CVE-2021-40907 in Storage Unit Rental Management System
Summary
by MITRE • 01/24/2022
SQL injection vulnerability in Sourcecodester Storage Unit Rental Management System v1 by oretnom23, allows attackers to execute arbitrary SQL commands via the username parameter to /storage/classes/Login.php.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 01/28/2022
The SQL injection vulnerability identified as CVE-2021-40907 affects the Storage Unit Rental Management System version 1 developed by oretnom23. This critical security flaw exists within the authentication mechanism of the application where user input is not properly sanitized before being incorporated into SQL queries. The vulnerability specifically manifests through the username parameter in the /storage/classes/Login.php endpoint, making it a direct attack vector for malicious actors seeking unauthorized access to the system's database infrastructure.
This vulnerability represents a classic SQL injection attack pattern that falls under CWE-89, which categorizes improper neutralization of special elements used in SQL commands. The flaw occurs when the application directly concatenates user-supplied input into SQL query strings without appropriate input validation or parameterization techniques. When an attacker submits malicious SQL payloads through the username field, the application processes these inputs without proper sanitization, allowing the injected commands to execute within the database context with the privileges of the database user account.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with the capability to manipulate, retrieve, modify, or delete sensitive information stored within the system. Given that this is a login authentication module, successful exploitation could lead to complete system compromise, allowing unauthorized users to gain administrative privileges or access to all stored customer data, rental records, payment information, and other confidential business data. The vulnerability also potentially enables attackers to perform privilege escalation attacks or establish persistent access through database-level modifications.
Security professionals should implement multiple layers of defense to mitigate this vulnerability. The primary remediation involves implementing proper input validation and parameterized queries throughout the application code, specifically addressing the username parameter handling in the Login.php file. Additionally, organizations should deploy web application firewalls to detect and block suspicious SQL injection patterns, implement least privilege database access controls, and conduct regular security assessments including automated vulnerability scanning and manual penetration testing. This vulnerability aligns with ATT&CK technique T1190 which covers exploitation of remote services, and T1071.004 which covers application layer protocol usage for command and control communications. Organizations should also consider implementing database activity monitoring solutions to detect anomalous SQL query patterns that may indicate exploitation attempts.