Privilege escalation in Cisco FXOS CLI

1) OS Command Injection

EUVDB-ID: #VU66752

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20865

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 in the CLI. A local user can pass specially crafted arguments to a CLI command and execute arbitrary OS commands with root privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Firepower 4100 Series Security Appliances: All versions

Cisco Firepower 9300 Security Appliance: All versions

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fxos-cmdinj-TxcLNZNH
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCwc38361

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.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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