dotcloud/docker — pull request #3055 by kevinwallace (2013-12-04 23:03:42+00:00)
Title: Vagrantfile: Verify integrity of the VirtualBox Guest Additions.

VBoxGuestAdditions_4.3.2.iso is downloaded over HTTP, which provides
no integrity guarantees. This should make it safer to provision a
Vagrant box over an untrusted network connection.