CVE-2008-2029 in miniBB
Summary
by MITRE
Multiple SQL injection vulnerabilities in (1) setup_mysql.php and (2) setup_options.php in miniBB 2.2 and possibly earlier, when register_globals is enabled, allow remote attackers to execute arbitrary SQL commands via the xtr parameter in a userinfo action to index.php.
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Analysis
by VulDB Data Team • 10/21/2024
The vulnerability described in CVE-2008-2029 represents a critical SQL injection flaw affecting miniBB version 2.2 and potentially earlier releases. This security weakness manifests in two distinct files within the application's setup functionality: setup_mysql.php and setup_options.php. The vulnerability becomes exploitable when the PHP configuration parameter register_globals is enabled, creating a dangerous condition where user-supplied input can directly influence the application's database interactions. The attack vector specifically targets the xtr parameter within the userinfo action of index.php, allowing remote attackers to inject malicious SQL commands that execute with the privileges of the database user.
The technical exploitation of this vulnerability stems from improper input validation and sanitization within the miniBB application's setup modules. When register_globals is enabled, PHP automatically creates global variables from request data, effectively bypassing normal input validation mechanisms. The xtr parameter in the userinfo action becomes a conduit for attackers to inject malicious SQL payloads that can manipulate the database structure, extract sensitive information, or even gain unauthorized access to the underlying database system. This flaw falls under the CWE-89 category of SQL Injection, which is classified as a high-risk vulnerability in the Common Weakness Enumeration framework. The vulnerability directly aligns with ATT&CK technique T1190 - Exploit Public-Facing Application, as it represents an attack against a web application component that is accessible over the network.
The operational impact of this vulnerability extends beyond simple data theft, as successful exploitation could lead to complete database compromise and potential system infiltration. Attackers could execute arbitrary commands on the database server, potentially leading to privilege escalation, data manipulation, or the installation of backdoors. The vulnerability's severity is amplified by its remote exploitability, meaning that attackers do not require physical access to the system or network privileges to launch attacks. Organizations running affected versions of miniBB with register_globals enabled face significant risk of unauthorized database access, data breaches, and potential system compromise. The flaw demonstrates poor input validation practices and highlights the dangers of enabling potentially dangerous PHP configuration options in production environments.
Mitigation strategies for this vulnerability must address both the immediate exploitation vector and underlying architectural issues. The primary recommendation involves disabling the register_globals PHP configuration option, which immediately neutralizes the attack path by preventing automatic creation of global variables from request data. Additionally, implementing proper input validation and parameterized queries in the affected setup files would prevent malicious SQL commands from being executed. Organizations should also consider upgrading to newer versions of miniBB that address these vulnerabilities, as version 2.2 and earlier releases contain multiple security weaknesses. Network-level protections such as web application firewalls can provide additional defense-in-depth measures, though they should not be relied upon as the sole mitigation. The vulnerability serves as a reminder of the critical importance of secure coding practices, proper input validation, and the dangers of legacy PHP configurations that can create exploitable conditions for attackers.