** Changed in: nova
Status: In Progress => Won't Fix
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https://bugs.launchpad.net/bugs/1627597
Title:
Nova instance backup with rotation 0 creates backup and deletes it
immediately
Status in OpenStack Compute (nova):
Won't Fix
Status in OpenStack Security Advisory:
Won't Fix
Bug description:
If you create an instance backup by passing rotation 0 to the backup
api, nova creates an image and takes a snapshot of an instance and
then deletes it immediately. Any malicious user can use this loophole
by calling backup api for all instances belonging to his/her project
causing consumption of glance and nova resources at the expense of
service provider.
Steps to reproduce:
1. Create the instance
$ nova boot --flavor <flavor_id> --image <image_id> <instance_name>
2. Create the instance backup using the backup api by giving the
rotation parameter value as 0
$ nova backup <instance_id> <name> daily 0
3. Check the glance image list
$ glance image-list
Output:
In glance images you will not found backup image as it will be deleted
immediately after creation.
Expected result:
If user passes rotation 0, then nova shouldn’t create an image and take a
snapshot of an instance and upload it to glance service or minimum value of
rotation should be changed from 0 to 1.
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