#VU56863 Command Injection in Cisco IOS XE SD-WAN and Cisco IOS XE - CVE-2021-34729

Vulnerability identifier: #VU56863

Vulnerability risk: Low

CVSSv4.0: 5.7 [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-2021-34729

CWE-ID: CWE-77

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Cisco IOS XE SD-WAN
Other software / Other software solutions
Cisco IOS XE
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a local user to execute arbitrary commands on the target system.

The vulnerability exists due to insufficient validation of arguments passed to certain CLI commands. A local administrator can pass specially crafted data to the application and execute arbitrary commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XE SD-WAN: before 16.12.5

Cisco IOS XE: before 16.12.5, 17.2.3, 17.3.1a, 17.3.2, 17.3.3, 17.3.4a, 17.4.1a, 17.4.1b, 17.4.2, 17.5.1a, 17.6.1a, 16.12.5, 16.12.5, 16.12.5, 16.12.5, 16.12.5, 16.12.5

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxesdwan-clicmdinj-7bYX5k3

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.