CVE-2007-3691 in AV Tutorial Script
Summary
by MITRE
Multiple SQL injection vulnerabilities in changePW.php in AV Tutorial Script (avtutorial) 1.0, when magic_quotes_gpc is disabled, allow remote attackers to execute arbitrary SQL commands via the (1) id and (2) userid parameters, a different issue than CVE-2007-3630.
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Analysis
by VulDB Data Team • 09/02/2017
The vulnerability identified as CVE-2007-3691 represents a critical SQL injection flaw within the AV Tutorial Script version 1.0, specifically affecting the changePW.php component. This vulnerability manifests when the PHP configuration setting magic_quotes_gpc is disabled, creating a dangerous condition where user input is not properly sanitized before being incorporated into database queries. The flaw impacts two distinct parameters within the script: id and userid, both of which can be manipulated by remote attackers to inject malicious SQL commands. This vulnerability falls under the CWE-89 category of SQL Injection, which is classified as a high-risk vulnerability in the CWE top 25 most dangerous software weaknesses list. The attack vector is particularly concerning as it allows for remote code execution and unauthorized database access without requiring authentication.
The technical exploitation of this vulnerability occurs through direct manipulation of the id and userid parameters in the changePW.php script. When magic_quotes_gpc is disabled, PHP does not automatically escape special characters in GET, POST, and COOKIE data, leaving the application susceptible to malicious input. Attackers can craft SQL payloads that bypass normal input validation and execute arbitrary database commands, potentially leading to data theft, data modification, or complete database compromise. The vulnerability is distinct from CVE-2007-3630, indicating a separate code path or implementation issue within the same application framework. This type of injection vulnerability demonstrates poor input validation practices and highlights the critical importance of proper data sanitization in web applications. The flaw operates at the application layer and can be exploited through standard web browser interactions, making it particularly dangerous for publicly accessible web services.
The operational impact of this vulnerability extends beyond simple data compromise to encompass potential system-wide damage and unauthorized access to sensitive user information. Remote attackers could leverage this vulnerability to escalate privileges, access user accounts, modify or delete database records, and potentially gain deeper system access through database-level attacks. The vulnerability's persistence in the AV Tutorial Script 1.0 indicates a fundamental flaw in the application's security architecture and input handling mechanisms. Organizations using this script would face significant risk of data breaches, compliance violations, and potential legal consequences if such vulnerabilities remain unpatched. The attack surface is particularly wide since the vulnerability affects a password change function, which is frequently accessed and typically requires minimal authentication. This makes the exploitation more likely and increases the potential for widespread impact.
Mitigation strategies for CVE-2007-3691 must address both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities. The most direct solution involves implementing proper input validation and parameterized queries to prevent SQL injection attacks, ensuring that magic_quotes_gpc is either enabled or that application-level sanitization is implemented. Organizations should also consider implementing web application firewalls and input filtering mechanisms to detect and prevent malicious SQL injection attempts. The remediation process should include updating to patched versions of the AV Tutorial Script, as well as conducting comprehensive security audits of all application components to identify similar vulnerabilities. From an ATT&CK framework perspective, this vulnerability maps to techniques involving SQL injection and command execution, with potential lateral movement opportunities once initial access is gained. Regular security testing, including automated scanning and manual penetration testing, should be implemented to identify and remediate similar weaknesses in the application's codebase and overall security posture.