Roy is a senior penetration tester working in a Gensolutions Inc, a US based company

Roy is a senior penetration tester working in a Gensolutions Inc, a US based company. The company uses the Oracle database to store all its data. It also uses Oracle DataBase Vault in order to restrict user from accessing the confidential data from their database. One day Roy was asked to find all the possible vulnerabilities of the company's Oracle Database Vault. Roy tried different kinds of attacks to penetrate into the company's Oracle DB Valut and succeeded. Which of the following attack helped Roy to bypass Gensolutions Oracle DB Vault? Select one

Denial of service attack

SQL Injection

Session Hijacking

Sniffing