CVE-2006-5383 in Def-Blog
Summary
by MITRE
SQL injection vulnerability in comadd.php in Def-Blog 1.0.1 and earlier allows remote attackers to execute arbitrary SQL commands via the article parameter.
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Analysis
by VulDB Data Team • 04/24/2026
The vulnerability identified as CVE-2006-5383 represents a critical SQL injection flaw within the Def-Blog content management system version 1.0.1 and earlier. This vulnerability exists in the comadd.php script which handles comment addition functionality, making it a prime target for malicious actors seeking to compromise the underlying database infrastructure. The flaw stems from inadequate input validation and sanitization practices that fail to properly escape or filter user-supplied data before incorporating it into SQL query constructions. Attackers can exploit this weakness by manipulating the article parameter to inject malicious SQL code that executes with the privileges of the database user account, potentially leading to complete system compromise.
The technical implementation of this vulnerability aligns with CWE-89, which specifically addresses SQL injection weaknesses in software applications. The flaw operates by directly concatenating user input from the article parameter into SQL query strings without proper sanitization mechanisms. When a malicious user submits crafted SQL commands through this parameter, the web application processes these inputs without adequate validation, allowing the injected commands to execute against the database server. This type of vulnerability falls under the ATT&CK technique T1071.005 for application layer protocol manipulation, where attackers leverage web application weaknesses to manipulate database interactions. The vulnerability demonstrates a classic lack of input sanitization that violates fundamental secure coding practices and database security principles.
The operational impact of this vulnerability extends far beyond simple data theft, as it provides attackers with the capability to execute arbitrary database commands with potentially elevated privileges. Successful exploitation could result in unauthorized data access, data modification, or complete database compromise, depending on the permissions assigned to the database user account. Attackers might extract sensitive information including user credentials, personal data, or administrative access details that could facilitate further attacks. The vulnerability also enables attackers to manipulate or delete database content, potentially causing service disruption or data corruption. Given that Def-Blog was a relatively simple content management system, the database access granted through this vulnerability could provide attackers with comprehensive control over the entire blog platform and its associated data.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security improvements. The primary solution involves implementing proper input validation and parameterized queries to prevent user-supplied data from being interpreted as SQL commands. Developers should adopt prepared statements or parameterized queries that separate SQL code from user input, effectively neutralizing the injection threat. Additionally, input sanitization measures including character escaping and whitelist validation should be implemented to filter out potentially malicious content. The system should also enforce proper access controls and privilege separation, ensuring that database accounts used by web applications have minimal required permissions. Organizations should implement regular security assessments, code reviews, and vulnerability scanning to identify similar weaknesses in other components. This vulnerability highlights the critical importance of following secure coding practices and adhering to established security frameworks such as the OWASP Top Ten to prevent database injection attacks that can devastate system integrity and data confidentiality.