[rules-users] About license

Hello, We use JBoss Rules 4.0.7 in a commercial project. But in order to link the drools UI with our own UI, we need to add a login page and modify the web.xml to the drools-jbrms.war. Is it legal for us to this in a commercial project? And we have noticed that the drools is under ASL 2.0, does its dependencies are also under this license? Thanks!