CVE-2007-1048 in Phpbb Wordsearch
Summary
by MITRE
PHP remote file inclusion vulnerability in admin_rebuild_search.php in phpbb_wordsearch allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.
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Analysis
by VulDB Data Team • 10/13/2017
The vulnerability identified as CVE-2007-1048 represents a critical remote file inclusion flaw in the phpbb_wordsearch application, specifically within the admin_rebuild_search.php script. This vulnerability falls under the category of insecure direct object references and remote code execution, creating a significant security risk for affected systems. The flaw arises from inadequate input validation and sanitization of the phpbb_root_path parameter, which is used to construct file paths during the search rebuilding process. Attackers can exploit this weakness by manipulating the parameter to include malicious URLs, thereby enabling arbitrary code execution on the target server. The vulnerability is particularly dangerous because it allows remote attackers to execute PHP code without authentication, potentially leading to complete system compromise.
The technical implementation of this vulnerability stems from the application's failure to properly validate user-supplied input before incorporating it into file system operations. When the phpbb_root_path parameter is processed, the application directly uses the provided value to construct file paths without adequate sanitization or validation checks. This creates an environment where attackers can inject malicious URLs that point to remote servers hosting malicious PHP code. The vulnerability is classified as a CWE-98 weakness, which specifically addresses the inclusion of files without proper validation, and aligns with ATT&CK technique T1190 for exploiting vulnerabilities in web applications. The flaw demonstrates poor input handling practices and lacks proper access controls, making it an attractive target for automated exploitation tools.
The operational impact of this vulnerability extends beyond simple code execution, as it can lead to complete system compromise and data breaches. Successful exploitation allows attackers to execute arbitrary commands on the affected server, potentially leading to unauthorized access to sensitive data, modification of web content, or even the installation of backdoors for persistent access. The vulnerability affects systems running vulnerable versions of phpbb_wordsearch, which was a popular forum software component, making it a widespread target. Organizations using affected software versions face risks of reputational damage, regulatory compliance violations, and potential legal consequences due to data exposure. The remote nature of the attack means that exploitation can occur from anywhere on the internet without requiring physical access to the target network, making it particularly dangerous for organizations without proper network segmentation or intrusion detection systems.
Mitigation strategies for CVE-2007-1048 should focus on immediate patching of the vulnerable application, along with implementing comprehensive input validation and sanitization measures. System administrators should update to the latest patched versions of phpbb_wordsearch or apply the vendor-provided security patches as soon as possible. Network-level protections such as web application firewalls and intrusion prevention systems can help detect and block exploitation attempts. Additionally, implementing proper input validation that rejects suspicious characters and URLs in parameters like phpbb_root_path can prevent exploitation. Organizations should also consider disabling remote file inclusion features in their PHP configurations and implementing strict access controls. The vulnerability highlights the importance of following secure coding practices and adhering to security standards such as those outlined in the OWASP Top Ten and NIST cybersecurity guidelines to prevent similar issues in future development cycles. Regular security audits and penetration testing should be conducted to identify and remediate similar vulnerabilities before they can be exploited by malicious actors.