Path traversal in Cisco FXOS Software

1) Path traversal

EUVDB-ID: #VU79939

Risk: Low

CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-20234

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the CLI. A remote administrator can send a specially crafted HTTP request and overwrite arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco FXOS: All versions

Firepower 1000 Series Appliances: 6.2.3 - 9.19.1

Firepower 2100 Series Security Appliances: 6.2.3 - 9.19.1

Firepower 4100 Series Security Appliances: 2.0.1.37 - 2.13.0.198

Firepower 9300 Series Security Appliances: 2.0.1.37 - 2.13.0.198

Secure Firewall 3100: 6.2.3 - 9.19.1

External links

http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fxos-arbitrary-file-BLk6YupL

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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