CVE-2007-0520 in Unique Ads
Summary
by MITRE
SQL injection vulnerability in banner.php in Unique Ads (UDS) 1.x allows remote attackers to execute arbitrary SQL commands via the bid parameter.
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Analysis
by VulDB Data Team • 10/06/2017
The vulnerability identified as CVE-2007-0520 represents a critical SQL injection flaw within the Unique Ads (UDS) 1.x web application, specifically affecting the banner.php script. This vulnerability resides in the handling of user-supplied input through the bid parameter, which is processed without adequate sanitization or validation mechanisms. The flaw enables remote attackers to inject malicious SQL code directly into the database query execution flow, potentially compromising the entire backend database system. The vulnerability classifies under CWE-89 which specifically addresses SQL injection weaknesses where untrusted data is incorporated into SQL commands without proper escaping or parameterization. This type of vulnerability is particularly dangerous as it can be exploited from remote locations without requiring authentication or prior access to the system.
The technical exploitation of this vulnerability occurs when an attacker submits a malicious bid parameter value to the banner.php script. The application fails to properly validate or sanitize this input before incorporating it into database queries, allowing the attacker to manipulate the SQL execution context. Through careful crafting of the bid parameter, an attacker can inject additional SQL commands that execute with the privileges of the database user account associated with the web application. This can result in unauthorized data access, modification, or deletion, potentially leading to complete database compromise. The vulnerability demonstrates a classic lack of input validation and output encoding practices that are fundamental to preventing injection attacks.
The operational impact of this vulnerability extends beyond simple data theft or modification. Successful exploitation can lead to complete system compromise, as attackers may escalate privileges to gain administrative access to the database server. The vulnerability affects the confidentiality, integrity, and availability of the web application and its underlying data. Attackers can leverage this weakness to extract sensitive information including user credentials, personal data, and business-critical information stored in the database. Additionally, the vulnerability can be used as a stepping stone for further attacks within the network infrastructure, as database servers often contain interconnected systems and can provide access to other network resources. This aligns with ATT&CK technique T1071.004 which covers application layer protocol manipulation, and T1046 which addresses network service discovery.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and parameterized queries. The recommended approach involves using prepared statements or parameterized queries for all database interactions, ensuring that user input is never directly concatenated into SQL commands. Input validation should be implemented at multiple layers including application-level filtering, output encoding, and proper error handling. The web application should also implement proper access controls and least privilege principles for database connections, limiting the potential damage from successful exploitation. Additionally, regular security assessments, code reviews, and vulnerability scanning should be conducted to identify similar weaknesses in other parts of the application. The remediation process should include immediate patching of the affected application version, as well as implementing comprehensive security measures to prevent similar vulnerabilities from occurring in other components of the system. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts.