Denial of service in Cisco Unified Communications Products

1) Input validation error

EUVDB-ID: #VU81671

Risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-20259

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper API authentication and incomplete validation of the API request. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Emergency Responder: 14.0(1.14900.8) - 14SU3

Cisco Prime Collaboration Deployment: 14.0(1.13900.96) - 14SU3

Cisco Unified Communications Manager: 12.5(1)SU7 - 14SU3

Cisco Unified Communications Manager IM & Presence Service: 12.5(1)SU7 - 14SU3

Cisco Unified Communications Manager Session Management Edition: 12.5(1)SU7 - 14SU3

Cisco Unity Connection: 12.5 - 14SU3

External links

http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-apidos-PGsDcdNF

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.