CVE-2007-6657 in Multi Host
Summary
by MITRE
PHP remote file inclusion vulnerability in source/includes/load_forum.php in Mihalism Multi Forum Host 3.0.x and earlier allows remote attackers to execute arbitrary PHP code via a URL in the mfh_root_path parameter.
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Analysis
by VulDB Data Team • 10/13/2024
The vulnerability described in CVE-2007-6657 represents a critical remote file inclusion flaw within the Mihalism Multi Forum Host 3.0.x software ecosystem. This vulnerability exists in the load_forum.php file located within the source/includes directory structure, where the application fails to properly validate user input before incorporating external resources into its execution flow. The flaw specifically manifests when the mfh_root_path parameter is manipulated by an attacker, allowing unauthorized code execution through remote file inclusion techniques that bypass normal security boundaries.
This vulnerability falls under the category of CWE-88, which describes improper neutralization of special elements used in an expression, specifically in the context of remote file inclusion attacks. The technical implementation of this flaw demonstrates how the application directly incorporates user-supplied input into its include statement without adequate sanitization or validation mechanisms. When an attacker supplies a malicious URL through the mfh_root_path parameter, the application treats this input as a legitimate resource path and attempts to execute the contents of that remote resource, effectively allowing arbitrary code execution on the target system.
The operational impact of this vulnerability extends beyond simple code execution, creating a pathway for attackers to gain complete control over the affected server. An attacker can leverage this vulnerability to upload and execute malicious scripts, potentially establishing persistent backdoors, exfiltrating sensitive data, or using the compromised system as a launch point for further attacks within the network infrastructure. The remote nature of this vulnerability means that exploitation can occur from anywhere on the internet without requiring local access or authentication, making it particularly dangerous for publicly accessible web applications. This type of vulnerability aligns with ATT&CK technique T1190, which describes exploiting vulnerabilities in remote services to gain initial access to target systems.
Mitigation strategies for this vulnerability require immediate implementation of input validation and sanitization measures at the application level. Organizations should ensure that all user-supplied parameters are rigorously validated and that any external resource inclusion is performed through secure, predefined whitelisting mechanisms rather than dynamic user input. The most effective remediation involves upgrading to a patched version of the Mihalism Multi Forum Host software, as the vulnerability was addressed in subsequent releases. Additionally, implementing proper web application firewalls, disabling remote file inclusion features in php.ini configuration, and employing strict input validation routines can provide defense-in-depth measures against similar vulnerabilities. Security monitoring should also include detection of unusual include patterns and unauthorized file access attempts that may indicate exploitation attempts.