CVE-2009-4550 in Kunena Forum
Summary
by MITRE
SQL injection vulnerability in the Kunena Forum (com_kunena) component 1.5.3 and 1.5.4 for Joomla! allows remote attackers to execute arbitrary SQL commands via the func parameter to index.php.
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Analysis
by VulDB Data Team • 12/08/2024
The CVE-2009-4550 vulnerability represents a critical sql injection flaw within the Kunena Forum component for Joomla! versions 1.5.3 and 1.5.4. This vulnerability specifically targets the func parameter in the index.php file, creating a pathway for remote attackers to execute arbitrary sql commands against the underlying database. The issue stems from insufficient input validation and sanitization within the component's parameter handling mechanism, allowing malicious actors to inject sql payload directly into the application's query execution flow.
The technical exploitation of this vulnerability occurs through the manipulation of the func parameter which is processed without adequate sanitization measures. When a user submits a request containing malicious sql code within the func parameter, the application fails to properly escape or validate the input before incorporating it into database queries. This design flaw aligns with common weakness enumeration CWE-89, which specifically addresses sql injection vulnerabilities where untrusted data is directly included in sql commands without proper filtering or escaping. The vulnerability enables attackers to perform unauthorized database operations including data extraction, modification, deletion, and potentially gaining administrative access to the forum system.
The operational impact of CVE-2009-4550 extends beyond simple data compromise as it provides attackers with elevated privileges within the affected Joomla! environment. Successful exploitation allows remote threat actors to bypass authentication mechanisms, escalate privileges, and access sensitive user data including passwords, personal information, and forum content. The vulnerability affects the entire forum infrastructure by enabling attackers to manipulate the database directly, potentially leading to complete system compromise. From an adversarial perspective, this vulnerability maps to several ATT&CK techniques including T1190 for exploitation of vulnerabilities and T1078 for valid accounts usage, as attackers can leverage the compromised system to maintain persistent access and conduct further reconnaissance.
Mitigation strategies for CVE-2009-4550 require immediate patching of the affected Kunena Forum component to versions that properly sanitize input parameters. Organizations should implement comprehensive input validation mechanisms that filter and escape all user-supplied data before processing, utilizing parameterized queries and prepared statements to prevent sql injection attacks. Network-level protections including web application firewalls and intrusion detection systems can provide additional defense-in-depth measures. Regular security assessments and vulnerability scanning should be conducted to identify similar issues within other components of the Joomla! platform. The vulnerability highlights the critical importance of maintaining up-to-date software components and implementing proper security coding practices as recommended by security standards such as OWASP Top Ten and NIST cybersecurity guidelines.