CVE-2006-4375 in Contacts Xtd Component
Summary
by MITRE
** DISPUTED ** PHP remote file inclusion vulnerability in contxtd.class.php in the Contacts XTD (ContXTD) component for Mambo (com_contxtd) allows remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter. NOTE: another researcher has disputed this issue, saying that the software prevents the attack by checking whether _VALID_MOS is defined.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 08/08/2024
The vulnerability described in CVE-2006-4375 represents a potential remote file inclusion flaw within the Contacts XTD component for Mambo CMS systems. This issue specifically targets the contxtd.class.php file where an insecure parameter handling mechanism exists in the mosConfig_absolute_path variable. The vulnerability classification aligns with CWE-88, which describes improper neutralization of special elements used in an expression, and falls under the broader category of CWE-94, which encompasses execution of arbitrary code. The attack vector leverages the remote execution of PHP code through manipulation of the mosConfig_absolute_path parameter, potentially allowing unauthorized actors to inject and execute malicious code on vulnerable systems.
The technical implementation of this vulnerability stems from inadequate input validation within the component's configuration handling. When the mosConfig_absolute_path parameter is processed without proper sanitization, it creates an opportunity for attackers to inject malicious URLs that point to remote code repositories. This flaw exploits the fundamental weakness in parameter validation where user-supplied data is directly incorporated into file inclusion operations. The vulnerability demonstrates a classic remote code execution pattern that has been documented in numerous similar CMS vulnerabilities throughout the years, making it a significant concern for system administrators managing legacy Mambo installations.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise potential. Attackers could leverage this weakness to establish persistent backdoors, exfiltrate sensitive data, or deploy additional malware payloads. The remote nature of the attack means that exploitation can occur from anywhere on the internet without requiring physical access to the target system. This characteristic makes the vulnerability particularly dangerous in environments where public-facing web applications are deployed. The potential for data breaches and system infiltration increases significantly when considering that many organizations may have legacy systems running unpatched versions of Mambo CMS components.
Security professionals should note that this vulnerability's status has been disputed by another researcher who claims that the software includes built-in protections against such attacks through the _VALID_MOS definition check. This disputed status highlights the complexity of vulnerability assessment and the importance of thorough validation before implementing remediation strategies. Organizations should conduct comprehensive testing to verify whether their specific installations are actually vulnerable or if the built-in protections are sufficient. The ATT&CK framework's T1190 technique for exploitation of remote services and T1059 for command and scripting interpreter usage applies to this vulnerability type. Mitigation strategies should include immediate patching of affected components, implementation of proper input validation, and consideration of web application firewalls to detect and block suspicious URL patterns. Additionally, organizations should review their entire Mambo CMS installation for similar vulnerabilities and ensure that all third-party components are regularly updated to address known security issues.