CVE-2000-0180 in Sojourn
Summary
by MITRE
Sojourn search engine allows remote attackers to read arbitrary files via a .. (dot dot) attack.
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Analysis
by VulDB Data Team • 10/19/2025
The vulnerability identified as CVE-2000-0180 resides within the Sojourn search engine software, representing a classic directory traversal attack vector that enables remote adversaries to access arbitrary files on the affected system. This weakness stems from inadequate input validation mechanisms within the search engine's file handling processes, allowing malicious actors to manipulate file path parameters through directory traversal sequences. The specific exploitation technique leverages the double dot or .. (dot dot) notation commonly used in Unix-like and Windows file systems to navigate up directory levels, thereby bypassing intended access controls and gaining unauthorized access to sensitive system resources.
The technical flaw manifests when the Sojourn search engine fails to properly sanitize user-supplied input parameters that are subsequently used to construct file paths for retrieval operations. Attackers can craft malicious requests containing sequences such as ../../../etc/passwd or similar traversal patterns that cause the application to resolve file paths beyond the intended directory boundaries. This vulnerability directly maps to CWE-22, known as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", which is classified as a critical weakness in software security design. The vulnerability operates at the application layer, typically affecting web-based interfaces where user input is processed without adequate validation or sanitization, making it particularly dangerous in environments where the search engine has access to system files or sensitive data repositories.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it can potentially expose critical system information including configuration files, authentication credentials, database contents, and other sensitive data that may be stored within the affected system's file structure. Remote attackers can exploit this weakness from any network location without requiring local system access or prior authentication, making it particularly attractive for automated scanning and exploitation campaigns. The vulnerability's severity is amplified by its ability to potentially escalate to privilege escalation or system compromise, especially if the search engine process operates with elevated privileges or has access to sensitive directories containing system configuration files, user credentials, or application data. According to ATT&CK framework category T1083, this vulnerability enables adversaries to discover system information and file systems, which serves as a foundational step for more sophisticated attacks.
Mitigation strategies for CVE-2000-0180 should focus on implementing robust input validation and sanitization mechanisms within the Sojourn search engine software. Organizations should ensure that all user-supplied input parameters are rigorously validated to prevent directory traversal sequences from being processed as legitimate file path components. The implementation of a whitelist-based approach for acceptable file path patterns, combined with proper path normalization and absolute path resolution, can effectively prevent attackers from manipulating file access operations. Additionally, the search engine should be configured to operate with minimal required privileges and should be restricted to access only designated directories through proper access control lists and file system permissions. Regular security updates and patches should be applied to ensure the search engine software remains protected against known vulnerabilities, while network segmentation and firewall rules can help limit the attack surface and prevent unauthorized access to the vulnerable system components.