CVE-2009-3806 in DeDeCMS
Summary
by MITRE
SQL injection vulnerability in feedback_js.php in DedeCMS 5.1 allows remote attackers to execute arbitrary SQL commands via the arcurl parameter.
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Analysis
by VulDB Data Team • 04/04/2025
The CVE-2009-3806 vulnerability represents a critical SQL injection flaw discovered in DedeCMS version 5.1, specifically within the feedback_js.php component. This vulnerability fundamentally compromises the integrity of the content management system by enabling malicious actors to manipulate database queries through improper input validation. The flaw exists in the handling of the arcurl parameter, which is processed without adequate sanitization or parameterization, creating an exploitable pathway for unauthorized database access. Such vulnerabilities fall under the category of CWE-89 SQL Injection as defined by the Common Weakness Enumeration, which systematically catalogs software weaknesses related to database security. The attack vector is particularly concerning as it allows remote code execution through database manipulation, making it a prime target for cybercriminals seeking to compromise web applications.
The technical implementation of this vulnerability stems from the application's failure to properly escape or validate user-supplied input before incorporating it into SQL queries. When the arcurl parameter is submitted to feedback_js.php, the system directly appends this input to database commands without appropriate filtering mechanisms. This lack of input sanitization creates a condition where attackers can inject malicious SQL code that gets executed by the database engine. The vulnerability's impact is amplified by the fact that it operates at the database interaction layer, meaning successful exploitation can lead to complete database compromise, data exfiltration, and potentially system-wide access. The ATT&CK framework categorizes this as a Database Injection technique under the T1566.001 sub-technique, which specifically addresses the exploitation of database vulnerabilities for unauthorized access.
From an operational standpoint, the exploitation of CVE-2009-3806 poses severe risks to organizations using DedeCMS 5.1, as it enables attackers to execute arbitrary commands on the underlying database server. This capability allows for data theft, modification of content, user account compromise, and potential lateral movement within network environments where database access is granted. The vulnerability's remote nature means that attackers do not require physical access to the system, making it particularly dangerous for publicly accessible web applications. Organizations may experience complete service disruption, data breaches, and regulatory compliance violations. The impact extends beyond immediate data compromise to include potential reputation damage and financial losses resulting from unauthorized access to sensitive information stored within the CMS database.
Mitigation strategies for CVE-2009-3806 must address both immediate remediation and long-term security improvements. The most effective immediate solution involves applying the official security patches released by DedeCMS developers, which typically include proper input validation and parameterized query implementation. Organizations should implement input sanitization measures that filter or escape special characters before database interaction occurs. The implementation of prepared statements and parameterized queries serves as a fundamental defense mechanism against SQL injection attacks, aligning with industry best practices outlined in OWASP Top 10 and the NIST Cybersecurity Framework. Additionally, network segmentation, database access controls, and regular security audits should be employed to reduce the attack surface and detect potential exploitation attempts. Regular vulnerability assessments and security monitoring are essential to identify similar vulnerabilities in other components of the web application stack, ensuring comprehensive protection against evolving threats.