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AUSCERT External Security Bulletin Redistribution
Important: openstack-keystone security update
1 August 2014
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Increased Privileges -- Existing Account
Unauthorised Access -- Existing Account
CVE Names: CVE-2014-3520 CVE-2014-3476
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running openstack-keystone check for an updated version of the
software for their operating system.
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Red Hat Security Advisory
Synopsis: Important: openstack-keystone security update
Advisory ID: RHSA-2014:0994-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0994.html
Issue date: 2014-07-31
CVE Names: CVE-2014-3476 CVE-2014-3520
Updated openstack-keystone packages that fix two security issues are now
available for Red Hat Enterprise Linux OpenStack Platform 3.0 and 4.0.
The Red Hat Security Response Team has rated this update as having
Important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux OpenStack Platform 3.0 - noarch
Red Hat Enterprise Linux OpenStack Platform 4.0 - noarch
The OpenStack Identity service (keystone) authenticates and authorizes
OpenStack users by keeping track of users and their permitted activities.
The Identity service supports multiple forms of authentication, including
user name and password credentials, token-based systems, and AWS-style
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.
A flaw was found in the way keystone handled trusts. A trustee could use an
out-of-scope project ID to gain unauthorized access to a project if the
trustor had the required roles for that requested project. (CVE-2014-3520)
Red Hat would like to thank the OpenStack project for reporting
CVE-2014-3520; upstream acknowledges Jamie Lennox of Red Hat as the
original reporter. The CVE-2014-3476 issue was discovered by Steven Hardy
of Red Hat.
All openstack-keystone users are advised to upgrade to these updated
packages, which correct these issues.
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
5. Bugs fixed (https://bugzilla.redhat.com/):
1104524 - CVE-2014-3476 openstack-keystone: privilege escalation through trust chained delegation
1112668 - CVE-2014-3520 openstack-keystone: Keystone V2 trusts privilege escalation through user supplied project id
6. Package List:
Red Hat Enterprise Linux OpenStack Platform 3.0:
Red Hat Enterprise Linux OpenStack Platform 4.0:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2014 Red Hat, Inc.
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