Bug 1637327 (CVE-2018-14662) - CVE-2018-14662 ceph: authenticated user with read only permissions can steal dm-crypt / LUKS key
Summary: CVE-2018-14662 ceph: authenticated user with read only permissions can steal ...
Status: NEW
Alias: CVE-2018-14662
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=low,public=20190107,reported=2...
Keywords: Security
Depends On: 1637411 1637412 1665972
Blocks: 1628199
TreeView+ depends on / blocked
 
Reported: 2018-10-09 06:16 UTC by Sam Fowler
Modified: 2019-06-08 23:39 UTC (History)
14 users (show)

(edit)
It was found that authenticated ceph user with read only permissions could steal dm-crypt encryption keys used in ceph disk encryption.
Clone Of:
(edit)
Last Closed:


Attachments (Terms of Use)

Description Sam Fowler 2018-10-09 06:16:16 UTC
The Ceph documentation states that clients should use "allow r" mon caps[1][2][3], which will grant full read access to all config-keys stored in the monitor -- including the LUKS encryption keys for OSD.

This is in contrast to the original dm-crypt key management feature[4], which indicates that these keys should be restricted to only the lockbox user.


Upstream Documentation:

[1] http://docs.ceph.com/docs/master/cephfs/client-auth/
[2] http://docs.ceph.com/docs/emperor/rados/operations/authentication/#add-a-key
[3] http://docs.ceph.com/docs/master/rados/operations/user-management/#add-a-user
[4] https://tracker.ceph.com/projects/ceph/wiki/Osd_-_simple_ceph-mon_dm-crypt_key_management

Comment 4 Siddharth Sharma 2019-01-14 15:18:37 UTC
External References:

https://ceph.com/releases/13-2-4-mimic-released

Comment 5 Siddharth Sharma 2019-01-14 15:22:26 UTC
Created ceph tracking bugs for this issue:

Affects: fedora-all [bug 1665972]

Comment 6 Siddharth Sharma 2019-01-15 03:45:10 UTC
upstream fix

https://github.com/ceph/ceph/commit/a2acedd2a7e12d58af6db35edbd8a9d29c557578


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