SQL injection vulnerability in index.php in E-topbiz Online Store 1.0 allows remote attackers to execute arbitrary SQL commands via the cat_id parameter.
E-topbiz Online Store 1.0 is vulnerable to a critical SQL injection flaw, allowing attackers to inject malicious SQL commands through the cat_id parameter. This vulnerability can lead to complete database compromise, enabling attackers to steal sensitive data, modify content, or gain full control of the affected web application and potentially the underlying server.
Step 1: Payload Delivery: The attacker crafts a malicious SQL injection payload and includes it in the cat_id parameter of a GET or POST request to index.php.
Step 2: Request Processing: The web server receives the crafted request and passes it to the index.php script.
Step 3: Parameter Extraction: The index.php script extracts the value of the cat_id parameter.
Step 4: SQL Query Construction: The script constructs an SQL query, likely using string concatenation, incorporating the value of cat_id directly into the query without proper sanitization.
Step 5: Query Execution: The constructed SQL query, containing the attacker's payload, is executed by the database server.
Step 6: Payload Execution: The database server executes the injected SQL commands, allowing the attacker to perform actions such as retrieving data, modifying data, or gaining administrative access.
The vulnerability stems from insufficient input validation and sanitization of the cat_id parameter in index.php. The application directly incorporates user-supplied input into SQL queries without proper escaping or filtering. This allows attackers to craft malicious SQL statements that are executed by the database server. The root cause is a failure to implement parameterized queries or other safe methods for handling user input within SQL queries. The lack of input validation allows for the injection of SQL commands, leading to unauthorized access and control. Specifically, the code likely uses string concatenation to build SQL queries, making it susceptible to injection attacks. The absence of prepared statements or proper escaping mechanisms allows attackers to manipulate the query's logic.