CVE-2008-1554 in TopperMod
Summary
by MITRE
SQL injection vulnerability in account/index.php in TopperMod 2.0, when magic_quotes_gpc is disabled, allows remote attackers to execute arbitrary SQL commands via a non-alphanumeric first character the localita parameter, which bypasses a protection mechanism.
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Analysis
by VulDB Data Team • 10/20/2024
The vulnerability described in CVE-2008-1554 represents a critical sql injection flaw within the TopperMod 2.0 web application framework. This vulnerability specifically targets the account/index.php script where user input is processed without adequate sanitization measures. The flaw becomes particularly dangerous when the web server configuration has magic_quotes_gpc disabled, a common scenario in many production environments. The vulnerability's exploitation mechanism relies on a sophisticated bypass technique that leverages the first character of the localita parameter to circumvent existing protection mechanisms. This bypass occurs when the initial character of the parameter is non-alphanumeric, allowing attackers to inject malicious sql code that would otherwise be filtered by standard input validation routines.
The technical implementation of this vulnerability stems from improper input validation and sanitization practices within the application's codebase. When magic_quotes_gpc is disabled, the application fails to properly escape special sql characters in user-supplied input, creating an opening for malicious actors to manipulate database queries. The specific bypass technique exploits the fact that the protection mechanism only validates alphanumeric characters at the beginning of the parameter, allowing attackers to prefix their malicious sql payloads with non-alphanumeric characters such as quotes, semicolons, or other sql metacharacters. This creates a scenario where the application's input filtering is effectively circumvented, enabling complete sql injection capabilities. The vulnerability maps directly to CWE-89 which defines sql injection as the insertion of malicious sql code into input fields for execution by the database.
The operational impact of this vulnerability extends far beyond simple data theft, as it provides attackers with complete database access and control. Successful exploitation allows remote attackers to execute arbitrary sql commands against the underlying database, potentially leading to data exfiltration, data modification, privilege escalation, or even complete system compromise. Attackers can leverage this vulnerability to extract sensitive user information, modify database records, create new user accounts with administrative privileges, or execute destructive operations on the database. The bypass mechanism makes this vulnerability particularly insidious as it can evade many standard security controls and intrusion detection systems that rely on signature-based detection methods. This vulnerability aligns with attack patterns documented in the attack technique matrix under techniques such as T1071.004 for application layer protocol and T1213.002 for data from information repositories.
Mitigation strategies for this vulnerability must address both the immediate code-level fixes and broader architectural security improvements. The primary remediation involves implementing proper input validation and sanitization techniques, including the use of parameterized queries or prepared statements that separate sql code from data. Organizations should ensure that magic_quotes_gpc is properly configured or that applications implement robust input filtering regardless of server configuration. The application code must be updated to validate all user input parameters, particularly those used in database queries, and reject or escape non-alphanumeric characters in positions that could enable sql injection attacks. Security measures should include regular code reviews focusing on input handling, implementation of web application firewalls, and deployment of automated vulnerability scanning tools to identify similar flaws across the application stack. Additionally, implementing proper access controls and database privilege management can limit the damage from successful exploitation attempts. The vulnerability underscores the importance of defense-in-depth strategies and the need for comprehensive security testing throughout the software development lifecycle to prevent similar issues from arising in future versions of the application.