#VU56425 Improper Verification of Cryptographic Signature in Cisco 8000 Series Routers and Cisco Network Convergence System 540 Series Routers - CVE-2021-34709

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Main Vulnerability Database Vulnerabilities #VU56425

#VU56425 Improper Verification of Cryptographic Signature in Cisco 8000 Series Routers and Cisco Network Convergence System 540 Series Routers - CVE-2021-34709

Published: September 9, 2021


Vulnerability identifier: #VU56425
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-34709
CWE-ID: CWE-347
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Cisco 8000 Series Routers
Cisco Network Convergence System 540 Series Routers
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a local administrator to execute arbitrary code on the system. 

The vulnerability exists in the Cisco IOS XR due to a race condition that occurs when the install request is being processed. A local administrator can modify an ISO image and execute arbitrary code on the affected device. 


Remediation

Install updates from vendor's website.

External links