You can use qemu package.
apt-get install qemu
After you can check and load network block device kernel-module:
rmmod nbd modprobe nbd max_part=8
Then you connect image:
qemu-nbd -c /dev/nbd0 image.vdi
And mount (don’t forget create mount directory /media/image):
mount /dev/nbd0p1 /media/image
And unmount:
qemu-nbd -d /dev/nbd0