Privilege escalation in Cisco Unified Communications Products



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-20266
CWE-ID CWE-264
Exploitation vector Network
Public exploit N/A
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

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU80178

Risk: Low

CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-20266

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

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

CPE2.3 External links

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


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.



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