CVE-2009-1625 in Thickbox Gallery
Summary
by MITRE
Directory traversal vulnerability in index.php in Thickbox Gallery 2 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the ln parameter.
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Analysis
by VulDB Data Team • 11/27/2024
The vulnerability described in CVE-2009-1625 represents a classic directory traversal flaw within the Thickbox Gallery 2 web application. This issue specifically affects the index.php script where user input is not properly sanitized before being used to include local files. The vulnerability stems from the application's failure to validate or filter the ln parameter which is used to determine which file to include and execute. When an attacker supplies a .. (dot dot) sequence in the ln parameter, the application processes this input without proper validation, allowing access to files outside the intended directory structure.
This directory traversal vulnerability falls under the CWE-22 category, which classifies it as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')". The flaw enables attackers to manipulate the file inclusion mechanism and potentially access sensitive system files, configuration data, or other resources that should remain protected. The attack vector is particularly dangerous because it allows remote execution of arbitrary local files, making it a severe security risk for any web application that processes user input for file operations.
The operational impact of this vulnerability extends beyond simple information disclosure. Attackers can leverage this weakness to execute arbitrary code on the affected system, potentially leading to complete system compromise. The vulnerability affects web applications that use the Thickbox Gallery 2 plugin, which is commonly found in content management systems and web applications that handle media file display. When exploited, this vulnerability can result in unauthorized access to server files, data theft, system hijacking, and potential lateral movement within network environments. The remote nature of the attack means that exploitation does not require physical access to the system, making it particularly dangerous for publicly accessible web applications.
Mitigation strategies for CVE-2009-1625 should focus on implementing proper input validation and sanitization mechanisms. The most effective approach involves implementing strict parameter validation that prevents any occurrence of directory traversal sequences such as .. or %2e%2e in user-supplied input. Additionally, applications should employ secure coding practices that utilize whitelisting approaches for file operations, ensuring that only predetermined, safe file paths are accessible. Organizations should also implement proper access controls and privilege separation to limit the damage that could occur if such vulnerabilities are exploited. The ATT&CK framework categorizes this type of vulnerability under T1059.007 for "Command and Scripting Interpreter: PowerShell" and T1068 for "Exploitation for Privilege Escalation" when considering the potential for privilege escalation through file inclusion attacks. Regular security updates and patch management processes should be implemented to ensure that vulnerable components are promptly addressed. System administrators should also consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts and provide additional layers of defense against such attacks.