CVE-2006-2268 in FlexCustomer
Summary
by MITRE
SQL injection vulnerability in FlexCustomer 0.0.4 and earlier allows remote attackers to bypass authentication and execute arbitrary SQL commands via the admin and ordinary user interface, probably involving the (1) checkuser and (2) checkpass parameters to (a) admin/index.php, and (3) username and (4) password parameters to (b) index.php. NOTE: it was later reported that 0.0.6 is also affected.
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Analysis
by VulDB Data Team • 11/21/2024
This vulnerability represents a critical sql injection flaw in FlexCustomer version 0.0.4 and earlier, which fundamentally compromises the application's authentication mechanisms and data integrity. The vulnerability stems from improper input validation and sanitization within the application's user authentication pathways, specifically targeting the administrative and standard user interfaces. Attackers can exploit this weakness by manipulating the checkuser and checkpass parameters in the admin/index.php endpoint, as well as the username and password parameters in the index.php endpoint to bypass authentication controls and execute arbitrary sql commands against the underlying database system.
The technical exploitation of this vulnerability follows a classic sql injection attack pattern where user-supplied input is directly concatenated into sql query strings without proper sanitization or parameterization. When an attacker submits malicious input through the affected parameters, the application processes these inputs without adequate validation, allowing sql commands embedded within the input to be executed by the database engine. This creates a pathway for unauthorized access to administrative functions and potentially full database compromise. The vulnerability affects both administrative and regular user interfaces, amplifying its impact as attackers can exploit it from multiple entry points within the application.
The operational impact of this vulnerability is severe and multifaceted, as it enables attackers to completely bypass authentication mechanisms and gain unauthorized access to the application's administrative functions. Successful exploitation allows attackers to execute arbitrary sql commands, potentially leading to data theft, data modification, or complete database compromise. The vulnerability's presence in both admin/index.php and index.php endpoints means that attackers can target either interface to gain unauthorized access, making the attack surface larger and more difficult to secure. Additionally, the fact that version 0.0.6 was later reported as affected indicates that the vulnerability was not properly addressed in subsequent releases, leaving users exposed to continued risk.
Security mitigations for this vulnerability should focus on implementing proper input validation and sanitization techniques throughout the application's codebase, particularly in authentication pathways. The most effective remediation involves using parameterized queries or prepared statements to prevent sql injection attacks, ensuring that user input is never directly concatenated into sql commands. Input validation should be implemented at multiple layers including application-level filters, database-level restrictions, and proper error handling that does not reveal sensitive information about the database structure. Network-level protections such as web application firewalls can provide additional defense-in-depth measures, while regular security assessments and code reviews should be conducted to identify and address similar vulnerabilities. The vulnerability aligns with CWE-89 sql injection and maps to ATT&CK technique T1190 exploitation for execution, highlighting the need for comprehensive security controls including input validation, secure coding practices, and regular vulnerability assessments. Organizations should prioritize immediate patching or implementation of compensating controls, as the vulnerability's impact extends beyond simple authentication bypass to potential full system compromise through database access.