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513534c
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Wondering if we can use the new service token system to secure this quickly. Only allow requests with a Cinder and Nova service token attached to create images with RBD locations, due to implied delete permission. In a similar way, we could hide the location URL to all list/show images that don't have the service token.
I think it's good to also not allow duplicate image locations. Snapshots are cheap in ceph, as I understand it, so the system should always create another snapshot. But that seems less of a sercurity thing, more a robustness thing.
Now I am sure there are better fixes, but that service token policy fix seems a quick-ish fix to me? I could be wrong.
PS
Why were users wanting to create snapshots from ceph urls, admin only thing really?
PPS
Doesn't your spec fail to protect from people guessing / knowning a random users disk and just deleting it? I might have missread it.