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TI-2023-06815 Aliases CVE-2023-20108GHSA-8937-gcf5-34xq

Resource allocation without limits in Cisco Unified Communications Manager IM and…

Priority LOW 35CWE-789Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-789.

Summary

A vulnerability in the XCP Authentication Service of the Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) could allow an unauthenticated, remote attacker to cause a temporary service outage for all Cisco Unified CM IM&P users who are attempting to authenticate to the service, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted login message to the affected device. A successful exploit could allow the attacker to cause an unexpected restart of the authentication service, preventing new users from successfully authenticating. Exploitation of this vulnerability does not impact Cisco Unified CM IM&P users who were authenticated prior to an attack.

Why it matters now

EPSS 0.00933 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Unified Communications Manager IM and Presence Service10.5(1); 10.5(2); 10.5(2a); 10.5(2b); 10.5(2)SU3; 10.5(2)SU2a; 10.5(2)SU4a; 10.5(2)SU4; 10.5(1)SU3; 10.5(1)SU1; 10.5(2)SU1; 10.5(2)SU2; 10.5(1)SU2; 11.5(1); 11.5(1)SU1; 11.5(1)SU2; 11.5(1)SU3; 11.5(1)SU3a; 11.5(1)SU4; 11.5(1)SU5; 11.5(1)SU5a; 11.5(1)SU6; 11.5(1)SU7; 11.5(1)SU8; 11.5(1)SU9; 11.5(1)SU10; 11.5(1)SU11; 11.0(1); 11.0(1)SU1; 12.5(1); 12.5(1)SU1; 12.5(1)SU2; 12.5(1)SU3; 12.5(1)SU4; 12.5(1)SU5; 12.5(1)SU6; 14; 14SU1; 14SU2; 14SU2a; 10.0(1); 10.0(1)SU1; 10.0(1)SU2—No fix listedCNA
  • Cisco Unified Communications Manager IM and Presence Service VendorCisco Affected 10.5(1); 10.5(2); 10.5(2a); 10.5(2b); 10.5(2)SU3; 10.5(2)SU2a; 10.5(2)SU4a; 10.5(2)SU4; 10.5(1)SU3; 10.5(1)SU1; 10.5(2)SU1; 10.5(2)SU2; 10.5(1)SU2; 11.5(1); 11.5(1)SU1; 11.5(1)SU2; 11.5(1)SU3; 11.5(1)SU3a; 11.5(1)SU4; 11.5(1)SU5; 11.5(1)SU5a; 11.5(1)SU6; 11.5(1)SU7; 11.5(1)SU8; 11.5(1)SU9; 11.5(1)SU10; 11.5(1)SU11; 11.0(1); 11.0(1)SU1; 12.5(1); 12.5(1)SU1; 12.5(1)SU2; 12.5(1)SU3; 12.5(1)SU4; 12.5(1)SU5; 12.5(1)SU6; 14; 14SU1; 14SU2; 14SU2a; 10.0(1); 10.0(1)SU1; 10.0(1)SU2 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:12.5\(1\):*:*:*:*:*:*:*12.5(1)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:14su:*:*:*:*:*:*:*14suVulnerableCisco
  • cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:12.5\(1\):*:*:*:*:*:*:* Versions 12.5(1) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:14su:*:*:*:*:*:*:* Versions 14su Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-20108
  2. 2026-10-03 Alias added: GHSA-8937-gcf5-34xq

References

Advisory 1

  • TI-2026-16259 Cisco Unified Communications Products Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-13188 Deserialization of untrusted data in Cisco Unified Contact Center Enterprise CVSS 3.1CRITICAL 10.0
  • TI-2019-01468 Improper input validation in Cisco TelePresence Video Communication Server CVSS 3.0HIGH 8.6
  • TI-2017-09109 Improper authentication in Cisco Voice Operating System CVSS 3.0CRITICAL 9.8
  • TI-2018-00368 Improper input validation in Cisco Unified Communications Manager IM & Presence Service CVSS 3.1HIGH 7.5
See all 38 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences