CVE-2014-7988 in Unity Connection
Summary
by MITRE
The Unified Messaging Service (UMS) in Cisco Unity Connection 10.5 and earlier allows remote authenticated users to obtain sensitive information by reading log files, aka Bug ID CSCur06493.
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Analysis
by VulDB Data Team • 04/03/2022
The vulnerability identified as CVE-2014-7988 resides within Cisco Unity Connection's Unified Messaging Service component, specifically affecting versions 10.5 and earlier. This issue represents a critical information disclosure flaw that undermines the security posture of organizations relying on Cisco's unified communications platform. The vulnerability stems from inadequate access controls and improper file handling mechanisms within the UMS service, creating an avenue for authenticated attackers to gain unauthorized access to sensitive system information through log file enumeration.
The technical flaw manifests when authenticated users leverage their existing credentials to access log files that contain sensitive operational data, configuration details, and potentially system credentials. This represents a classic privilege escalation scenario where legitimate authenticated users can exploit the system's logging mechanisms to extract information that should remain confidential. The vulnerability operates through the service's insufficient input validation and access control enforcement, allowing users to traverse file system paths and retrieve log content containing sensitive data elements such as user credentials, system configurations, and operational details that could be leveraged for further attacks.
The operational impact of this vulnerability extends beyond simple information disclosure, as the extracted log data can provide attackers with valuable intelligence for subsequent exploitation phases. Attackers can use the acquired information to understand system architecture, identify potential attack vectors, and develop more sophisticated attack strategies. The vulnerability particularly affects organizations using Cisco Unity Connection for voice messaging and unified communications, where the exposed information could include user account details, system configurations, and potentially authentication tokens that could be used to compromise additional system components. This vulnerability aligns with CWE-200, which addresses improper information disclosure, and represents a significant deviation from the principle of least privilege in system design.
Organizations should implement immediate mitigations including updating to Cisco Unity Connection versions that address this vulnerability, implementing strict access controls for log file access, and conducting comprehensive security audits of their unified communications infrastructure. The remediation process should involve disabling unnecessary log file access permissions for authenticated users, implementing proper file system permissions, and establishing monitoring protocols to detect unauthorized access attempts to sensitive system files. Additionally, organizations should consider implementing network segmentation and access control policies that limit the scope of authenticated user access to only necessary system components. This vulnerability demonstrates the importance of proper information classification and access control implementation within unified communications platforms, aligning with ATT&CK technique T1083 for discovery of file and directory permissions and T1005 for data from local system. The incident underscores the necessity for comprehensive security testing of communication platforms and the critical need for proper log management practices that prevent unauthorized access to sensitive operational data through default system configurations.