CVE-2008-6842 in Pluck
Summary
by MITRE
Directory traversal vulnerability in data/modules/blog/module_pages_site.php in Pluck 4.6.1 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the post parameter.
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Analysis
by VulDB Data Team • 11/25/2024
The vulnerability identified as CVE-2008-6842 represents a critical directory traversal flaw within the Pluck content management system version 4.6.1. This security weakness exists in the module_pages_site.php file located within the data/modules/blog directory structure, creating a pathway for remote attackers to manipulate file inclusion mechanisms. The vulnerability specifically manifests when the application fails to properly validate or sanitize user-supplied input passed through the post parameter, allowing malicious actors to exploit the system's file handling capabilities.
The technical exploitation of this vulnerability relies on the manipulation of directory traversal sequences using the .. (dot dot) notation to navigate outside the intended directory boundaries. When the post parameter contains directory traversal sequences, the vulnerable application processes these inputs without adequate sanitization, enabling attackers to specify arbitrary local file paths. This flaw directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability essentially allows an attacker to bypass normal access controls and potentially access sensitive files or execute arbitrary code on the affected system.
The operational impact of CVE-2008-6842 extends beyond simple file access, as it can lead to complete system compromise when combined with other attack vectors. Remote attackers can leverage this vulnerability to include and execute local files, potentially gaining unauthorized access to system resources, reading sensitive configuration files, or executing malicious code with the privileges of the web application. This type of vulnerability falls under the ATT&CK technique T1059, specifically targeting remote code execution through web application vulnerabilities. The attack surface is particularly concerning for web applications that process user input without proper validation, as it can result in data breaches, system compromise, and potential lateral movement within network environments.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and sanitization mechanisms. The most effective approach involves implementing strict parameter validation that rejects or removes directory traversal sequences from user input before processing. Additionally, applications should employ secure coding practices such as using whitelisting mechanisms, implementing proper access controls, and ensuring that file operations occur within predefined safe directories. Organizations should also consider implementing web application firewalls to detect and block suspicious directory traversal attempts. The vulnerability highlights the importance of following secure coding guidelines and conducting regular security assessments to identify and remediate similar weaknesses in web applications, particularly those involving file inclusion and user input handling operations.