CVE-2006-0835 in Web Calendar Pro
Summary
by MITRE
SQL injection vulnerability in dropbase.php in MitriDAT Web Calendar Pro allows remote attackers to modify internal SQL queries and cause a denial of service (inaccessible database) via the tabls parameter.
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Analysis
by VulDB Data Team • 07/31/2017
The vulnerability identified as CVE-2006-0835 represents a critical SQL injection flaw within the MitriDAT Web Calendar Pro application, specifically affecting the dropbase.php script. This vulnerability resides in the handling of user-supplied input through the tabls parameter, which is processed without adequate sanitization or validation mechanisms. The flaw allows malicious actors to inject arbitrary SQL commands into the application's internal database queries, potentially enabling unauthorized data manipulation and system compromise.
The technical implementation of this vulnerability demonstrates a classic lack of input validation and proper parameter binding in the application's database interaction layer. When the tabls parameter is processed by dropbase.php, the application fails to employ prepared statements or proper escaping mechanisms to handle user input. This creates an exploitable condition where an attacker can construct malicious SQL payloads that directly modify the intended database operations. The vulnerability's classification as a SQL injection (CWE-89) indicates that the application's query construction process is vulnerable to manipulation through untrusted input sources.
The operational impact of this vulnerability extends beyond simple data modification to encompass potential complete system compromise and service disruption. Remote attackers can leverage this weakness to execute arbitrary SQL commands against the underlying database, potentially leading to data corruption, unauthorized access to sensitive information, or complete database unavailability. The described denial of service condition suggests that attackers may be able to render the database inaccessible through carefully crafted SQL injection payloads that either corrupt database structures or overwhelm database resources. This vulnerability directly impacts the availability and integrity of the calendar application's data storage system.
Mitigation strategies for this vulnerability should prioritize immediate implementation of input validation and parameterized queries throughout the application codebase. The most effective remediation involves implementing proper prepared statements or parameterized queries to ensure that user input cannot alter the structure of SQL commands. Additionally, input sanitization measures should be deployed to filter and validate all parameters received from external sources, particularly those used in database operations. The application should implement proper access controls and authentication mechanisms to limit database interaction capabilities to authorized users only. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts. This vulnerability highlights the critical importance of following secure coding practices and adhering to established security frameworks such as those recommended by the Open Web Application Security Project and the Center for Internet Security. The ATT&CK framework categorizes this vulnerability under the T1190 technique for SQL injection, emphasizing the need for proper input validation and parameterized queries as core defensive measures against such attacks.