CVE-2014-3318 in Unified Communications Manager
Summary
by MITRE
Directory traversal vulnerability in dna/viewfilecontents.do in the Dialed Number Analyzer (DNA) component in Cisco Unified Communications Manager allows remote authenticated users to read arbitrary files via a crafted URL, aka Bug ID CSCup76318.
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Analysis
by VulDB Data Team • 03/24/2022
The vulnerability identified as CVE-2014-3318 represents a critical directory traversal flaw within the Dialed Number Analyzer component of Cisco Unified Communications Manager. This security weakness exists in the dna/viewfilecontents.do web endpoint, which processes file access requests within the communication system's infrastructure. The vulnerability specifically affects Cisco Unified Communications Manager versions prior to 9.1(2) and 8.6(5) releases, creating a significant risk for organizations relying on these telephony systems for their business operations.
The technical implementation of this directory traversal vulnerability stems from inadequate input validation within the DNA component's file viewing functionality. When authenticated users submit crafted URLs containing directory traversal sequences such as ../ or ..\, the system fails to properly sanitize these inputs before processing file requests. This allows attackers to navigate beyond the intended file access boundaries and retrieve arbitrary files from the underlying operating system. The vulnerability specifically targets the viewfilecontents.do endpoint which serves as an interface for accessing diagnostic and operational files within the DNA module.
From an operational impact perspective, this vulnerability exposes organizations to severe data compromise risks including unauthorized access to sensitive system files, configuration data, and potentially confidential communication records. Attackers can leverage this weakness to extract system logs, user credentials stored in configuration files, network settings, and other privileged information that could facilitate further attacks within the network infrastructure. The authenticated nature of the vulnerability means that attackers must first obtain valid credentials, but once achieved, they can access the entire file system of the affected system without proper authorization boundaries.
Organizations should implement immediate mitigations including applying the relevant Cisco security patches and updates, which address the input validation shortcomings in the DNA component. Network segmentation and access controls should be enhanced to limit access to the affected system to only authorized personnel. Additionally, implementing web application firewalls and monitoring for suspicious URL patterns containing directory traversal sequences can help detect and prevent exploitation attempts. The vulnerability aligns with CWE-22 Directory Traversal and maps to ATT&CK technique T1078 Valid Accounts for initial access and T1566 Phishing for credential acquisition, highlighting the multi-stage attack approach often employed against such systems. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other components of the unified communications infrastructure.