Vulnerability identifier: #VU80178

Vulnerability risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-20266

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Emergency Responder
Other software / Other software solutions
Cisco Unified Communications Manager
Server applications / Other server solutions
Cisco Unified Communications Manager Session Management Edition
Server applications / Remote management servers, RDP, SSH
Cisco Unity Connection
Client/Desktop applications / Messaging software

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to the affected application does not properly restrict the files that are being used for upgrades. A remote administrator can use a specially crafted upgrade file and elevate privileges to root.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Emergency Responder: 12.5.1SU4 - 14SU3

Cisco Unified Communications Manager: 12.5.1SU8

Cisco Unified Communications Manager Session Management Edition: 12.5.1SU8

Cisco Unity Connection: 12.5.1SU6 - 14SU3

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External links
http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-priv-esc-D8Bky5eg

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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.