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

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-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

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.