CVE-2001-0780 in Directory Pro
Summary
by MITRE
Directory traversal vulnerability in cosmicpro.cgi in Cosmicperl Directory Pro 2.0 allows remote attacker to gain sensitive information via a .. (dot dot) in the SHOW parameter.
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Analysis
by VulDB Data Team • 10/04/2025
The vulnerability described in CVE-2001-0780 represents a classic directory traversal flaw affecting the Cosmicperl Directory Pro 2.0 web application. This issue manifests in the cosmicpro.cgi script where the application fails to properly validate user input submitted through the SHOW parameter. The vulnerability stems from inadequate input sanitization mechanisms that allow attackers to manipulate file path references using the .. (dot dot) sequence, which is a standard technique for navigating up directory levels in file systems. The flaw resides in the application's handling of file access requests, where user-supplied parameters are directly incorporated into file system operations without proper validation or sanitization.
This directory traversal vulnerability falls under the CWE-22 category, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. The attack vector enables remote adversaries to access files outside the intended directory structure, potentially exposing sensitive system information including configuration files, user data, and system credentials. The vulnerability is particularly dangerous because it operates at the file system level, allowing attackers to bypass normal access controls and retrieve files that should remain protected. The SHOW parameter in cosmicpro.cgi serves as the entry point for this exploitation, where the application constructs file paths based on user input without implementing proper path validation or canonicalization.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to access critical system resources that could lead to further compromise. An attacker could potentially retrieve system configuration files, database files, or other sensitive data that might contain authentication credentials, system settings, or other valuable information. The remote nature of the attack means that exploitation does not require local system access or prior authentication, making it particularly attractive to threat actors seeking to gather intelligence about target systems. The vulnerability also aligns with several tactics in the MITRE ATT&CK framework, specifically including credential access and discovery phases where adversaries seek to understand system configurations and extract sensitive information. The lack of input validation creates a persistent risk that remains exploitable until the underlying code is properly patched or the application is updated to implement proper input sanitization.
Mitigation strategies for this vulnerability must focus on implementing robust input validation and sanitization mechanisms within the cosmicpro.cgi script. The most effective approach involves ensuring that all user-supplied input parameters are properly validated against a whitelist of allowed values or that the application performs proper path canonicalization to prevent directory traversal attempts. Organizations should implement proper access controls and file system permissions to limit what files can be accessed even if traversal attempts are successful. The implementation of secure coding practices including parameterized queries, input filtering, and proper error handling can significantly reduce the risk of exploitation. Additionally, regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other applications, as directory traversal flaws often occur in legacy web applications that have not been updated to modern security standards. The vulnerability also underscores the importance of keeping web applications updated and following security best practices for file system access controls and input validation.