CVE-2008-2116 in Power Editor
Summary
by MITRE
Multiple directory traversal vulnerabilities in editor.php in ScriptsEZ.net Power Editor 2.0 allow remote attackers to read arbitrary local files via a .. (dot dot) in the (1) te and (2) dir parameters in a tempedit action.
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Analysis
by VulDB Data Team • 10/21/2024
The vulnerability identified as CVE-2008-2116 represents a critical directory traversal flaw within the Power Editor 2.0 content management system developed by ScriptsEZ.net. This vulnerability exists in the editor.php script and specifically affects the temporary editing functionality that allows users to manipulate files within the system. The flaw manifests when the application fails to properly validate or sanitize user-supplied input parameters, creating an opportunity for malicious actors to access unauthorized files on the server filesystem. The vulnerability impacts two distinct parameter fields, namely 'te' and 'dir', both of which are processed during the 'tempedit' action, making it particularly concerning as it affects multiple attack vectors within the same functionality.
The technical nature of this vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. Attackers can exploit this weakness by crafting malicious URLs that contain double dot sequences or similar path manipulation techniques in the affected parameters. When the application processes these inputs without proper validation, it allows the attacker to navigate through the file system hierarchy and access files that should remain protected or restricted. This can potentially lead to exposure of sensitive information such as configuration files, database credentials, source code, or other confidential data stored on the server.
The operational impact of this vulnerability is severe and multifaceted, as it provides remote attackers with the capability to read arbitrary local files on the affected system. This can result in information disclosure, potentially exposing sensitive data such as database connection strings, application configuration files, or even source code that may contain additional vulnerabilities. The remote nature of the attack means that an attacker does not require physical access to the system or local network privileges, making the vulnerability particularly dangerous. Furthermore, this vulnerability could serve as a stepping stone for more sophisticated attacks, as the leaked information might reveal system architecture details, authentication mechanisms, or other sensitive components that could be leveraged for privilege escalation or lateral movement within the network. The vulnerability also violates fundamental security principles of least privilege and input validation, as it allows unauthorized file access through simple parameter manipulation.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and sanitization mechanisms within the Power Editor application. The most effective immediate fix involves implementing proper parameter validation that rejects or sanitizes any input containing directory traversal sequences such as '..' or similar path manipulation attempts. Organizations should also consider implementing proper access controls and privilege separation to ensure that file system access is restricted to legitimate operations only. Additionally, the application should employ proper path normalization techniques that resolve absolute paths and prevent traversal beyond intended directories. From a defensive perspective, implementing web application firewalls and intrusion detection systems can help detect and block malicious attempts to exploit this vulnerability. Regular security audits and code reviews should be conducted to identify similar weaknesses in other components of the application. This vulnerability serves as a reminder of the critical importance of input validation and proper access controls, principles that are fundamental to the MITRE ATT&CK framework's defensive strategies and align with the security best practices recommended in industry standards such as OWASP Top Ten and NIST cybersecurity guidelines.