#VU62477 External Control of File Name or Path in Cisco Unified Communications Manager and Cisco Unified Communications Manager Session Management Edition - CVE-2022-20789

Vulnerability identifier: #VU62477

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-2022-20789

CWE-ID: CWE-73

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Unified Communications Manager
Server applications / Other server solutions
Cisco Unified Communications Manager Session Management Edition
Server applications / Remote management servers, RDP, SSH

Vendor: Cisco Systems, Inc

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

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

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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.