CVE-2003-1351 in EditTag
Summary
by MITRE
Directory traversal vulnerability in edittag.cgi in EditTag 1.1 allows remote attackers to read arbitrary files via a "%2F.." (encoded slash dot dot) in the file parameter.
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Analysis
by VulDB Data Team • 06/16/2018
The vulnerability identified as CVE-2003-1351 represents a critical directory traversal flaw within the EditTag 1.1 web application's edittag.cgi component. This security weakness stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied parameters before processing file operations. The vulnerability specifically affects the file parameter handling within the cgi script, where attackers can exploit malformed input sequences to navigate outside the intended directory structure and access arbitrary files on the server filesystem.
The technical exploitation of this vulnerability relies on the manipulation of URL-encoded sequences where "%2F.." represents an encoded forward slash followed by dot-dot traversal components. When the edittag.cgi script processes such input without proper validation, it interprets the encoded sequence as a legitimate path traversal instruction rather than malicious input. This allows attackers to bypass normal file access controls and potentially retrieve sensitive information from system files, configuration data, or other restricted resources that should remain inaccessible to unauthorized users.
From an operational impact perspective, this vulnerability creates significant security risks for systems running the affected EditTag software. Remote attackers can leverage this flaw to access not only application-specific files but potentially system-critical resources including database credentials, configuration files containing sensitive data, or even system binaries that could facilitate further exploitation. The vulnerability's remote nature means that attackers do not require local system access or credentials to exploit the flaw, making it particularly dangerous in web-facing environments where the application is accessible over the network.
This vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. The flaw demonstrates poor input sanitization practices that violate fundamental security principles for web application development. From an attack framework perspective, this vulnerability would map to multiple ATT&CK techniques including T1083 (File and Directory Discovery) and potentially T1566 (Phishing) if attackers use the information gained to craft more sophisticated social engineering attacks. The vulnerability's persistence across multiple systems indicates that it represents a widespread implementation flaw in the application's architecture rather than an isolated incident.
Mitigation strategies for CVE-2003-1351 should prioritize immediate patching of the affected EditTag software to version 1.2 or later, which contains the necessary input validation fixes. Organizations should implement comprehensive input validation mechanisms that reject or properly encode any path traversal sequences before processing user input. Network-level protections such as web application firewalls can provide additional defense-in-depth measures by detecting and blocking suspicious URL patterns. System administrators should also conduct thorough file access reviews to identify and restrict unnecessary file access permissions, particularly for web application directories. Regular security assessments and code reviews focusing on input validation practices can help prevent similar vulnerabilities from being introduced in future development cycles. The remediation process should include monitoring for exploitation attempts and implementing proper logging of file access operations to detect potential unauthorized access attempts.