CVE-2022-36731 in Library Management System
Summary
by MITRE • 08/31/2022
Library Management System v1.0 was discovered to contain a SQL injection vulnerability via the RollNo parameter at /librarian/delstu.php.
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Analysis
by VulDB Data Team • 10/10/2022
The vulnerability identified as CVE-2022-36731 represents a critical SQL injection flaw within the Library Management System version 1.0, specifically affecting the librarian module's student deletion functionality. This issue manifests through the RollNo parameter in the delstu.php endpoint, which processes requests to remove student records from the library management database. The flaw allows unauthorized attackers to manipulate the underlying database queries by injecting malicious SQL code through the RollNo input field, potentially compromising the entire database infrastructure and sensitive student information.
The technical exploitation of this vulnerability stems from inadequate input validation and parameter sanitization within the application's backend processing logic. When the system receives a RollNo parameter, it directly incorporates this user-supplied data into SQL query construction without proper escaping or parameterization mechanisms. This design flaw aligns with CWE-89, which categorizes SQL injection vulnerabilities as weaknesses in software that allows attackers to execute arbitrary SQL commands against the database. The vulnerability exists at the application layer where user inputs are not properly sanitized before being processed by the database engine, creating a direct pathway for malicious data manipulation.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with the capability to perform unauthorized database operations including data modification, deletion, and potential privilege escalation. An attacker could exploit this flaw to delete student records, modify library borrowing histories, or even gain access to administrative accounts if the database permissions are not properly restricted. The vulnerability affects the confidentiality, integrity, and availability of the library management system, potentially disrupting library operations and exposing sensitive personal information of students. According to ATT&CK framework, this vulnerability maps to T1190 - Exploit Public-Facing Application, where adversaries leverage application weaknesses to gain unauthorized access to backend systems.
Mitigation strategies for this vulnerability should prioritize immediate implementation of parameterized queries and input validation mechanisms throughout the application's codebase. The development team must ensure that all user inputs, particularly those used in database operations, are properly sanitized and validated before processing. Implementing proper prepared statements or parameterized queries will prevent the injection of malicious SQL code. Additionally, access controls should be strengthened to limit database privileges for application users, ensuring that even if exploitation occurs, the attacker's capabilities remain constrained. Regular security assessments, including automated scanning and manual penetration testing, should be conducted to identify and remediate similar vulnerabilities across the entire application stack. The system should also implement proper error handling that does not expose database structure information to end users, as this information can aid attackers in further exploitation attempts.