CVE-2005-2956 in ATutor
Summary
by MITRE
ATutor 1.5.1, and possibly earlier versions, stores temporary chat logs under the web document root with insufficient access control and predictable filenames, which allows remote attackers to obtain user chat conversations via direct requests to those files.
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Analysis
by VulDB Data Team • 03/23/2025
The vulnerability described in CVE-2005-2956 affects ATutor version 1.5.1 and potentially earlier releases, representing a critical security flaw in the web application's handling of temporary chat log storage. This issue stems from improper access control mechanisms and predictable file naming conventions that expose sensitive user communications to unauthorized access. The vulnerability specifically targets the temporary chat logging functionality within the ATutor learning management system, which is commonly used for online course discussions and real-time communication between students and instructors.
The technical implementation of this flaw involves the application storing temporary chat log files directly within the web document root directory structure, making them accessible through standard web requests. The combination of insufficient access control measures and predictable filename patterns creates a scenario where remote attackers can directly request these files by knowing their location and naming convention. This represents a classic case of insecure direct object reference vulnerability, where the application fails to properly validate or authenticate access attempts to sensitive resources. The predictable filenames allow attackers to enumerate and access chat logs without requiring valid session credentials or authentication tokens, effectively bypassing the application's intended access controls.
The operational impact of this vulnerability is significant as it exposes private user conversations and potentially sensitive educational content to unauthorized parties. Chat logs may contain personal information, academic discussions, course-related communications, and other confidential data that could be exploited for identity theft, social engineering attacks, or academic misconduct. The vulnerability affects the confidentiality aspect of the CIA triad, as it allows unauthorized disclosure of information that should remain private between users and instructors. This exposure could lead to privacy violations, academic integrity issues, and potential legal consequences for educational institutions using vulnerable versions of ATutor.
Mitigation strategies for this vulnerability should focus on implementing proper access controls and secure file storage practices. Organizations should immediately upgrade to patched versions of ATutor that address this specific flaw, as the vulnerability is well-documented and remediation is straightforward. The recommended approach involves moving temporary chat log files outside the web document root and implementing proper access control mechanisms that validate user permissions before allowing file access. This aligns with security best practices outlined in the OWASP Top Ten and follows the principle of least privilege. Additionally, implementing random or non-predictable filenames for temporary files would prevent enumeration attacks, while proper authentication checks would ensure that only authorized users can access their respective chat logs.
This vulnerability relates to multiple security frameworks and standards, including CWE-22 which addresses improper limitation of a pathname to a restricted directory, and CWE-284 which covers improper access control. The issue also maps to ATT&CK technique T1078 for valid accounts and T1566 for phishing, as attackers could potentially use the exposed chat logs for social engineering or credential harvesting. The vulnerability demonstrates the importance of proper input validation and access control implementation, particularly for applications handling user communications and sensitive educational data. Organizations should conduct regular security assessments to identify similar insecure file handling patterns and implement comprehensive security controls to prevent unauthorized access to sensitive information within web applications.