Privilege escalation in Cisco NX-OS Software

1) OS Command Injection

EUVDB-ID: #VU93546

Risk: High

CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2024-20399

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation. A local user can execute arbitrary commands as root on the underlying operating system of an affected device.

Note, the vulnerability is being actively exploited in the wild since of April 2024.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco NX-OS: All versions

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_nx-os:*:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cmd-injection-xD9OhyOP
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwj97007
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwj97009
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwj97011
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwj94682

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?

Yes. This vulnerability is being exploited in the wild.