CVE-2000-1048 in Wingate
Summary
by MITRE
Directory traversal vulnerability in the logfile service of Wingate 4.1 Beta A and earlier allows remote attackers to read arbitrary files via a .. (dot dot) attack via an HTTP GET request that uses encoded characters in the URL.
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Analysis
by VulDB Data Team • 05/27/2019
The vulnerability described in CVE-2000-1048 represents a critical directory traversal flaw within the logfile service of Wingate 4.1 Beta A and earlier versions. This security weakness resides in the web server component of the Wingate proxy software, which is commonly used for network access control and firewall management. The vulnerability specifically affects the handling of HTTP GET requests within the logging service, creating an exploitable condition that allows unauthorized access to system files beyond the intended scope. The flaw manifests when the application fails to properly validate and sanitize input parameters that contain directory traversal sequences, enabling attackers to manipulate file paths through crafted requests.
The technical implementation of this vulnerability exploits the fundamental weakness in input validation mechanisms within the Wingate logfile service. Attackers can construct malicious HTTP GET requests that include encoded dot-dot sequences such as ..%2F or similar URL encoding patterns to navigate upward in the directory structure. When the service processes these requests without adequate sanitization, it fails to prevent traversal beyond the intended log file directories, thereby allowing access to arbitrary files on the underlying filesystem. This type of vulnerability is classified under CWE-22 as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')" and represents a classic example of insufficient input validation in web applications. The vulnerability is particularly dangerous because it can be exploited remotely without requiring authentication, making it a significant threat vector for attackers seeking unauthorized system access.
The operational impact of CVE-2000-1048 extends beyond simple information disclosure, as it can potentially lead to complete system compromise. An attacker who successfully exploits this vulnerability can access sensitive system files including configuration data, user credentials, system logs, and potentially even system binaries. The implications are particularly severe in environments where Wingate serves as a primary network gateway or firewall, as the compromised system could provide attackers with access to internal network resources that would otherwise be protected by the proxy infrastructure. This vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachments) when considering how attackers might leverage such access for further exploitation. The remote nature of the attack means that defenders have limited ability to detect or prevent the exploitation through network monitoring alone, as the malicious requests can originate from any location on the internet.
Mitigation strategies for CVE-2000-1048 require immediate action to address the root cause through proper input validation and access control mechanisms. The primary remediation involves updating to a patched version of Wingate that properly implements path validation and sanitization for all file access operations. Organizations should implement strict input filtering that rejects or encodes special characters including dots, forward slashes, and backslashes in file path parameters. Network administrators should also consider implementing web application firewalls that can detect and block suspicious path traversal patterns in HTTP requests. Additionally, the principle of least privilege should be enforced by ensuring that the logfile service operates with minimal required permissions and that log files are stored in restricted directories with appropriate access controls. Security monitoring should include detection of unusual file access patterns and anomalous HTTP requests that attempt directory traversal operations. This vulnerability serves as a reminder of the critical importance of input validation in web applications and demonstrates how seemingly simple flaws can create significant security risks in network infrastructure software.