CVE-2000-1036 in RBS ISP
Summary
by MITRE
Directory traversal vulnerability in Extent RBS ISP web server allows remote attackers to read sensitive information via a .. (dot dot) attack on the Image parameter.
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Analysis
by VulDB Data Team • 12/28/2024
The CVE-2000-1036 vulnerability represents a critical directory traversal flaw in the Extent RBS ISP web server implementation that fundamentally compromises file system access controls. This vulnerability stems from inadequate input validation within the web server's handling of the Image parameter, allowing malicious actors to exploit the system's file access mechanisms through carefully crafted dot-dot-slash sequences. The flaw exists at the application layer where user-supplied parameters are directly processed without proper sanitization or path validation, creating an avenue for unauthorized file system navigation beyond the intended web root directory.
The technical exploitation of this vulnerability follows the classic directory traversal pattern where attackers append sequences such as ../../../etc/passwd or similar path manipulation attempts to the Image parameter. When the web server processes these inputs, it fails to properly validate or sanitize the directory path, allowing the system to interpret the dot-dot sequences as legitimate navigation commands rather than malicious input. This results in the web server accessing files outside of its designated document root, potentially exposing sensitive system files including configuration data, user credentials, and system binaries that should remain protected from external access.
From an operational perspective, the impact of CVE-2000-1036 extends beyond simple information disclosure to potentially enable further attack vectors within the compromised system. An attacker who successfully exploits this vulnerability gains access to system files that may contain database connection strings, application configuration details, or other sensitive data that could facilitate additional attacks. The vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, and represents a fundamental flaw in the web server's security model that violates basic principles of least privilege and secure input handling. This type of vulnerability also maps to attack techniques described in the MITRE ATT&CK framework under the T1083 discovery technique, as it enables adversaries to enumerate system resources and gather intelligence about the target environment.
The mitigation strategies for this vulnerability require immediate implementation of input validation controls and proper path sanitization within the web server's parameter handling logic. Organizations should implement strict parameter validation that rejects or normalizes any input containing directory traversal sequences, ensuring that all user-supplied parameters are properly sanitized before being processed. Additionally, the web server should be configured with proper file system permissions that limit access to sensitive directories and implement proper access controls that prevent unauthorized file system navigation. The vulnerability demonstrates the critical importance of secure coding practices and input validation, particularly in web applications where user input directly influences system operations. System administrators should also consider implementing web application firewalls and intrusion detection systems that can identify and block suspicious directory traversal attempts, while regular security audits should verify that similar vulnerabilities do not exist in other components of the web infrastructure. The remediation process must include thorough code review to identify all potential input parameters that could be exploited in similar fashion, ensuring comprehensive protection against this class of vulnerability that continues to plague web applications decades after its initial discovery.