CVE-2005-1376 in Claroline
Summary
by MITRE
Multiple directory traversal vulnerabilities in (1) document.php or (2) insertMyDoc.php in Claroline 1.5.3 through 1.6 Release Candidate 1, and possibly Dokeos, allow remote project administrators to upload arbitrary files.
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Analysis
by VulDB Data Team • 06/01/2019
The vulnerability described in CVE-2005-1376 represents a critical directory traversal flaw affecting Claroline learning management systems version 1.5.3 through 1.6 Release Candidate 1, with potential impact on Dokeos platforms. This vulnerability specifically targets two key files within the Claroline ecosystem: document.php and insertMyDoc.php, which are responsible for handling document uploads and management operations. The flaw enables remote project administrators to bypass normal file upload restrictions and execute arbitrary file uploads, creating a significant security risk for educational institutions relying on these platforms.
The technical implementation of this directory traversal vulnerability stems from inadequate input validation and improper path handling within the document management functions. When project administrators attempt to upload files through the affected php scripts, the system fails to properly sanitize or validate the file paths provided in the upload requests. This weakness allows attackers to manipulate the upload process by crafting malicious file paths that traverse the directory structure beyond intended boundaries. The vulnerability operates at the file system level, where the application does not properly restrict the destination directories for uploaded files, enabling attackers to place malicious files in sensitive locations within the web root or application directories.
The operational impact of this vulnerability extends beyond simple unauthorized file uploads, creating a potential pathway for remote code execution and complete system compromise. Remote project administrators with legitimate access privileges can exploit this flaw to upload malicious files such as web shells, backdoors, or other malicious executables that can be executed within the web server context. This scenario represents a privilege escalation vulnerability where legitimate users can leverage their administrative capabilities to gain unauthorized access to system resources. The attack vector operates entirely through the web interface, requiring no direct system access or physical presence, making it particularly dangerous for online educational platforms hosting sensitive student and institutional data.
Security professionals should note that this vulnerability aligns with CWE-22 Directory Traversal and CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component, which are fundamental weaknesses in input validation and output sanitization. The ATT&CK framework categorizes this as a privilege escalation technique under T1078 Valid Accounts, where attackers leverage legitimate administrative privileges to perform unauthorized actions. Organizations should implement immediate mitigations including input validation for all file upload operations, proper path normalization, and strict restrictions on upload destinations. The vulnerability also highlights the importance of secure coding practices around file handling and the need for comprehensive security testing of web applications, particularly those handling user uploads. Additionally, network segmentation and monitoring of upload activities should be implemented to detect and prevent exploitation attempts.
The broader implications of this vulnerability extend to educational institutions that rely on open source learning management systems, demonstrating how seemingly minor input validation flaws can create significant security risks. This issue underscores the critical importance of maintaining up-to-date software versions and implementing robust security controls around file upload functionality. Organizations should conduct thorough security assessments of their LMS platforms and ensure proper access controls are in place to prevent unauthorized privilege escalation. The vulnerability also emphasizes the need for regular security audits and penetration testing of educational technology platforms that handle sensitive user data and content management operations.