CVE-2002-0262 in E-Trainer
Summary
by MITRE
Directory traversal vulnerability in netget for Sybex E-Trainer web server allows remote attackers to read arbitrary files via a .. (dot dot) in the file parameter.
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Analysis
by VulDB Data Team • 05/18/2019
The vulnerability identified as CVE-2002-0262 represents a classic directory traversal flaw within the netget component of the Sybex E-Trainer web server implementation. This security weakness stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied file parameters before processing file system requests. The vulnerability specifically manifests when the application processes file requests containing .. (dot dot) sequences in the file parameter, allowing attackers to navigate beyond the intended directory boundaries and access arbitrary files on the underlying file system.
This directory traversal vulnerability maps to 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 exists at the application layer where user input directly influences file system operations without proper sanitization or validation. Attackers can exploit this weakness by crafting malicious requests that include directory traversal sequences such as ../../etc/passwd or ../../../windows/system32/drivers/etc/hosts, enabling them to read sensitive system files that should remain inaccessible to unauthorized users.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to access critical system files, configuration data, and potentially sensitive user information stored on the web server. This could lead to complete system compromise, especially when combined with other vulnerabilities or when attackers gain access to administrative files, database credentials, or application configuration details. The vulnerability affects the confidentiality and integrity of the web server environment, potentially exposing sensitive data that could be used for further attacks or system exploitation.
From an ATT&CK framework perspective, this vulnerability aligns with techniques such as T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachments) where attackers might leverage directory traversal to discover and extract sensitive files. The attack vector operates through the network layer where remote attackers can submit malicious requests through the web interface without requiring local system access or authentication. Mitigation strategies should include implementing proper input validation, using secure file access methods, and restricting file system access to only necessary directories. Organizations should also consider implementing web application firewalls and regular security assessments to identify and remediate similar path traversal vulnerabilities across their web applications and services.