20g-sys-a
Cisco N540-12z20g-sys-d
Cisco N540-24z8q2c-m
Cisco N540-24z8q2c-sys
Cisco N540-28z4c-sys-a
Cisco N540-28z4c-sys-d
Cisco N540-acc-sys
Cisco N540x-12z16g-sys-a
Cisco N540x-12z16g-sys-d
Cisco N540x-16z4g8q2c-a
Cisco N540x-16z4g8q2c-d
Cisco N540x-acc-sys

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Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lnt-QN9mCzwn

Frequently Asked Questions

What is the severity of CVE-2021-34709?
The severity of CVE-2021-34709 is medium with a CVSS score of 6.4.
Which software versions are affected by CVE-2021-34709?
Cisco Network Convergence System (NCS) 540 Series Routers running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for Cisco 8000 Series Routers up to version 7.3.2 are affected by CVE-2021-34709.
What is the vulnerability description of CVE-2021-34709?
CVE-2021-34709 is a vulnerability in the image verification checks of Cisco Network Convergence System (NCS) 540 Series Routers and Cisco 8000 Series Routers, which allows an authenticated, local attacker to execute arbitrary code.
How can an attacker exploit CVE-2021-34709?
An authenticated, local attacker can exploit CVE-2021-34709 to execute arbitrary code.
Is Cisco 8101-32fh vulnerable to CVE-2021-34709?
No, Cisco 8101-32fh is not vulnerable to CVE-2021-34709.

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