CVE-2017-20128 in KB Messages PHP Script
Summary
by MITRE • 07/13/2022
A vulnerability has been found in KB Messages PHP Script 1.0 and classified as critical. Affected by this vulnerability is an unknown functionality. The manipulation of the argument username/password with the input 'or''=' leads to sql injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 11/11/2022
This critical vulnerability exists in KB Messages PHP Script version 1.0 and represents a classic sql injection flaw that can be exploited remotely. The vulnerability stems from improper input validation within the authentication mechanism where the username and password parameters are not adequately sanitized before being processed by the database. The specific attack vector involves crafting malicious input strings containing the SQL operator 'or' followed by single quotes, which allows attackers to manipulate the underlying database queries and bypass authentication mechanisms. This type of vulnerability falls under CWE-89 which specifically addresses sql injection flaws in software applications. The remote exploitation capability makes this vulnerability particularly dangerous as attackers can target the system without requiring physical access or local network presence.
The technical implementation of this vulnerability demonstrates a fundamental flaw in the application's input handling procedures where user-supplied credentials are directly incorporated into sql query construction without proper parameterization or escaping mechanisms. When an attacker submits malicious input such as 'or''=', the sql injection payload can alter the intended query logic, potentially allowing unauthorized access to the system or enabling data extraction from the underlying database. This vulnerability directly impacts the authentication and authorization processes, potentially leading to complete system compromise. The attack surface is broad as it affects any user interaction with the login functionality, making it a prime target for automated exploitation tools that scan for common sql injection patterns.
The operational impact of this vulnerability extends beyond simple unauthorized access to include potential data breaches, system compromise, and service disruption. Successful exploitation could enable attackers to extract sensitive user information, modify database records, or even escalate privileges within the application. From an enterprise security perspective, this vulnerability represents a significant risk to organizational data integrity and confidentiality. The disclosure of the exploit to the public community means that threat actors can readily leverage this vulnerability without requiring advanced technical skills, increasing the likelihood of widespread compromise. The vulnerability's classification as critical indicates that immediate remediation is necessary to prevent potential exploitation and maintain system integrity.
Mitigation strategies should focus on implementing proper input validation and parameterized queries to prevent sql injection attacks. The recommended approach involves using prepared statements with parameter binding instead of direct string concatenation in sql queries. Additionally, implementing proper authentication mechanisms with account lockout policies and input sanitization can significantly reduce the risk of exploitation. Organizations should also consider implementing web application firewalls and regular security assessments to detect and prevent similar vulnerabilities. The remediation process should include code review to identify all input handling points and ensure proper sql injection protection measures are in place throughout the application. This vulnerability highlights the importance of following secure coding practices and adhering to industry standards such as those outlined in the OWASP top ten project, specifically addressing the sql injection category that maps to ATT&CK technique T1190.