CVE-2022-20789

Cisco Unified Communications Products Arbitrary File Write Vulnerability

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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.

Una vulnerabilidad en el proceso de actualización de software de Cisco Unified Communications Manager (Unified CM) y Cisco Unified Communications Manager Session Management Edition (Unified CM SME) podría permitir a un atacante remoto autenticado escribir archivos arbitrarios en el sistema afectado. Esta vulnerabilidad es debido a restricciones inapropiadas aplicadas a un script del sistema. Un atacante podría explotar esta vulnerabilidad al usar variables diseñadas durante la ejecución de una actualización del sistema. Una explotación con éxito podría permitir al atacante sobrescribir o añadir datos arbitrarios a los archivos del sistema usando privilegios de nivel root

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2021-11-02 CVE Reserved
2022-04-21 CVE Published
2023-11-12 EPSS Updated
2024-11-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-73: External Control of File Name or Path
CWE-610: Externally Controlled Reference to a Resource in Another Sphere

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-arb-write-74QzruUU	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Unified Communications Manager Search vendor "Cisco" for product "Unified Communications Manager"				12.5\(1\) Search vendor "Cisco" for product "Unified Communications Manager" and version "12.5\(1\)"		-		Affected
Cisco Search vendor "Cisco"		Unified Communications Manager Search vendor "Cisco" for product "Unified Communications Manager"				12.5\(1\) Search vendor "Cisco" for product "Unified Communications Manager" and version "12.5\(1\)"		session_management		Affected
Cisco Search vendor "Cisco"		Unified Communications Manager Search vendor "Cisco" for product "Unified Communications Manager"				14.0 Search vendor "Cisco" for product "Unified Communications Manager" and version "14.0"		-		Affected
Cisco Search vendor "Cisco"		Unified Communications Manager Search vendor "Cisco" for product "Unified Communications Manager"				14.0 Search vendor "Cisco" for product "Unified Communications Manager" and version "14.0"		session_management		Affected