CVE-2009-3327 in WX-Guestbook
Summary
by MITRE
Multiple SQL injection vulnerabilities in WX-Guestbook 1.1.208 allow remote attackers to execute arbitrary SQL commands via the (1) QUERY parameter to search.php and (2) USERNAME parameter to login.php. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 12/15/2024
The vulnerability identified as CVE-2009-3327 represents a critical SQL injection flaw affecting WX-Guestbook version 1.1.208, demonstrating a fundamental weakness in input validation and query construction within web applications. This vulnerability resides in the application's handling of user-supplied data in two distinct entry points, creating multiple attack vectors that can be exploited by remote adversaries without requiring authentication. The flaw specifically manifests in the QUERY parameter of search.php and the USERNAME parameter of login.php, both of which fail to properly sanitize or escape user input before incorporating it into database queries. This oversight allows attackers to inject malicious SQL code that executes with the privileges of the database user account, potentially leading to complete system compromise and unauthorized data access.
The technical implementation of this vulnerability aligns with CWE-89, which categorizes SQL injection as a condition where an application fails to properly escape or validate user input before using it in SQL commands. The attack surface is particularly concerning because it affects core application functions that are frequently accessed by users. When an attacker submits malicious input through the QUERY parameter in search.php, the application constructs a SQL query that directly incorporates the user-supplied data without proper sanitization, allowing the attacker to manipulate the query structure and potentially extract, modify, or delete database contents. Similarly, the USERNAME parameter in login.php presents an identical risk, as the application likely uses this input to construct authentication queries that can be manipulated to bypass normal login procedures or gain unauthorized access to user accounts.
The operational impact of this vulnerability extends far beyond simple data theft, as it can enable attackers to escalate privileges and achieve complete system compromise. An attacker exploiting this vulnerability could potentially access sensitive user information, including personal details and authentication credentials, while also gaining the ability to modify or delete database records. The implications are particularly severe given that the vulnerability affects both search and login functionality, which are core components of any web application. According to ATT&CK framework reference T1190, this vulnerability represents a technique for exploiting software flaws to gain unauthorized access to systems, while also aligning with T1071.004 which covers application layer protocol manipulation. The vulnerability's remote nature means that attackers can exploit it from anywhere on the internet without requiring physical access to the system, making it particularly dangerous for web applications that are publicly accessible.
Mitigation strategies for this vulnerability must address both the immediate code-level fixes and broader architectural security considerations. The primary remediation involves implementing proper input validation and parameterized queries throughout the application codebase, ensuring that all user-supplied data is properly escaped or parameterized before being incorporated into database operations. This approach directly addresses the root cause by preventing malicious SQL code from being executed as part of legitimate database queries. Additionally, implementing proper output encoding and using stored procedures with parameterized inputs can significantly reduce the attack surface. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious query patterns that may indicate exploitation attempts. The vulnerability serves as a stark reminder of the importance of following secure coding practices and conducting regular security assessments to identify and remediate similar flaws in web applications. Regular updates and patch management processes should be implemented to ensure that such vulnerabilities are addressed promptly when they are discovered, as the timeframe between vulnerability disclosure and exploitation often determines the severity of potential impacts.