CVE-2014-0743 in Unified Communications Manager
Summary
by MITRE
The Certificate Authority Proxy Function (CAPF) component in Cisco Unified Communications Manager (Unified CM) 10.0(1) and earlier allows remote attackers to bypass authentication and modify registered-device information via crafted data, aka Bug ID CSCum95468.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 04/12/2025
The vulnerability identified as CVE-2014-0743 resides within the Certificate Authority Proxy Function component of Cisco Unified Communications Manager version 10.0(1) and earlier releases. This critical security flaw affects organizations relying on Cisco's unified communications infrastructure for voice and video services. The CAPF component serves as an intermediary for certificate management operations within the unified communications framework, making it a crucial element for maintaining secure communication channels between devices and the central communication server. When exploited, this vulnerability creates a significant attack surface that could compromise the integrity of the entire unified communications ecosystem.
The technical implementation of this vulnerability stems from insufficient input validation and authentication mechanisms within the CAPF component. Attackers can craft specially formatted data packets that exploit weaknesses in the authentication flow, allowing them to bypass the normal security controls that should prevent unauthorized modifications to registered devices. This flaw specifically targets the validation processes that ensure only legitimate entities can update device registration information within the unified communications environment. The vulnerability demonstrates a classic authorization bypass issue where the system fails to properly verify the authenticity of requests before processing modifications to device configurations.
The operational impact of this vulnerability extends beyond simple unauthorized access to potentially catastrophic consequences for enterprise communication systems. An attacker who successfully exploits this vulnerability can modify registered device information, which may include device identifiers, registration parameters, and other critical configuration data. This capability enables attackers to potentially impersonate legitimate devices within the network, disrupt communication services, or create backdoor access points that could persist undetected for extended periods. The implications are particularly severe in enterprise environments where unified communications systems handle sensitive business communications and where device integrity is paramount for maintaining secure voice and video services.
Organizations affected by this vulnerability should implement immediate mitigations including applying the latest security patches provided by Cisco, which address the authentication bypass issue within the CAPF component. Network segmentation and monitoring of CAPF communications should be enhanced to detect anomalous device modification activities. The vulnerability aligns with CWE-287, which addresses improper authentication issues, and maps to ATT&CK technique T1556.001 for credential access through valid accounts, as attackers could potentially leverage this vulnerability to gain unauthorized access to device management functions. Additionally, implementing strict access controls and regular auditing of device registration changes can help detect and prevent exploitation attempts. Organizations should also consider deploying intrusion detection systems that can identify malformed data packets attempting to exploit this specific vulnerability pattern.
This vulnerability represents a significant risk to unified communications infrastructure security and highlights the importance of maintaining up-to-date security patches for enterprise communication systems. The potential for persistent unauthorized access and device manipulation makes this vulnerability particularly dangerous in environments where communication integrity and device authenticity are critical requirements. Security teams should prioritize assessment of their unified communications environments to identify systems running vulnerable versions of Cisco Unified Communications Manager and implement comprehensive monitoring solutions to detect exploitation attempts.