users and roles in mongodb

Question

Following users are created in mongodb. First user created with name "user" having read write role for "project" database use project

db.createUser(
    {
      user: "user",
      pwd: "user123",
      roles: [
         { role: "readWrite", db: "project" },
         { role: "readAnyDatabase", db:"admin" }
      ]
    }
)

second user created with name "stud" having read write role for "student" database use student

db.createUser(
    {
      user: "stud",
      pwd: "stud123",
      roles: [
         { role: "readWrite", db: "stud" },
         { role: "readAnyDatabase", db:"admin" }
      ]
    }
)

When I connected to database having name project using "user" I am getting project as well as student database and also to able to create new collection in student database. I haven't give any permission to "user" to access student database. Still it is possible to access student database. How to avoid it?

Answer 1

You've given 'user' the readAnyDatabase permission. This means it has read access for every database in the cluster. Change the permission to readOnly so user will have read permission on admin DB only.