#VU56423 OS Command Injection in Cisco IOS XR and Cisco ASR 9000 Series Aggregation Services Routers - CVE-2021-34721 

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Main Vulnerability Database Vulnerabilities #VU56423

#VU56423 OS Command Injection in Cisco IOS XR and Cisco ASR 9000 Series Aggregation Services Routers - CVE-2021-34721

Published: September 9, 2021


Vulnerability identifier: #VU56423
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-2021-34721
CWE-ID: CWE-78
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Cisco IOS XR
Cisco ASR 9000 Series Aggregation Services Routers
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper input validation in the XML configuration manager of Cisco IOS XR Software. A local user can pass specially crafted data to the application and execute arbitrary OS commands on the target system.


Remediation

Install updates from vendor's website.

External links