CVE-2009-3817 in Com Booklibrary
Summary
by MITRE
PHP remote file inclusion vulnerability in doc/releasenote.php in the BookLibrary (com_booklibrary) component 1.0 for Joomla! allows remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter, a different vector than CVE-2009-2637. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 06/14/2025
The CVE-2009-3817 vulnerability represents a critical remote file inclusion flaw within the BookLibrary component version 1.0 for Joomla website security. The vulnerability operates through a distinct attack vector compared to CVE-2009-2637, indicating a separate code path that can be exploited for malicious purposes. This type of vulnerability falls under the category of remote code execution threats that can compromise entire web applications and potentially lead to full system compromise.
The technical implementation of this vulnerability stems from improper input validation and parameter handling within the Joomla! component. When the mosConfig_absolute_path parameter is not properly sanitized, attackers can inject malicious URLs that get processed by the PHP interpreter. This creates a condition where user-supplied input directly influences the file inclusion mechanism, allowing attackers to load and execute arbitrary PHP scripts from remote servers. The vulnerability demonstrates poor secure coding practices and inadequate sanitization of user inputs, which aligns with CWE-94, the Common Weakness Enumeration category for "Improper Control of Generation of Code ('Code Injection')." The flaw essentially allows attackers to bypass normal access controls and execute malicious code with the privileges of the web server process.
From an operational impact perspective, this vulnerability poses severe risks to Joomla! websites running the affected BookLibrary component. Successful exploitation can result in complete system compromise, data theft, defacement, or the installation of backdoors for persistent access. Attackers can leverage this vulnerability to gain unauthorized access to sensitive information, manipulate website content, and potentially use the compromised system as a launch point for further attacks against the internal network. The remote nature of the exploit means that attackers do not need physical access to the system and can target vulnerable websites from anywhere on the internet. This vulnerability directly impacts the CIA triad by compromising confidentiality, integrity, and availability of the affected systems, as noted in the ATT&CK framework under the "Remote Code Execution" technique.
Mitigation strategies for CVE-2009-3817 should focus on immediate patching and configuration hardening. Organizations must upgrade to the latest versions of the BookLibrary component and Joomla! platform to receive security fixes from the vendor. Input validation should be implemented to sanitize all user-supplied parameters, particularly those used in file inclusion operations. The principle of least privilege should be enforced by running web applications with minimal necessary permissions and implementing proper access controls. Network segmentation and intrusion detection systems can help detect exploitation attempts, while regular security audits and penetration testing should be conducted to identify similar vulnerabilities. Additionally, implementing web application firewalls and content security policies can provide additional layers of protection against such attacks. The vulnerability highlights the importance of maintaining up-to-date software components and following secure coding practices to prevent similar issues in the future.