External Control of File Name or Path in Cisco Unified Communications Products

1) External Control of File Name or Path

EUVDB-ID: #VU62477

Risk: Low

CVSSv4.0: [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-2022-20789

CWE-ID: CWE-73 - External Control of File Name or Path

Exploit availability: No

Description

The vulnerability allows a user attacker to write arbitrary files.

The vulnerability exists due to improper restrictions applied to a system script in the software upgrade process. A remote administrator can use specially crafted variables during the execution of a system upgrade and write arbitrary files on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Unified Communications Manager: 12.5(1) - 14.0

Cisco Unified Communications Manager Session Management Edition: 12.5.1 - 14.0

CPE2.3

• cpe:2.3:a:cisco_systems:Unified CM:12.5(1):*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:Unified CM:14.0:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_unified_communications_manager_session_management_edition:12.5.1:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_unified_communications_manager_session_management_edition:14.0:*:*:*:*:*:*:*

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-arb-write-74QzruUU

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.