The fix is in Rocky: spec: https://specs.openstack.org/openstack/glance- specs/specs/rocky/implemented/glance/mitigate-ossn-0075.html
code: http://git.openstack.org/cgit/openstack/glance/commit/?h=stable/rocky&id=5cc9d999352c21d3f4b5c39d3ea9d4378ca86544 docs: http://git.openstack.org/cgit/openstack/glance/commit/?h=stable/rocky&id=23d4e0e9c07f1ff6646e2f6236ee9625abd2a5cb ** Changed in: glance Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to Glance. https://bugs.launchpad.net/bugs/1593799 Title: glance-manage db purge breaks image immutability promise Status in Glance: Fix Released Status in OpenStack Security Advisory: Opinion Status in OpenStack Security Notes: Fix Released Bug description: Using glance-manage db purge command opens possibility to recycle image-IDs. When the row is deleted from the database the ID is not known by glance anymore and thus it's not unique during the deployment lifecycle. This opens possibility to following scenario: 1) End user boots VM from private/public/shared image. 2) Image owner deletes the image. 3) glance-manage db purge gets ran which deletes record that image has ever existed. 4) Either malicious user or someone unintentionally creates new image with same ID (being same user so having access to the image by owning it or it becoming public/shared(/possbly community at some point)) 5) Same end user boots either snapshot from the original image or nova needs to migrate the VM to another host. Now the user's VM will be rebuilt on top of the new image. Worst case scenario the user had no idea that the image data changed in between. This behavior breaks Glance image immutability promise that has bee stated that the data related to image ID that has gone active will never change. We have two solutions for this. Either we introduce table to track the deleted image-IDs and get glance to cross check that during the image create or we leave it as is but issue notice/documentation what are the implications if the purge is used transferring the responsibility to the cloud operators. This was partially discussed in the virtual glance midcycle meetup so it might not be justified to leave this as private but I wanted to leave that decision to VMT. To manage notifications about this bug go to: https://bugs.launchpad.net/glance/+bug/1593799/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
