[Openstack-security] [Bug 1372375] Re: Attaching LVM encrypted volumes (with LUKS) could cause data loss if LUKS headers get corrupted

Sean McGinnis sean_mcginnis at dell.com
Thu Sep 29 02:36:10 UTC 2016


** Changed in: cinder
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/1372375

Title:
  Attaching LVM encrypted volumes (with LUKS) could cause data loss if
  LUKS headers get corrupted

Status in Cinder:
  Won't Fix
Status in OpenStack Compute (nova):
  Invalid
Status in OpenStack Security Advisory:
  Won't Fix

Bug description:
  I have doubts about the flow of the volume attaching operation, as
  defined in /usr/lib/python2.6/site-
  packages/nova/volume/encryptors/luks.py.

  If the device is not recognized to be a valid luks device, the script is luks formatting it! So if for some reason the luks header get corrupted, it erases the whole data.
  To manage corrupted headers there are the 

      cryptsetup luksHeaderBackup

  and

      cryptsetup luksHeaderRestore

  commands that respectively do the backup and the restore of the
  headers.

  I think that the process has to be reviewed, and the luksFormat
  operation has to be performed during the volume creation.

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