CVE-2002-0492 in DCshop
Summary
by MITRE
dcshop.cgi in DCShop 1.002 Beta allows remote attackers to delete arbitrary setup files via a null character in the database parameter.
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Analysis
by VulDB Data Team • 08/04/2024
The vulnerability described in CVE-2002-0492 affects DCShop 1.002 Beta, a web-based e-commerce solution that allows users to manage online stores. This particular flaw resides in the dcshop.cgi script which processes database parameters through user input. The issue manifests when an attacker can manipulate the database parameter to include a null character, enabling arbitrary file deletion on the target system. This represents a critical security weakness that could allow remote attackers to compromise the integrity and availability of the web application's underlying file system.
The technical implementation of this vulnerability stems from improper input validation and sanitization within the dcshop.cgi script. When processing the database parameter, the application fails to properly sanitize user-supplied input, allowing null characters to be passed directly to file system operations. This lack of input filtering creates a path traversal condition where an attacker can manipulate the file deletion process to target any file within the application's directory structure. The null character injection technique exploits the way the application handles string termination, bypassing normal security checks that would otherwise prevent deletion of critical system files. This flaw aligns with CWE-77 and CWE-22 categories, specifically addressing improper input validation and path traversal vulnerabilities that enable unauthorized file operations.
The operational impact of this vulnerability is severe and multifaceted for affected systems. Remote attackers can leverage this weakness to delete critical application files, configuration data, or even system files that could render the web application completely inoperable. The ability to delete arbitrary setup files compromises the integrity of the entire e-commerce platform, potentially leading to complete service disruption. Additionally, this vulnerability could enable attackers to remove security-related files or logs, making the compromise harder to detect and investigate. The attack surface extends beyond simple file deletion to include potential privilege escalation and persistent access mechanisms that attackers might establish through file manipulation. Organizations using DCShop 1.002 Beta face significant risk of data loss, service interruption, and potential complete system compromise.
Mitigation strategies for CVE-2002-0492 require immediate implementation of input validation and sanitization measures within the affected application. System administrators should ensure that all user-supplied input undergoes strict validation before processing, particularly for parameters that interact with the file system. The null character should be explicitly rejected or escaped during input handling to prevent its propagation to file system operations. Organizations should also implement proper access controls and file permissions to limit the damage that could result from successful exploitation. Regular security updates and patches should be applied to address known vulnerabilities, with the specific fix for this issue requiring code modifications to sanitize database parameters properly. Additionally, network segmentation and monitoring solutions should be deployed to detect and prevent unauthorized access attempts targeting this specific vulnerability. The remediation efforts should align with ATT&CK technique T1059.007 for command and scripting interpreter usage, as attackers may attempt to exploit this vulnerability through automated scripts or command execution mechanisms.