CVE-2007-0487 in archer
Summary
by MITRE
** DISPUTED ** PHP remote file inclusion vulnerability in index.php in FreeForum 0.9.0 allows remote attackers to execute arbitrary PHP code via a URL in the fpath parameter. NOTE: this issue has been disputed by third party researchers, stating that fpath variable is initialized before being used.
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Analysis
by VulDB Data Team • 08/07/2024
The vulnerability identified as CVE-2007-0487 resides within the FreeForum 0.9.0 application and represents a classic remote file inclusion flaw that could potentially enable arbitrary code execution. This issue manifests in the index.php script where the fpath parameter is processed without adequate validation, creating an avenue for malicious actors to inject and execute unauthorized PHP code. The vulnerability's disputed nature stems from conflicting interpretations of how the fpath variable is initialized and utilized within the application's codebase, with third-party researchers questioning the original assessment of the flaw's existence.
The technical mechanism underlying this vulnerability aligns with CWE-88, which describes improper neutralization of argument separators in a command or call, and more specifically CWE-94, which encompasses the execution of arbitrary code due to insufficient input validation. When a remote attacker provides a malicious URL through the fpath parameter, the application fails to properly sanitize or validate this input before incorporating it into the execution flow. This allows the attacker to specify external resources that are then included and executed within the context of the web server process, effectively granting them remote code execution capabilities.
From an operational standpoint, this vulnerability presents a significant risk to systems running FreeForum 0.9.0, as it enables attackers to execute arbitrary commands on the affected server with the privileges of the web application. The impact extends beyond simple code execution to potentially allow full system compromise, data exfiltration, and establishment of persistent backdoors. Attackers could leverage this vulnerability to deploy web shells, scan internal networks, or escalate privileges within the compromised environment. The vulnerability's remote nature means that exploitation can occur from anywhere on the internet without requiring local access or authentication.
The attack surface for this vulnerability is particularly concerning as it operates at the application layer and requires minimal prerequisites for exploitation. The ATT&CK framework categorizes this as a remote code execution technique that can be leveraged for initial access or privilege escalation. Organizations should consider implementing network segmentation, web application firewalls, and input validation controls to mitigate the risk. The disputed nature of this vulnerability underscores the importance of thorough code review and independent verification of security assessments. Proper mitigation strategies include disabling remote file inclusion features, implementing strict input validation, and ensuring that all user-supplied parameters are properly sanitized before being processed by the application. Additionally, maintaining up-to-date software versions and conducting regular security assessments can help identify and remediate similar vulnerabilities in the application codebase.