CVE-2007-3354 in NetClassifieds
Summary
by MITRE
Multiple SQL injection vulnerabilities in NetClassifieds Premium Edition allow remote attackers to execute arbitrary SQL commands via the s_user_id parameter to ViewCat.php and other unspecified vectors. NOTE: the CatID/ViewCat.php, CatID/gallery.php, and ItemNum/ViewItem.php vectors are already covered by CVE-2005-3978.
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Analysis
by VulDB Data Team • 10/30/2025
The vulnerability described in CVE-2007-3354 represents a critical SQL injection flaw affecting NetClassifieds Premium Edition software. This vulnerability specifically targets the s_user_id parameter within ViewCat.php and other unspecified vectors, creating a pathway for remote attackers to execute arbitrary SQL commands against the underlying database system. The flaw demonstrates the classic characteristics of SQL injection vulnerabilities where user-supplied input is inadequately sanitized before being incorporated into database queries, allowing malicious actors to manipulate the intended query execution flow.
The technical implementation of this vulnerability stems from insufficient input validation and parameter sanitization within the application's database interaction layer. When the s_user_id parameter is processed, the application fails to properly escape or validate the input, enabling attackers to inject malicious SQL code that gets executed within the database context. This weakness falls under the Common Weakness Enumeration category CWE-89, which specifically addresses SQL injection vulnerabilities where untrusted data is directly incorporated into SQL command strings without proper sanitization or parameterization.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with potentially full database access and control. Successful exploitation could enable unauthorized data retrieval, modification, or deletion of classified advertisements and user information stored within the system. Attackers might also leverage this vulnerability to escalate privileges, extract sensitive user credentials, or establish persistent access points within the affected network infrastructure. The vulnerability's remote nature means that attackers do not require physical access to the system or local network presence, making it particularly dangerous for internet-facing applications.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1071.004 for application layer protocol manipulation and T1190 for exploit public-facing application. The attack surface extends beyond the immediate application to potentially compromise the entire backend database infrastructure, especially when considering that many classified advertising systems store sensitive user data, transaction records, and business-critical information. Organizations should implement comprehensive network segmentation and database access controls as additional defensive measures. The vulnerability highlights the importance of input validation, parameterized queries, and regular security assessments to prevent similar issues in legacy systems that may not receive ongoing security updates.
Mitigation strategies should include immediate implementation of proper input validation, parameterized database queries, and web application firewall rules to filter suspicious SQL injection patterns. Organizations should also conduct thorough code reviews to identify similar vulnerabilities in other application components and implement proper database user permissions to limit potential damage from successful attacks. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security practices and the risks associated with legacy software systems that may no longer receive security patches or updates from vendors.