CVE-2022-20789: cisco cisco unified communications manager External Control of File Name or Path

Vulnerability summary

CVE-2022-20789 is a high (CVSS 8.5) External Control of File Name or Path vulnerability in cisco cisco unified communications manager. EPSS estimates a 1.43% chance of exploitation in the next 30 days, higher than 72.5% of scored vulnerabilities.

Timeline

1. 21-04-2022
   PublishedVulnerability first disclosed.
2. 06-11-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability in the software upgrade process of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an authenticated, remote attacker to write arbitrary files on the affected system. This vulnerability is due to improper restrictions applied to a system script. An attacker could exploit this vulnerability by using crafted variables during the execution of a system upgrade. A successful exploit could allow the attacker to overwrite or append arbitrary data to system files using root-level privileges.

• CWE-73External Control of File Name or PathThe product allows user input to control or influence paths or file names that are used in filesystem operations.
• CWE-610Externally Controlled Reference to a Resource in Another SphereThe product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.