CVE-2007-6568 in Community Classifieds
Summary
by MITRE
PHP remote file inclusion vulnerability in config.inc.php in XZero Community Classifieds 4.95.11 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the path_escape parameter.
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Analysis
by VulDB Data Team • 10/13/2024
The vulnerability identified as CVE-2007-6568 represents a critical remote file inclusion flaw within the XZero Community Classifieds version 4.95.11 and earlier systems. This issue resides in the config.inc.php file where improper input validation allows attackers to inject malicious URLs through the path_escape parameter, creating an avenue for arbitrary code execution. The vulnerability stems from the application's failure to properly sanitize user-supplied input before using it in file inclusion operations, which directly violates fundamental secure coding principles.
This vulnerability operates under the Common Weakness Enumeration category CWE-98, which specifically addresses "Improper Control of Generation of Code ('Code Injection')" and falls within the broader context of insecure file handling practices. The flaw enables attackers to manipulate the application's behavior by injecting external URLs that get processed as file paths, potentially allowing execution of malicious PHP scripts hosted on remote servers. The impact extends beyond simple code execution to encompass complete system compromise when combined with other attack vectors, as demonstrated by various exploitation techniques documented in the ATT&CK framework under T1190 for "Exploit Public-Facing Application" and T1059 for "Command and Scripting Interpreter."
The operational impact of this vulnerability is severe as it provides remote attackers with the capability to execute arbitrary commands on the affected server, potentially leading to full system compromise, data exfiltration, and persistence mechanisms. Attackers can leverage this flaw to upload backdoors, establish reverse shells, or perform further reconnaissance activities within the network. The vulnerability affects not only the immediate application but can also serve as a stepping stone for broader network infiltration, particularly in environments where the classifieds application shares resources or network access with other systems. Organizations running affected versions face significant risk of unauthorized access and potential data breaches, with the attack surface extending to any functionality that relies on the vulnerable parameter handling.
Mitigation strategies for CVE-2007-6568 should prioritize immediate patching of the XZero Community Classifieds application to versions that address the input validation issues in config.inc.php. System administrators should implement input sanitization measures including strict parameter validation, whitelisting of allowed characters, and comprehensive output encoding to prevent malicious input from being processed as file paths. Network-level protections such as web application firewalls should be configured to monitor and block suspicious URL patterns in the path_escape parameter. Additionally, the principle of least privilege should be enforced by restricting file inclusion capabilities to only necessary functions and ensuring that the application runs with minimal required permissions. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other components of the application stack, with security monitoring systems deployed to detect anomalous file access patterns that may indicate exploitation attempts.