CVE-2006-0371 in RCBlog
Summary
by MITRE
Directory traversal vulnerability in index.php in Noah Medling RCBlog 1.03 allows remote attackers to read arbitrary .txt files, possibly including one that stores the administrator s account name and password, via a .. (dot dot) in the post parameter.
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Analysis
by VulDB Data Team • 06/13/2019
The vulnerability identified as CVE-2006-0371 represents a critical directory traversal flaw within the Noah Medling RCBlog 1.03 web application. This security weakness exists in the index.php script where user input is improperly validated and sanitized before being processed. The vulnerability specifically manifests when the application fails to adequately filter the post parameter, allowing malicious actors to manipulate file paths through the use of directory traversal sequences such as .. (dot dot). This flaw falls under the category of CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The technical implementation of this vulnerability enables remote attackers to access arbitrary files on the web server by crafting malicious requests that exploit the lack of proper input validation. When an attacker submits a request containing directory traversal sequences in the post parameter, the application processes these sequences without adequate sanitization, potentially allowing access to sensitive files including configuration files, database files, or in this case, files that may contain administrator credentials. The exploitation mechanism leverages the web server's file system access capabilities to navigate directories beyond the intended scope of the application's file access controls.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with unauthorized access to potentially sensitive information stored within the application's file system. The ability to read arbitrary .txt files means that attackers could potentially access administrative account credentials, system configuration details, or other sensitive data that might be stored in text-based files. This vulnerability essentially undermines the fundamental security boundaries of the web application, allowing attackers to bypass normal access controls and potentially escalate their privileges within the system. The remote nature of the attack means that exploitation can occur without requiring physical access to the server or direct network access to the application's file system.
Security professionals should consider implementing multiple layers of mitigation strategies to address this vulnerability. Input validation and sanitization should be strengthened to reject or properly encode any directory traversal sequences in user-supplied parameters. The application should enforce strict file access controls that prevent access to sensitive files regardless of user input. Additionally, implementing proper access controls and privilege separation within the web application can help limit the damage that could result from such vulnerabilities. The ATT&CK framework categorizes this type of vulnerability under privilege escalation and credential access techniques, specifically mapping to the use of directory traversal for information gathering and credential theft. Organizations should also consider implementing web application firewalls and security monitoring solutions to detect and prevent exploitation attempts of this nature, while maintaining regular security assessments to identify similar vulnerabilities in other applications and systems.