CVE-2009-2553 in Super Simple Blog Script
Summary
by MITRE
Multiple SQL injection vulnerabilities in comments.php in Super Simple Blog Script 2.5.4, when magic_quotes_gpc is disabled, allow remote attackers to execute arbitrary SQL commands via the entry parameter.
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Analysis
by VulDB Data Team • 12/05/2024
The vulnerability identified as CVE-2009-2553 represents a critical SQL injection flaw within the Super Simple Blog Script 2.5.4 web application. This vulnerability specifically affects the comments.php file and exploits a fundamental weakness in input validation mechanisms. The flaw occurs when the PHP configuration parameter magic_quotes_gpc is disabled, which removes the automatic escaping of special characters in GET, POST, and COOKIE data. This configuration setting, when turned off, leaves the application susceptible to malicious input manipulation that can bypass security controls designed to prevent unauthorized database access.
The technical exploitation of this vulnerability hinges on the improper handling of user-supplied data within the entry parameter of the comments.php script. When magic_quotes_gpc is disabled, the application fails to sanitize or escape input values before incorporating them into SQL query constructions. Attackers can craft malicious SQL payloads that, when injected through the entry parameter, get executed within the database context. This allows unauthorized individuals to perform various malicious activities including data extraction, modification, or deletion, depending on the database permissions assigned to the web application's database user account. The vulnerability falls under the Common Weakness Enumeration category CWE-89, which specifically addresses SQL injection weaknesses in software applications.
The operational impact of this vulnerability extends beyond simple data compromise, as it provides attackers with the capability to gain unauthorized access to the underlying database system. Successful exploitation can result in complete database takeover, enabling attackers to extract sensitive information, modify content, or even escalate privileges within the application environment. The vulnerability affects not only the blog's content but potentially exposes all user data, comments, and configuration settings stored within the database. Organizations running this version of the Super Simple Blog Script face significant risk of data breaches and system compromise when the magic_quotes_gpc setting is disabled, which is often the case in modern PHP configurations where this feature has been deprecated and removed.
Mitigation strategies for CVE-2009-2553 require immediate attention and multiple layers of defensive measures. The most effective immediate solution involves upgrading to a patched version of the Super Simple Blog Script that properly implements input validation and output escaping mechanisms. Additionally, organizations should ensure that magic_quotes_gpc is either enabled or implement proper parameterized queries and prepared statements to prevent SQL injection regardless of PHP configuration settings. Implementing proper input sanitization routines, using stored procedures, and applying the principle of least privilege for database accounts can significantly reduce the attack surface. From an operational security perspective, regular security audits and vulnerability assessments should be conducted to identify similar weaknesses in other applications. This vulnerability aligns with tactics described in the MITRE ATT&CK framework under the T1190 category for exploitation of known vulnerabilities, emphasizing the importance of maintaining up-to-date software and implementing robust input validation controls. Organizations should also consider implementing web application firewalls and database activity monitoring to detect and prevent exploitation attempts.