GuestAdditions versions on your host (version) and guest (version) do not match

vbox-guest-additions.sh

#
# How to update VirtualBox Guest Additions with vagrant
#
$ vagrant up

# Check the guest additions version:
$ vagrant vbguest --status

# If there's a version mismatch, you should see this message:
# [default] GuestAdditions versions on your host (x.x.x) and guest (x.x.x) do not match.

$ vagrant ssh
$ cd /opt

# Download the version of the iso file you want to install from http://download.virtualbox.org/virtualbox
$ sudo wget -c http://download.virtualbox.org/virtualbox/4.3.36/VBoxGuestAdditions_4.3.36.iso -O VBoxGuestAdditions_4.3.36.iso

$ sudo mount VBoxGuestAdditions_4.3.36.iso -o loop /mnt
$ cd /mnt
$ sudo sh VBoxLinuxAdditions.run --nox11
$ cd /opt
$ sudo rm *.iso
$ sudo /etc/init.d/vboxadd setup
$ sudo chkconfig --add vboxadd
$ sudo chkconfig vboxadd on
$ exit

# Now check that the Guest Additions work
$ vagrant halt
$ vagrant up