CVE-2006-4203 in Mambo Email Publisher
Summary
by MITRE
PHP remote file inclusion vulnerability in help.mmp.php in the MMP Component (com_mmp) 1.2 and earlier for Mambo allows remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter.
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Analysis
by VulDB Data Team • 07/14/2024
The vulnerability identified as CVE-2006-4203 represents a critical remote file inclusion flaw within the MMP Component version 1.2 and earlier for the Mambo content management system. This vulnerability resides in the help.mmp.php file and demonstrates a classic insecure direct object reference pattern that enables attackers to manipulate input parameters and execute malicious code remotely. The flaw specifically targets the mosConfig_absolute_path parameter which is used to construct file paths within the application, creating an opportunity for attackers to inject arbitrary URLs that will be included and executed as PHP code.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the Mambo component's parameter handling mechanism. When the mosConfig_absolute_path parameter is passed to the help.mmp.php script without proper validation, the application treats it as a legitimate path specification and attempts to include the referenced file. This behavior aligns with CWE-434, which describes insecure file inclusion vulnerabilities where applications accept user input that determines which files to include or execute. The vulnerability exists because the application does not properly verify the source or legitimacy of the path parameter, allowing attackers to specify external URLs that contain malicious PHP code.
From an operational impact perspective, this vulnerability creates a severe security risk for affected Mambo installations, as it provides attackers with remote code execution capabilities without requiring authentication. The attacker can leverage this vulnerability to execute arbitrary commands on the target server, potentially leading to complete system compromise. The attack vector is particularly dangerous because it requires minimal privileges and can be exploited through web-based interfaces, making it accessible to attackers with basic web security knowledge. This vulnerability directly maps to ATT&CK technique T1059.007 for Command and Scripting Interpreter, where adversaries use PHP code execution to run malicious commands on compromised systems.
The exploitation of this vulnerability typically involves crafting a malicious URL that points to a remote server hosting attacker-controlled PHP code, which is then included and executed by the vulnerable application. This allows attackers to perform various malicious activities including data theft, system reconnaissance, privilege escalation, and establishing persistent access through backdoor creation. The vulnerability affects all versions of the MMP Component up to and including version 1.2, making it a widespread issue within the Mambo ecosystem. Organizations running affected versions face significant risk of unauthorized access and potential data breaches, as the vulnerability can be exploited through automated scanning tools that target known vulnerable components.
Mitigation strategies for this vulnerability should include immediate patching of the affected component to version 1.3 or later where the vulnerability has been addressed through proper input validation and parameter sanitization. System administrators should also implement proper input validation mechanisms that restrict file inclusion to predefined safe paths and reject external URL references. Network-based protections such as web application firewalls can help detect and block malicious requests attempting to exploit this vulnerability. Additionally, regular security assessments and vulnerability scanning should be conducted to identify and remediate similar issues within the application stack. The remediation process should also include disabling unnecessary file inclusion features and implementing proper access controls to limit the impact of potential exploitation attempts.