CVE-2009-0452 in Online Grades
Summary
by MITRE
Multiple SQL injection vulnerabilities in parents/login.php in Online Grades 3.2.4, when magic_quotes_gpc is disabled, allow remote attackers to execute arbitrary SQL commands via the (1) uname or (2) pass parameter.
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Analysis
by VulDB Data Team • 07/26/2025
The vulnerability identified as CVE-2009-0452 represents a critical SQL injection flaw within the Online Grades 3.2.4 web application, specifically targeting the parents/login.php script. This vulnerability arises from insufficient input validation and sanitization mechanisms that fail to properly handle user-supplied data before incorporating it into database queries. The flaw becomes particularly dangerous when the PHP configuration parameter magic_quotes_gpc is disabled, which removes the automatic escaping of special characters that would otherwise provide basic protection against such attacks.
The technical implementation of this vulnerability stems from the application's failure to employ proper parameterized queries or input sanitization techniques when processing the uname and pass parameters. Attackers can exploit this weakness by crafting malicious input strings that contain SQL command sequences, which are then directly executed within the database context. The vulnerability specifically affects the authentication mechanism of the application, potentially allowing unauthorized individuals to bypass login controls and gain administrative access to the system. This type of attack falls under the common weakness enumeration CWE-89, which categorizes SQL injection vulnerabilities as a fundamental flaw in input validation and data handling processes.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with the capability to execute arbitrary database commands with the privileges of the database user account. Successful exploitation could result in complete system compromise, data exfiltration, modification of student records, and potential lateral movement within the network infrastructure. The vulnerability's remote nature means that attackers do not require physical access to the system, making it particularly dangerous for web-based applications. According to the attack tactics framework, this vulnerability aligns with the initial access and privilege escalation techniques described in the MITRE ATT&CK matrix, specifically targeting the credential access and execution phases.
Mitigation strategies for this vulnerability should focus on immediate remediation through proper input validation and parameterized query implementation. The most effective approach involves replacing direct string concatenation with prepared statements or parameterized queries that separate SQL commands from data inputs. Organizations should also implement proper input sanitization routines and ensure that magic_quotes_gpc is properly configured, though this should not be relied upon as the sole defense mechanism. Additionally, comprehensive security testing including automated vulnerability scanning and manual penetration testing should be conducted to identify similar weaknesses throughout the application codebase. The implementation of web application firewalls and intrusion detection systems can provide additional layers of protection while the application is being patched. Regular security updates and code reviews should be established to prevent similar vulnerabilities from being introduced in future versions of the software.