CVE-2019-7434 in Rental Bike Script
Summary
by MITRE
PHP Scripts Mall Rental Bike Script 2.0.3 has directory traversal via a direct request for a listing of an uploads directory.
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Analysis
by VulDB Data Team • 08/04/2023
The vulnerability identified as CVE-2019-7434 affects the PHP Scripts Mall Rental Bike Script version 2.0.3, presenting a critical directory traversal flaw that allows unauthorized access to sensitive system files. This vulnerability stems from inadequate input validation within the application's file handling mechanisms, specifically when processing direct requests for listing uploads directories. The flaw enables attackers to navigate through the file system hierarchy and potentially access restricted files that should not be publicly accessible.
The technical implementation of this vulnerability occurs through improper sanitization of user-supplied input parameters that are used to construct file paths. When a user makes a direct request to list uploads directories, the application fails to properly validate or sanitize the input, allowing malicious actors to manipulate the request parameters to traverse directories beyond the intended scope. This type of vulnerability falls under the CWE-22 category known as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", which is classified as a serious security weakness that can lead to unauthorized data access and system compromise.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable attackers to access sensitive configuration files, database credentials, application source code, and potentially system files that contain authentication tokens or other critical security data. An attacker could leverage this vulnerability to gain insights into the application's architecture, identify additional vulnerabilities, or even escalate privileges within the system. The vulnerability also poses significant risks to data integrity and confidentiality, as it allows unauthorized access to potentially sensitive information stored within the application's directory structure.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and sanitization measures within the application's file handling routines. The recommended approach includes implementing proper path validation that prevents traversal sequences such as "../" or "..\" from being processed, utilizing whitelisting mechanisms for allowed file paths, and employing secure file access controls that restrict directory listing operations. Additionally, the application should implement proper authentication and authorization checks before allowing any file system access operations. Organizations should also consider implementing web application firewalls that can detect and block suspicious traversal attempts, and conduct regular security audits to identify similar vulnerabilities within their codebase. This vulnerability aligns with ATT&CK technique T1083 which describes the discovery of files and directories, and T1566 which covers credential access through various methods including file system traversal attacks that can lead to privilege escalation and system compromise.