#VU79939 Path traversal in Cisco Systems, Inc products - CVE-2023-20234

Vulnerability identifier: #VU79939

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-20234

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco FXOS
Operating systems & Components / Operating system
Firepower 1000 Series Appliances
Hardware solutions / Other hardware appliances
Firepower 2100 Series Security Appliances
Hardware solutions / Routers & switches, VoIP, GSM, etc
Firepower 4100 Series Security Appliances
Hardware solutions / Routers & switches, VoIP, GSM, etc
Firepower 9300 Series Security Appliances
Hardware solutions / Security hardware applicances
Secure Firewall 3100
Server applications / Server solutions for antivurus protection

Vendor: Cisco Systems, Inc

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

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

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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.