CVE-2008-4545 in Unity
Summary
by MITRE
Cisco Unity 4.x before 4.2(1)ES161, 5.x before 5.0(1)ES53, and 7.x before 7.0(2)ES8 uses weak permissions for the D:\CommServer\Reports directory, which allows remote authenticated users to obtain sensitive information by reading files in this directory.
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Analysis
by VulDB Data Team • 08/19/2019
Cisco Unity communication platforms running versions 4.x before 4.2(1)ES161, 5.x before 5.0(1)ES53, and 7.x before 7.0(2)ES8 contain a critical information disclosure vulnerability stemming from inadequate file system permissions within the D:\CommServer\Reports directory. This weakness allows authenticated remote attackers to access sensitive data by simply reading files in this specific directory structure, representing a fundamental failure in access control implementation.
The vulnerability manifests through improper discretionary access control mechanisms that fail to enforce appropriate security boundaries around the reports directory. This directory contains sensitive operational data including call logs, user activity records, system metrics, and potentially confidential business information generated by the communication platform. The weak permissions configuration essentially creates an unauthorized information disclosure channel that bypasses normal authentication and authorization protocols. According to CWE-276, this represents a classic case of incorrect permissions, where the system fails to properly restrict access to sensitive resources through inadequate access control enforcement.
The operational impact of this vulnerability extends beyond simple data exposure, as the compromised information could be leveraged for further attacks within the network infrastructure. Attackers could potentially extract user credentials, system configurations, or business intelligence that would facilitate more sophisticated exploitation techniques. This vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1567 (Exfiltration Over Web Service), as it enables unauthorized data collection and potential information theft. The remote nature of the attack means that an authenticated user could exploit this weakness from any location, making it particularly dangerous for enterprise environments where the platform manages sensitive communication data.
Organizations affected by this vulnerability should immediately implement mandatory software updates to the patched versions mentioned in the advisory. The remediation process should include comprehensive permission reviews of all system directories, particularly those containing operational data or user information. Security teams should conduct thorough audits of file system access controls and implement principle of least privilege configurations for all system directories. Additionally, network segmentation strategies should be reviewed to limit the potential impact of such vulnerabilities, and continuous monitoring should be implemented to detect unauthorized access attempts to sensitive directories. The vulnerability demonstrates the critical importance of proper access control implementation and the potential consequences of inadequate file system permissions in enterprise communication platforms.