CVE-2001-0199 in SEDUM HTTP Server
Summary
by MITRE
Directory traversal vulnerability in SEDUM HTTP Server 2.0 allows remote attackers to read arbitrary files via a .. (dot dot) attack in the HTTP GET request.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 03/11/2025
The CVE-2001-0199 vulnerability represents a classic directory traversal flaw in the SEDUM HTTP Server version 2.0, exposing a fundamental security weakness in how the server processes file requests. This vulnerability enables remote attackers to access files outside the intended web root directory through carefully crafted HTTP GET requests containing directory traversal sequences. The flaw stems from inadequate input validation and path normalization within the server's file access mechanisms, allowing malicious users to navigate beyond the designated document root through the use of dot-dot sequences in their requests.
This directory traversal vulnerability operates by exploiting the server's failure to properly sanitize or validate file paths received in HTTP GET requests. When an attacker submits a request containing sequences like "../" or "..\\", the server processes these paths without proper validation, allowing the attacker to traverse the file system hierarchy and access files that should remain protected. The vulnerability specifically affects the SEDUM HTTP Server 2.0 implementation where the server fails to canonicalize or validate the requested file paths, creating an opportunity for unauthorized file access. The impact extends beyond simple file reading to potentially expose sensitive system files, configuration data, and user information stored on the server.
The operational impact of CVE-2001-0199 is significant as it provides attackers with the capability to read arbitrary files from the server's file system without authentication. This can lead to exposure of sensitive information including system configuration files, user credentials, application source code, and other confidential data. The vulnerability is particularly dangerous because it allows remote exploitation without requiring any prior authentication or privileged access to the system. Attackers can leverage this weakness to gather intelligence about the target system, potentially leading to further exploitation or lateral movement within the network infrastructure. The vulnerability aligns with CWE-22, which categorizes improper limitation of a pathname to a restricted directory, and represents a fundamental flaw in input validation and access control mechanisms.
Security mitigations for this vulnerability require immediate implementation of proper input validation and path normalization techniques within the HTTP server configuration. System administrators should ensure that the server properly canonicalizes all file paths and rejects requests containing directory traversal sequences. The recommended approach includes implementing strict path validation that prevents access to parent directories and ensuring that all file access operations occur within the designated document root. Organizations should also consider implementing web application firewalls and intrusion prevention systems that can detect and block suspicious directory traversal attempts. The vulnerability demonstrates the critical importance of input validation and proper access controls as outlined in the mitre attack framework under the technique of privilege escalation through path traversal. Regular security audits and code reviews should be conducted to identify and remediate similar weaknesses in other web applications and server implementations.
The remediation process for CVE-2001-0199 requires immediate patching of the SEDUM HTTP Server or replacement with a more secure web server implementation. Organizations should also implement network segmentation and access controls to limit the potential impact of such vulnerabilities. The vulnerability serves as a historical example of why modern security practices emphasize the principle of least privilege and proper input validation in all web applications. Security teams should monitor for similar vulnerabilities in other legacy systems and ensure that all file access operations properly validate and sanitize user inputs to prevent unauthorized system access. This vulnerability highlights the critical need for comprehensive security testing including penetration testing and vulnerability scanning to identify and remediate directory traversal flaws before they can be exploited by malicious actors.