CVE-2007-4737 in PHP Library
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in SpeedTech PHP Library (STPHPLibrary) 0.8.0 allow remote attackers to execute arbitrary PHP code via a URL in the STPHPLIB_DIR parameter to (1) stphpapplication.php, (2) stphpbtnimage.php, or (3) stphpform.php.
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Analysis
by VulDB Data Team • 10/05/2024
The CVE-2007-4737 vulnerability represents a critical remote file inclusion flaw affecting the SpeedTech PHP Library version 0.8.0. This vulnerability resides in the library's handling of user-supplied input parameters, specifically the STPHPLIB_DIR parameter, which is processed in three core files: stphpapplication.php, stphpbtnimage.php, and stphpform.php. The flaw enables attackers to inject malicious URLs that are subsequently included and executed as PHP code on the target server. This type of vulnerability is classified under CWE-88, which describes improper neutralization of special elements used in an OS command, and more specifically aligns with CWE-94, which covers inadequate control of generation of code. The vulnerability demonstrates a classic lack of input validation and sanitization that allows attackers to manipulate the application's execution flow through parameter injection.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL and passes it as the STPHPLIB_DIR parameter to any of the three affected PHP files. When the application processes this parameter without proper validation, it directly includes the remote file specified in the URL, executing any PHP code contained within that file. This creates a remote code execution vector that allows attackers to gain arbitrary code execution capabilities on the affected server. The vulnerability is particularly dangerous because it operates at the application layer and can be exploited through standard web requests, making it accessible to attackers with minimal technical expertise. From an operational perspective, this vulnerability represents a severe risk to web application security and aligns with ATT&CK technique T1190, which covers exploitation of remote services, and T1059, which covers command and scripting interpreter execution.
The impact of this vulnerability extends beyond simple code execution to encompass complete system compromise. Attackers can leverage this flaw to upload and execute malicious payloads, establish persistent backdoors, and potentially escalate privileges within the affected environment. The vulnerability affects any system running SpeedTech PHP Library 0.8.0 and exposes the underlying web server to unauthorized access and control. Organizations with vulnerable systems face significant operational risks including data breaches, service disruption, and compliance violations. The vulnerability's exploitation can lead to complete server compromise, allowing attackers to access sensitive data, modify application behavior, and use the compromised system as a launch point for further attacks within the network infrastructure. Security teams must prioritize patching this vulnerability immediately, as it provides attackers with an unauthenticated path to execute arbitrary code and potentially gain full system control.
Mitigation strategies for CVE-2007-4737 focus on both immediate remediation and long-term security hardening. The primary solution involves upgrading to a patched version of the SpeedTech PHP Library, as version 0.8.0 contains the vulnerable code that permits direct file inclusion based on user input. Organizations should implement proper input validation and sanitization measures, ensuring that all user-supplied parameters are rigorously checked before being used in file inclusion operations. The implementation of PHP's open_basedir directive can help restrict file inclusion to specific directories, preventing access to arbitrary files on the system. Additionally, disabling remote file inclusion capabilities in PHP configuration and employing web application firewalls can provide additional layers of protection. Security practices should include regular vulnerability assessments, code reviews focusing on file inclusion patterns, and implementing principle of least privilege access controls. Organizations should also monitor for exploitation attempts through log analysis and network traffic inspection to detect potential attacks targeting this vulnerability. The remediation process must include thorough testing to ensure that the patch does not introduce regressions in application functionality while maintaining the security posture against similar remote file inclusion vulnerabilities.