CVE-2022-20789 : A vulnerability in the software upgrade process of Cisco Unified Communications

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.

Published 2022-04-21 19:15:09

Updated 2022-05-03 16:56:44

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: File inclusion

Products affected by CVE-2022-20789

Cisco » Unified Communications Manager » Version: 12.5(1)
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:-:*:*:*
Matching versions
Cisco » Unified Communications Manager » Version: 12.5(1) Session Management Edition
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:session_management:*:*:*
Matching versions
Cisco » Unified Communications Manager » Version: 14.0
cpe:2.3:a:cisco:unified_communications_manager:14.0:*:*:*:-:*:*:*
Matching versions
Cisco » Unified Communications Manager » Version: 14.0 Session Management Edition
cpe:2.3:a:cisco:unified_communications_manager:14.0:*:*:*:session_management:*:*:*
Matching versions

Threat overview for CVE-2022-20789

Top countries where our scanners detected CVE-2022-20789

Top open port discovered on systems with this issue 5061

IPs affected by CVE-2022-20789 453

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2022-20789!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2022-20789

EPSS FAQ

0.40%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 58 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2022-20789

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
8.5	HIGH	AV:N/AC:L/Au:S/C:N/I:C/A:C	8.0	9.2	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: None Integrity Impact: Complete Availability Impact: Complete
4.9	MEDIUM	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N	1.2	3.6	Cisco Systems, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None
6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H	1.2	5.2	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: High

CWE ids for CVE-2022-20789

CWE-73 External Control of File Name or Path

The product allows user input to control or influence paths or file names that are used in filesystem operations.

Assigned by: ykramarz@cisco.com (Secondary)
CWE-610 Externally Controlled Reference to a Resource in Another Sphere

The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2022-20789

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

Cisco Unified Communications Products Arbitrary File Write Vulnerability
Vendor Advisory