CVE-2002-1421 in FUDforum
Summary
by MITRE
SQL injection vulnerabilities in FUDforum before 2.2.0 allow remote attackers to perform unauthorized database operations via (1) report.php, (2) selmsg.php, and (3) showposts.php.
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Analysis
by VulDB Data Team • 07/01/2024
The vulnerability identified as CVE-2002-1421 represents a critical SQL injection flaw affecting FUDforum versions prior to 2.2.0. This vulnerability resides in three distinct script files within the forum application that handle user interactions and database queries. The affected scripts include report.php, selmsg.php, and showposts.php, all of which process user input without proper sanitization before incorporating it into SQL database operations. This fundamental security weakness allows malicious actors to manipulate the underlying database queries through crafted input parameters, potentially leading to unauthorized access, data manipulation, or complete database compromise. The vulnerability is classified under CWE-89 which specifically addresses SQL injection flaws where untrusted data is directly incorporated into SQL commands without adequate validation or escaping mechanisms. The attack surface is particularly concerning as these scripts are integral to forum functionality, handling user reporting, message selection, and post display operations that naturally involve user-provided data inputs.
The technical exploitation of this vulnerability occurs when remote attackers submit malicious input through the affected PHP scripts, which then get processed and executed as part of the SQL query construction. When the application fails to properly sanitize or escape user-supplied parameters, attackers can inject additional SQL commands that bypass authentication mechanisms or manipulate database records. The impact extends beyond simple data retrieval to potentially allow attackers to execute administrative commands, extract sensitive information, modify or delete database entries, and in severe cases gain complete control over the database server. This type of vulnerability aligns with ATT&CK technique T1071.005 which describes application layer protocol manipulation and T1046 which covers network service discovery. The vulnerability demonstrates poor input validation practices and inadequate parameter binding mechanisms that are standard security requirements for preventing injection attacks.
The operational impact of CVE-2002-1421 is significant for organizations using affected FUDforum versions, as it creates a persistent security risk that can be exploited by anyone with access to the forum's public interface. Attackers can leverage this vulnerability to compromise user accounts, steal sensitive information such as user credentials, personal data, or forum administration details. The vulnerability also poses risks to data integrity and availability, as malicious actors could potentially corrupt database contents or cause service disruptions through denial-of-service attacks. Organizations may face regulatory compliance issues if user data is compromised, and the reputational damage from successful exploitation can be substantial. The vulnerability's persistence across multiple scripts increases the attack surface and makes it more difficult to mitigate completely, requiring comprehensive patching of all affected components rather than isolated fixes. Database administrators and security teams must implement immediate remediation measures including software updates, input validation improvements, and monitoring for exploitation attempts.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security hardening. The primary and most effective solution involves upgrading to FUDforum version 2.2.0 or later where the SQL injection vulnerabilities have been properly addressed through input validation and parameterized query implementations. Organizations should also implement proper input sanitization measures including the use of prepared statements and parameterized queries to prevent similar vulnerabilities in other applications. Network-level protections such as web application firewalls can provide additional defense-in-depth measures, though they should not replace proper code-level fixes. Regular security assessments and code reviews should be conducted to identify and remediate similar injection vulnerabilities across the application stack. Security monitoring should include detection of unusual database query patterns and unauthorized access attempts that may indicate exploitation of this or similar vulnerabilities. The vulnerability serves as a reminder of the critical importance of secure coding practices and the necessity of following established security frameworks such as OWASP Top Ten and NIST guidelines for preventing injection attacks in web applications.