CVE-2005-3518 in PunBB
Summary
by MITRE
SQL injection vulnerability in search.php in PunBB 1.2.7 and 1.2.8 allows remote attackers to execute arbitrary SQL commands via the old_searches parameter.
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Analysis
by VulDB Data Team • 11/07/2025
The vulnerability identified as CVE-2005-3518 represents a critical SQL injection flaw within the PunBB forum software version 1.2.7 and 1.2.8. This issue specifically affects the search.php script where user input is not properly sanitized before being incorporated into database queries. The vulnerability manifests through the old_searches parameter which is processed without adequate validation or escaping mechanisms, creating an avenue for malicious actors to manipulate the underlying database operations. The flaw resides in the application's failure to implement proper input sanitization techniques, allowing attackers to inject malicious SQL code that executes with the privileges of the database user account.
From a technical perspective, this vulnerability maps directly to CWE-89 which categorizes SQL injection as a condition where user-supplied data is improperly incorporated into SQL command strings without proper escaping or parameterization. The attack vector requires remote access to the vulnerable system and leverages the lack of input validation in the old_searches parameter to construct malicious SQL payloads. When an attacker submits crafted input through this parameter, the application processes the data directly within SQL queries, bypassing any intended security controls and allowing full database manipulation capabilities. The vulnerability demonstrates a classic improper input validation issue that violates fundamental security principles of data sanitization and query parameterization.
The operational impact of this vulnerability extends beyond simple data theft to encompass complete database compromise and potential system takeover. Attackers can leverage this flaw to extract sensitive information including user credentials, personal data, and forum configurations. The vulnerability also enables privilege escalation attacks where malicious actors can modify database contents, create new user accounts, or even execute administrative commands on the database server. Given that PunBB forums often contain user-generated content and personal information, the potential for data breaches and unauthorized access is substantial. The remote nature of the attack means that exploitation can occur from anywhere on the internet without requiring physical access to the target system, making this vulnerability particularly dangerous for publicly accessible forum installations.
Mitigation strategies for CVE-2005-3518 should prioritize immediate patching of the affected PunBB versions to the latest secure releases that address the input sanitization issues. Organizations should implement proper parameterized queries and prepared statements to prevent SQL injection attacks, ensuring that all user inputs are properly escaped or parameterized before database processing. Input validation should be enforced at multiple levels including application logic and database layer controls to provide defense in depth. Network segmentation and access controls should limit exposure of vulnerable systems to reduce attack surface. Additionally, regular security audits and code reviews should be conducted to identify similar vulnerabilities in other applications, with adherence to secure coding practices that align with industry standards such as those outlined in the OWASP Top Ten and NIST guidelines for secure software development. The vulnerability also highlights the importance of maintaining up-to-date software versions and implementing automated patch management systems to prevent exploitation of known vulnerabilities.