CVE-2006-2476 in Bitrix Site Manager
Summary
by MITRE
Bitrix Site Manager 4.1.x stores updater.log under the web document root with insufficient access control, which allows remote attackers to obtain sensitive information.
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Analysis
by VulDB Data Team • 09/10/2017
The vulnerability identified as CVE-2006-2476 affects Bitrix Site Manager version 4.1.x and represents a critical information disclosure flaw stemming from improper access control mechanisms. This vulnerability manifests when the system creates an updater.log file within the web document root directory, creating a scenario where unauthorized remote attackers can access sensitive system information through simple web requests. The flaw directly violates fundamental security principles by exposing log files containing potentially sensitive operational data to any user with network access to the affected web server.
The technical implementation of this vulnerability exploits the web server's directory structure and file access permissions. When Bitrix Site Manager performs updates, it generates an updater.log file that gets stored in the web-accessible document root directory. This placement inherently exposes the log file to HTTP requests without proper authentication or authorization checks. The log file typically contains detailed information about the update process including system paths, database connection details, user credentials, and other operational artifacts that could be leveraged by attackers for further exploitation. This represents a classic case of insecure direct object reference vulnerability where the system fails to properly validate access permissions for files within the web root.
The operational impact of this vulnerability extends beyond simple information disclosure, as the sensitive data contained within the updater.log file could enable attackers to craft more sophisticated attacks against the target system. The log file may contain database connection strings, file paths, user account information, or other system configuration details that significantly reduce the attack surface for subsequent exploitation attempts. According to CWE classification, this vulnerability maps to CWE-22 which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal attacks. The exposure of such information creates opportunities for attackers to perform reconnaissance and potentially escalate privileges within the affected environment.
From an ATT&CK framework perspective, this vulnerability aligns with techniques categorized under initial access and reconnaissance phases, specifically T1083 (File and Directory Discovery) and T1566 (Phishing for Information). Attackers could leverage this information to identify system components, validate their access, and plan more targeted attacks against the affected Bitrix installation. The vulnerability also demonstrates poor principle of least privilege implementation, where files containing sensitive operational data are placed in directories accessible without proper authentication mechanisms. This flaw essentially provides attackers with a low-effort method to gather intelligence about the system's internal structure and operational details.
The recommended mitigation strategies for this vulnerability involve immediate implementation of proper access controls and file placement policies. System administrators should ensure that log files containing sensitive information are stored outside the web document root directory or are protected by appropriate access controls. The Bitrix Site Manager should be updated to a version that properly secures log file access or configured to store updater.log files in restricted directories accessible only through appropriate authentication mechanisms. Additionally, implementing web server configuration rules to prevent direct access to log files and establishing regular monitoring for unauthorized file access attempts can significantly reduce the risk exposure. Organizations should also conduct comprehensive security audits to identify other files potentially exposed in similar ways within their web application environments, as this type of vulnerability often indicates broader security misconfigurations that require systematic remediation approaches.