CVE-2021-43510 in Simple Client Management System
Summary
by MITRE • 02/01/2022
SQL Injection vulnerability exists in Sourcecodester Simple Client Management System 1.0 via the username field in login.php.
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Analysis
by VulDB Data Team • 02/04/2022
The CVE-2021-43510 vulnerability represents a critical sql injection flaw within the Sourcecodester Simple Client Management System version 1.0, specifically targeting the login.php component through the username field parameter. This vulnerability falls under the common weakness enumeration CWE-89 which categorizes sql injection as a severe security weakness that allows attackers to manipulate database queries through unvalidated input. The vulnerability stems from inadequate input sanitization and validation within the authentication mechanism, creating an exploitable pathway where malicious actors can inject arbitrary sql code into the system's database layer. The affected application fails to properly escape or parameterize user input before incorporating it into sql queries, thereby exposing the underlying database to unauthorized access and manipulation.
The operational impact of this vulnerability extends far beyond simple authentication bypass attempts, as it provides attackers with the potential to execute arbitrary commands on the database server. An attacker exploiting this vulnerability can perform data extraction, modification, or deletion operations on the client management system's database, potentially accessing sensitive customer information, user credentials, and business data. The vulnerability's exploitation does not require elevated privileges, making it particularly dangerous as it can be leveraged by anyone with access to the login interface. This weakness directly maps to the attack technique T1190 in the ATT&CK framework, which describes the exploitation of vulnerabilities in remote services to gain unauthorized access to systems and data.
The technical exploitation of this vulnerability typically involves crafting malicious input strings that manipulate the sql query structure within the login.php script. Attackers can inject sql payloads through the username field to either extract database schema information, bypass authentication entirely, or execute destructive operations on the database. The vulnerability's presence in a client management system creates additional risks as it may expose sensitive customer data including personal information, contact details, and potentially financial records. Organizations utilizing this system face significant regulatory and compliance risks, particularly if they handle personally identifiable information or protected data subject to standards such as gdpr, hipaa, or pci dss requirements. The vulnerability demonstrates poor secure coding practices and highlights the critical importance of implementing proper input validation, parameterized queries, and input sanitization techniques to prevent sql injection attacks.
Mitigation strategies for CVE-2021-43510 should include immediate patching of the affected system to the latest version that addresses the sql injection vulnerability. Organizations should implement proper parameterized queries or prepared statements to ensure user input cannot manipulate sql command structure. Input validation and sanitization measures must be strengthened to reject or escape potentially malicious characters before processing user input. Network segmentation and access controls should be implemented to limit exposure of the vulnerable application to unauthorized users. Regular security assessments and penetration testing should be conducted to identify and remediate similar vulnerabilities across the organization's application portfolio. Additionally, implementing web application firewalls and intrusion detection systems can provide additional layers of protection against sql injection attempts and other web-based attacks targeting the vulnerable login mechanism.