T05 · Unauthorized Access and Privilege Escalation
Error
- Location
- scripts/query.py:241
- Finding
- Unrestricted SQL Execution Through a Privileged Database Account## Vulnerability Details **File Location**: `scripts/query.py:28-34`, `scripts/query.py:45-53`, and `scripts/query.py:241-245`; privileged account configured at `config.json:2-10` **Vulnerability Type**: Arbitrary SQL execution with excessive database privileges **Risk Level**: High ### Vulnerable Code ```python connection = mysql.connector.connect( host=db_config['host'], port=db_config['port'], user=db_config['user'], password=db_config['password'], database=db_config['database'], charset=db_config.get('charset', 'utf8mb4') ) ``` ```python def execute_query(connection, query, params=None): """Execute an SQL query.""" try: cursor = connection.cursor(dictionary=True) cursor.execute(query, params or ()) results = cursor.fetchall() cursor.close() return results except Error as e: print(f"Query execution failed: {e}") return [] ``` ```python elif choice == '8': sql = input("Enter an SQL query: ").strip() if sql: results = execute_query(connection, sql) display_results(results, "Custom query results") ``` ```json { "database": { "host": "localhost", "port": 3306, "user": "root", "password": "MySQL@123456", "database": "bid_analysis_db", "charset": "utf8mb4", "pool_size": 5, "autocommit": true } } ``` ### Technical Analysis The interactive query interface accepts arbitrary SQL text and passes it directly to `cursor.execute()`. Unlike the predefined queries, this execution path does not constrain the statement type, target tables, or affected database objects. The connection uses the MySQL `root` account. Consequently, the effective authorization boundary is determined by the root account rather than by the legitimate read and write requirements of the tender-analysis application. Input parameterization cannot mitigate this issue because the entire SQL statement, rather than an individual value, is at ...[truncated 1414 chars]
- Remediation
- ## Remediation Suggestions 1. Remove the arbitrary SQL option from production deployments. 2. Replace it with explicitly defined, parameterized, read-only query operations. 3. If an advanced query feature is required, parse statements with a real SQL parser and allow only a narrowly defined subset of single-statement `SELECT` queries. 4. Reject comments, multiple statements, data-definition statements, data-modification statements, stored-procedure calls, and access to schemas outside an explicit allowlist. 5. Replace the root account with a dedicated application account restricted to the required schema and operations. 6. Use separate accounts for imports and queries; the query account should have only required `SELECT` permissions. 7. Enable read-only transactions for query-only operations where supported. 8. Record security-relevant query attempts without logging credentials or sensitive query results.