CVE-2002-0312 in Essentia Web Server
Summary
by MITRE
Directory traversal vulnerability in Essentia Web Server 2.1 allows remote attackers to read arbitrary files via a .. (dot dot) in a URL.
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Analysis
by VulDB Data Team • 05/18/2019
The directory traversal vulnerability identified as CVE-2002-0312 represents a critical security flaw in the Essentia Web Server version 2.1 that enables remote attackers to access arbitrary files on the target system through manipulated url paths containing dot dot sequences. This vulnerability falls under the common weakness enumeration CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw occurs when the web server fails to properly validate or sanitize user input that contains directory navigation sequences, allowing malicious actors to bypass normal access controls and retrieve files from locations outside the intended web root directory.
The technical implementation of this vulnerability exploits the fundamental way web servers process file paths and directory navigation sequences. When a user submits a URL containing .. (dot dot) sequences, the web server processes these navigation commands without adequate validation, permitting access to parent directories and potentially sensitive system files. This allows attackers to navigate upward through the directory structure and access files that should normally be restricted to authorized users only. The vulnerability is particularly dangerous because it can be exploited without requiring authentication or special privileges, making it an attractive target for attackers seeking to gather sensitive information from the affected system.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can provide attackers with access to system configuration files, database files, application source code, and potentially user credentials stored in accessible locations. An attacker could leverage this vulnerability to gain insights into the system architecture, identify other potential attack vectors, or extract sensitive data that could be used for further exploitation. The ease of exploitation makes this vulnerability particularly dangerous in environments where the web server is not properly secured or where access controls are insufficient. The vulnerability affects the web server's core functionality and can lead to complete system compromise if sensitive files containing passwords, database connection strings, or other critical information are accessible through the traversal mechanism.
Mitigation strategies for CVE-2002-0312 should focus on implementing proper input validation and sanitization measures within the web server configuration. Organizations should ensure that all user-supplied input containing directory navigation sequences is properly filtered or rejected before processing. The implementation of a robust security model that restricts file access to predefined directories and implements proper path normalization techniques can prevent attackers from exploiting these vulnerabilities. Additionally, system administrators should consider implementing web application firewalls or security modules that can detect and block suspicious path traversal attempts. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other web applications and systems, as path traversal remains a persistent threat vector in web security. The vulnerability also underscores the importance of keeping web server software updated with the latest security patches and following security best practices for web application development and deployment.