Bug 1104524 (CVE-2014-3476)

Summary: CVE-2014-3476 openstack-keystone: privilege escalation through trust chained delegation
Product: [Other] Security Response Reporter: Garth Mollett <gmollett>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: abaron, aortega, apevec, ayoung, chrisw, gkotton, gmollett, lhh, markmc, nkinder, rbryant, sclewis, security-response-team, yeylon
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
A flaw was found in keystone's chained delegation. A trustee able to create a delegation from a trust or an OAuth token could misuse identity impersonation to bypass the enforced scope, possibly allowing them to obtain elevated privileges to the trustor's projects and roles.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2014-08-01 05:43:56 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1104538, 1104539, 1104576, 1104577, 1108964, 1108965, 1108967    
Bug Blocks: 1104532    
Attachments:
Description Flags
CVE-2014-3476 patch for stable/havana
none
CVE-2014-3476 patch for stable/icehouse
none
CVE-2014-3476 patch for master (juno) none

Description Garth Mollett 2014-06-04 07:58:17 UTC 
Openstack VMT reports:

Title: Keystone privilege escalation through trust chained delegation
Reporter: Steven Hardy (Red Hat)
Products: Keystone
Versions: up to 2013.2.3, and 2014.1 to 2014.1.1

Description:
Steven Hardy from Red Hat reported a vulnerability in Keystone chained delegation.
By creating a delegation from a trust or OAuth token, a trustee may abuse the identity impersonation against keystone and circumvent the enforced scope, resulting in potential elevated privileges to any of the trustor's projects and or roles. All Keystone deployments configured to enable trusts are affected, which has been the default since Grizzly.
Comment 1 Garth Mollett 2014-06-04 08:12:02 UTC 
Acknowledgements:

This issue was discovered by Steven Hardy of Red Hat.
Comment 5 Vincent Danen 2014-06-09 16:56:42 UTC 
Created attachment 904902 [details]
CVE-2014-3476 patch for stable/havana
Comment 6 Vincent Danen 2014-06-09 16:57:20 UTC 
Created attachment 904920 [details]
CVE-2014-3476 patch for stable/icehouse
Comment 7 Vincent Danen 2014-06-09 16:57:48 UTC 
Created attachment 904933 [details]
CVE-2014-3476 patch for master (juno)
Comment 8 Alan Pevec 2014-06-13 01:01:21 UTC 
(In reply to Vincent Danen from comment #5)
> Created attachment 904902 [details]
> CVE-2014-3476 patch for stable/havana

There has been a minor change in posted Havana review (unit tests only):
https://review.openstack.org/#/c/99703/1..2/keystone/tests/test_v3_auth.py,unified
Comment 9 Alan Pevec 2014-06-13 01:02:28 UTC 
This is now public
 http://lists.openstack.org/pipermail/openstack-announce/2014-June/000240.html

Please create Fedora clone.
Comment 10 Murray McAllister 2014-06-13 02:25:13 UTC 
Created openstack-keystone tracking bugs for this issue:

Affects: fedora-all [bug 1108964]
Affects: epel-6 [bug 1108965]
Comment 14 Martin Prpič 2014-07-31 14:50:37 UTC 
IssueDescription:

A flaw was found in keystone's chained delegation. A trustee able to create a delegation from a trust or an OAuth token could misuse identity impersonation to bypass the enforced scope, possibly allowing them to obtain elevated privileges to the trustor's projects and roles.
Comment 15 errata-xmlrpc 2014-07-31 15:18:13 UTC 
This issue has been addressed in following products:

  OpenStack 3 for RHEL 6
  OpenStack 4 for RHEL 6

Via RHSA-2014:0994 https://rhn.redhat.com/errata/RHSA-2014-0994.html
Comment 16 Fedora Update System 2014-08-07 15:24:17 UTC 
openstack-keystone-2013.2.3-5.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.