From this webpage screenshot, the following key information about the vulnerability can be obtained: ### Vulnerability Overview - **Vulnerability Name**: Jigsaw Report Contains PostgreSQL JDBC RCE Vulnerability #4010 - **Vulnerability Type**: Remote Code Execution (RCE) - **Affected Versions**: Not explicitly specified, but likely involves specific versions of Jigsaw Report software ### Vulnerability Details - **Description**: When using PostgreSQL JDBC to connect to a database, insufficient validation and filtering of user-supplied data allows attackers to execute arbitrary code by crafting malicious SQL statements. - **Exploitation Method**: Attackers can inject malicious Java code by modifying JDBC URL parameters in the database configuration, thereby executing arbitrary commands on the target server. ### Technical Details - **Code Snippet**: The screenshot displays relevant Java code fragments, particularly those related to database connection and SQL queries. Key code is as follows: ```java // Database connection configuration String url = "jdbc:postgresql://localhost:5432/testdb"; String username = "testuser"; String password = "testpassword"; // Create connection Connection conn = DriverManager.getConnection(url, username, password); // Execute SQL query Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery("SELECT * FROM users"); ``` - **Vulnerability Point**: The JDBC URL parameters are processed without strict validation or escaping, enabling attackers to inject malicious code. ### Exploitation Example - **Attack Example**: The screenshot demonstrates how an attacker can inject malicious code by modifying the JDBC URL parameter, for example: ```sql jdbc:postgresql://localhost:5432/testdb?connectTimeout=0&socketFactory=com.attacker.MaliciousSocketFactory ``` Here, `com.attacker.MaliciousSocketFactory` is a malicious Java class that can execute arbitrary code on the target server. ### Mitigation Recommendations - **Remediation**: Strictly validate and escape user-supplied data to prevent direct use in SQL queries or database connection strings. - **Security Measures**: Use prepared SQL statements (PreparedStatement) to prevent SQL injection attacks, and regularly update and patch related software to reduce security risks. ### Summary This vulnerability arises from improper handling of user input, allowing attackers to execute arbitrary code by crafting malicious JDBC URL parameters. Developers are advised to strengthen input validation and escaping, and adopt secure coding practices to prevent such attacks.