CVE-2022-29751 in Simple Client Management System
Summary
by MITRE • 05/12/2022
Simple Client Management System 1.0 is vulnerable to SQL Injection via /cms/classes/Master.php?f=delete_client.
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Analysis
by VulDB Data Team • 05/15/2022
The Simple Client Management System version 1.0 contains a critical sql injection vulnerability that can be exploited through the /cms/classes/Master.php?f=delete_client endpoint. This vulnerability arises from insufficient input validation and improper parameter handling when processing client deletion requests. The flaw allows authenticated attackers with privileges to delete clients to inject malicious sql code that can manipulate the underlying database structure and potentially extract sensitive information. The vulnerability is classified under cwe-89 which specifically addresses sql injection flaws where untrusted data is incorporated into sql queries without proper sanitization or parameterization. This weakness enables attackers to bypass authentication mechanisms, modify or delete arbitrary records, and potentially gain unauthorized access to confidential client data stored within the system.
The operational impact of this vulnerability extends beyond simple data manipulation as it can lead to complete database compromise when combined with other exploitation techniques. Attackers can leverage this vulnerability to perform union-based sql injection attacks that allow them to extract user credentials, personal information, and business data from the database. The vulnerability exists because the application directly incorporates user-supplied parameters into sql queries without proper sanitization or prepared statement usage. This type of attack vector aligns with the attack technique described in the mitre att&ck framework under technique t1071.004 for application layer protocol tunneling and t1213.002 for data from information repositories. The attack can be executed by sending malicious payloads through the delete_client function parameter, which then gets processed by the backend sql engine without adequate input validation.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and parameterized queries throughout the application. The most effective solution involves replacing direct sql query concatenation with prepared statements or stored procedures that separate sql code from data. Additionally, implementing proper access controls and input sanitization mechanisms can significantly reduce the attack surface. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious sql injection patterns. The vulnerability demonstrates the critical importance of following secure coding practices as outlined in owasp top ten 2021 category a03 which addresses injection flaws. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other components of the system. System administrators should also implement proper logging and monitoring to detect unauthorized access attempts and sql injection activities. The fix requires updating the application code to properly escape or parameterize all user inputs before they are processed by the sql engine, ensuring that no malicious code can be executed within the database context.