CVE-2009-4721 in Aw-bannerad
Summary
by MITRE
Multiple SQL injection vulnerabilities in Admin/index.asp in Andrews-Web (A-W) BannerAd 1.0 allow remote attackers to execute arbitrary SQL commands via the (1) User and (2) Password parameters. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 05/02/2026
The vulnerability identified as CVE-2009-4721 represents a critical SQL injection flaw in Andrews-Web BannerAd 1.0 software, specifically within the Admin/index.asp component. This vulnerability exposes the application to remote code execution risks through improper input validation mechanisms. The affected parameters User and Password in the administrative interface create pathways for malicious actors to inject arbitrary SQL commands directly into the database layer, bypassing normal authentication procedures. Such vulnerabilities fall under the CWE-89 category of SQL Injection, which is classified as a high-severity weakness in the Common Weakness Enumeration system. The attack vector operates through unvalidated user input that gets concatenated directly into SQL query strings without proper sanitization or parameterization.
The technical exploitation of this vulnerability enables attackers to manipulate the underlying database through crafted input sequences that alter the intended execution flow of SQL commands. When the application processes the User and Password parameters, it fails to implement proper input filtering or prepared statement mechanisms, allowing malicious SQL syntax to be interpreted and executed by the database engine. This creates opportunities for unauthorized data access, modification, or deletion, potentially leading to complete system compromise. The vulnerability demonstrates a fundamental lack of input validation security controls that should be implemented at the application layer to prevent such injection attacks. According to MITRE ATT&CK framework, this vulnerability maps to T1190 - Exploit Public-Facing Application, where adversaries leverage exposed application interfaces to gain unauthorized access to backend systems.
The operational impact of this vulnerability extends beyond simple data theft, as successful exploitation can result in complete administrative control over the affected BannerAd system. Attackers can leverage the SQL injection to escalate privileges, extract sensitive user credentials, modify banner advertising content, or even establish persistent backdoors within the application environment. The remote nature of the attack means that exploitation can occur from any internet-connected device without requiring physical access to the target system. Organizations using this vulnerable software face significant risks including data breaches, service disruption, and potential regulatory compliance violations. The vulnerability's persistence across multiple parameters indicates a systemic design flaw in the application's security architecture rather than an isolated incident. Security professionals should consider implementing comprehensive input validation, output encoding, and least privilege access controls as mitigation strategies to address similar vulnerabilities in web applications.