1bf55f1eb0
All OSSN authors, added under the "Author:" metadata field Change-Id: I81771dd3ec8d2c133ebc6ddf9f2c5f0f958d603a Closes-Bug: #1599064
46 lines
1.8 KiB
Plaintext
46 lines
1.8 KiB
Plaintext
Cinder wipe fails in an insecure manner on Grizzly
|
||
---
|
||
|
||
### Summary ###
|
||
A configuration error can prevent the secure erase of volumes in Cinder on
|
||
Grizzly, potentially allowing a user to recover another user’s data.
|
||
|
||
### Affected Services / Software ###
|
||
Cinder, Grizzly
|
||
|
||
### Discussion ###
|
||
In Cinder on Grizzly, a configurable method to perform a secure erase of
|
||
volumes was added. In the event of a misconfiguration no secure erase will
|
||
be performed.
|
||
|
||
The default code path in Cinder’s clear_volume() method, which is taken
|
||
in the event of a configuration error, results in no wiping of the volume -
|
||
even in the event that the user had flagged the volume for wiping.
|
||
|
||
This is the same behaviour as if the volume_clear = ‘none’ option was
|
||
selected. This could let an attacker recover data from a volume that was
|
||
intended to be securely erased. Examples of possible incorrect
|
||
configuration options include values that would appear to result in a
|
||
secure erase, for example “volume_clear = true” or “volume_clear =
|
||
yes”.
|
||
|
||
In the event of a misconfiguration resulting in this issue, the message
|
||
“Error unrecognized volume_clear option” should be present in log
|
||
files.
|
||
|
||
### Recommended Actions ###
|
||
- Create and clear a volume (cinder create --display_name erasetest 10;
|
||
cinder delete erasetest)
|
||
- Review log files for the above error message (grep “Error unrecognized
|
||
volume_clear option” <logfile>)
|
||
- Review configuration files to ensure that the valid options ‘zero’ or
|
||
‘shred’ are specified.
|
||
|
||
|
||
### Contacts / References ###
|
||
Author: Doug Chivers, HP
|
||
This OSSN : https://wiki.openstack.org/wiki/OSSN/OSSN-0016
|
||
Original LaunchPad Bug : https://bugs.launchpad.net/cinder/+bug/1322766
|
||
OpenStack Security ML : openstack-security@lists.openstack.org
|
||
OpenStack Security Group : https://launchpad.net/~openstack-ossg
|