CVE-2005-2139 in Pavsta Auto Site
Summary
by MITRE
PHP remote file inclusion vulnerability in user_check.php for Pavsta Auto Site allows remote attackers to execute arbitrary PHP code via the sitepath parameter.
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Analysis
by VulDB Data Team • 07/25/2017
The vulnerability identified as CVE-2005-2139 represents a critical remote file inclusion flaw affecting the Pavsta Auto Site application's user_check.php component. This issue stems from improper input validation and sanitization mechanisms that fail to properly restrict user-supplied data from being processed as file paths. The vulnerability specifically manifests when the sitepath parameter is manipulated by an attacker, allowing unauthorized execution of arbitrary PHP code on the target system. Such a flaw directly enables attackers to inject malicious code that can be executed within the context of the web server, potentially leading to complete system compromise.
The technical nature of this vulnerability aligns with CWE-88, which describes improper neutralization of special elements used in an OS command, and CWE-94, which addresses execution of arbitrary code. The flaw operates through a classic remote file inclusion attack vector where an attacker can manipulate the sitepath parameter to include malicious PHP scripts hosted on external servers. This vulnerability is particularly dangerous because it allows attackers to execute code with the privileges of the web server process, potentially enabling them to access sensitive data, modify application functionality, or establish persistent access to the compromised system.
The operational impact of this vulnerability extends beyond simple code execution, as it can enable attackers to perform a wide range of malicious activities including data theft, privilege escalation, and system reconnaissance. Attackers can leverage this vulnerability to upload backdoors, establish command and control channels, or access database credentials stored within the application environment. The remote nature of the attack means that exploitation can occur from anywhere on the internet without requiring physical access to the target system, making it particularly attractive to automated attack tools and script kiddies. According to ATT&CK framework, this vulnerability maps to T1190 for Exploit Public-Facing Application and T1059 for Command and Scripting Interpreter, highlighting the multi-stage attack methodology that can be employed.
Mitigation strategies for CVE-2005-2139 should focus on implementing proper input validation and sanitization measures within the application code. The most effective approach involves eliminating the use of user-supplied data in file inclusion operations and instead implementing a whitelist-based system that only allows predefined, trusted paths. Additionally, disabling remote file inclusion capabilities in PHP configuration through the use of the allow_url_include directive set to off can prevent exploitation. Regular security auditing of application code, implementation of proper parameter validation, and maintaining up-to-date security patches are essential defensive measures. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts targeting this specific vulnerability class. The vulnerability underscores the importance of secure coding practices and proper input handling, particularly in applications that process user data for dynamic content generation.