CVE-2009-2637 in Com Booklibrary
Summary
by MITRE
PHP remote file inclusion vulnerability in toolbar_ext.php in the BookLibrary (com_booklibrary) component 1.5.2.4 Basic for Joomla! allows remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter.
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Analysis
by VulDB Data Team • 12/01/2024
The vulnerability identified as CVE-2009-2637 represents a critical remote file inclusion flaw within the BookLibrary component for Joomla installations.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL containing a remote file reference that gets processed by the vulnerable component. The mosConfig_absolute_path parameter serves as the attack vector where unvalidated user input is directly incorporated into file inclusion operations. When the application processes this parameter without proper sanitization or validation, it allows the attacker to specify any remote URL that contains malicious PHP code. This code execution capability enables adversaries to perform a wide range of malicious activities including data exfiltration, server compromise, and establishment of persistent backdoors within the Joomla installations.
The operational impact of CVE-2009-2637 extends beyond simple code execution to encompass complete system compromise and data breach potential. Organizations running vulnerable Joomla! installations face risks of unauthorized access to sensitive data, modification of website content, and potential use as a launching point for further attacks within network infrastructure. The vulnerability's remote nature means that attackers can exploit it from anywhere on the internet without requiring local access or authentication credentials. This characteristic makes it particularly dangerous as it can be exploited by automated scanning tools and botnets targeting vulnerable systems. The attack chain typically involves reconnaissance to identify vulnerable installations followed by exploitation to gain initial access, which can then be leveraged for privilege escalation and lateral movement within compromised environments. This vulnerability directly maps to several ATT&CK techniques including T1190 for Exploit Public-Facing Application and T1059 for Command and Scripting Interpreter, demonstrating how such flaws can enable broader attack campaigns.
Mitigation strategies for CVE-2009-2637 must address both immediate remediation and long-term security improvements. The most effective immediate solution involves upgrading to patched versions of the BookLibrary component and Joomla! core, as the vulnerability was resolved in subsequent releases. Organizations should also implement input validation and sanitization measures to prevent similar issues in other applications, particularly focusing on parameter validation for file inclusion operations. Network-level protections such as web application firewalls and intrusion detection systems can provide additional layers of defense by monitoring for suspicious URL patterns and blocking known malicious payloads. Security configuration practices including disabling remote file inclusion capabilities, restricting file upload permissions, and implementing proper access controls should be enforced. Additionally, regular security audits and vulnerability assessments help identify similar weaknesses in other components and ensure comprehensive protection against exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date software versions and implementing robust security practices to prevent exploitation of known vulnerabilities that can lead to complete system compromise.