Cisco Unified Communications Manager Information Disclosure Scanner

The Cisco Unified Communications Manager (UCM) is a call-processing component of the Cisco Unified Communications solution, used by various organizations for IP telephony and communication management. UCM is typically deployed in enterprise environments to manage voice, video, messaging, mobility, and conferencing services. It helps reduce operational costs and simplifies the administration of voice, messaging, and video communications. Cisco UCM is widely utilized in settings that require robust and scalable communications solutions. It integrates with other Cisco UC applications and endpoints as a centralized platform for cohesive communication management.

The Information Disclosure vulnerability in the Cisco Unified Communications Manager arises from improper access control in its UDS API. This vulnerability allows unauthenticated attackers to access sensitive information about the cluster nodes. The primary concern here is the exposure of server details which could be exploited by attackers for further reconnaissance or malicious planning. The flaw lies in the failure to secure API endpoints that handle sensitive data requests. Consequently, unauthorized access to backend server information is possible without providing credentials.

The technical details of the vulnerability involve the UDS API endpoint, which can be accessed without authentication. The endpoint '/cucm-uds/servers' returns cluster node information in XML format when queried. A GET request to this endpoint with an 'Accept: application/xml' header yields a list of server nodes, compromising the confidentiality of server information. The status code of 200 and the presence of XML content in the response body confirms the vulnerability. Effective exploitation provides attackers with a blueprint of the server infrastructure, which can be detrimental to the organization's security posture.

When exploited, this vulnerability can lead to potential security risks such as targeted attacks on exposed servers. Attackers could craft attacks specific to identified servers, potentially leading to further exploitation of known vulnerabilities or unauthorized access. Such information disclosure can also aid in social engineering attacks by providing attackers with detailed insights into the organization's communications setup. In environments relying heavily on Cisco UCM for critical communications, this represents a significant risk.

REFERENCES

• https://developer.cisco.com/site/user-data-services/develop-and-test/api-reference/#servers