Exposure of Resource to Wrong Sphere in Cisco Systems, Inc products - CVE-2021-34723

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Main Vulnerability Database Vulnerabilities #VU56861

Exposure of Resource to Wrong Sphere in Cisco Systems, Inc products - CVE-2021-34723

Published: September 24, 2021


Vulnerability identifier: #VU56861
CSH Severity: Low
CVSS v4: 8.4 [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]
CVE-ID: CVE-2021-34723
CWE-ID:
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to overwrite arbitrary files on the system. 

The vulnerability exists due to insufficient validation of specific CLI command parameters. A local administrator can overwrite the content of the configuration database and gain root-level access to an affected device. 


Affected software

Cisco 1000 Series Integrated Services Routers
Cisco 4000 Series Integrated Services Routers
Cisco ASR 1000 Series Aggregation Services Routers
Cisco Cloud Services Router 1000V Series
Cisco IOS XE SD-WAN

How to mitigate CVE-2021-34723

Install updates from vendor's website.

Cisco IOS XE SD-WAN - addressed in versions 17.3.3, 17.3.4a, 17.4.2, 17.5.1a, 17.6.1a

External References

Related Security Bulletins