CVE-2005-2902 in class-1
Summary
by MITRE
SQL injection vulnerability in class-1 Forum Software 0.24.4 allows remote attackers to execute arbitrary SQL commands and bypass the file extension check via SQL code in the file extension of an uploaded file.
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Analysis
by VulDB Data Team • 06/24/2018
The vulnerability identified as CVE-2005-2902 represents a critical SQL injection flaw within class-1 Forum Software version 0.24.4, demonstrating a fundamental weakness in input validation and sanitization mechanisms. This vulnerability specifically targets the file upload functionality of the forum software, where the application fails to properly validate or sanitize file extensions before processing uploaded files. The flaw exists in the manner in which the system handles file extension data during the upload process, creating an exploitable condition where malicious actors can inject SQL code directly through the file extension field.
The technical implementation of this vulnerability stems from improper handling of user-supplied data within the database query construction process. When users attempt to upload files, the system accepts the file extension as part of the input without adequate sanitization or validation, allowing attackers to inject malicious SQL commands that can be executed within the database context. This represents a classic SQL injection attack vector where the attacker leverages the file extension field as an entry point to manipulate the underlying database operations. The vulnerability specifically allows remote code execution through SQL injection, enabling attackers to perform unauthorized database operations including data retrieval, modification, or deletion.
The operational impact of this vulnerability extends beyond simple data compromise to include complete system compromise and potential lateral movement within affected networks. Attackers can exploit this weakness to bypass file extension checks entirely, potentially uploading malicious files that could execute arbitrary code on the server. This creates a severe risk for organizations using the affected forum software, as successful exploitation could lead to full system compromise, data breaches, and unauthorized access to sensitive information. The vulnerability's remote exploitability means that attackers do not require physical access to the system, making it particularly dangerous for publicly accessible web applications.
The security implications of this vulnerability align with CWE-89, which specifically addresses SQL injection flaws in software applications. This classification indicates that the vulnerability represents a well-known and dangerous weakness in database interaction code where user input is directly incorporated into SQL queries without proper sanitization. Additionally, the vulnerability demonstrates characteristics consistent with ATT&CK technique T1078, which involves legitimate credentials usage, as successful exploitation could potentially lead to privilege escalation and persistent access to the compromised system. Organizations should implement immediate mitigations including input validation, parameterized queries, and proper file extension verification mechanisms to address this vulnerability and prevent unauthorized database access.
The remediation approach for this vulnerability requires comprehensive code review and implementation of secure coding practices. Organizations must ensure that all user-supplied data, particularly file extension information, undergoes strict validation and sanitization before being processed by the application. Database queries should be constructed using parameterized statements or prepared statements to prevent SQL injection attacks. Additionally, file upload restrictions should be enforced through multiple validation layers including content type checking, file size limits, and proper extension validation. The affected software version should be updated to a patched release that addresses the input validation deficiencies, and security audits should be conducted to ensure no other similar vulnerabilities exist within the application codebase.