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Red Hat OpenStack 3.0 RHSA-2014:0368-01 Moderate Token Flaws

red hat
Calendar Grey April 3, 2014
Dist Redhat Esm H88
Cautionary Red Hat alert regarding openstack-keystone, prompting critical update measures to address vulnerabilities.
Updated openstack-keystone packages that fix two security issues are now available for Red Hat Enterprise Linux OpenStack Platform 3.0

Solution

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 https://access.redhat.com/site/articles/11258

Summary

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 logins.
It was found that the ec2token API in keystone, which is used to generate EC2-style (Amazon Elastic Compute Cloud) credentials, could generate a token not scoped to a particular trust when creating a token from a received trust-scoped token. A remote attacker could use this flaw to retrieve a token that elevated their privileges to all of the trustor's roles. Note that only OpenStack Identity setups that have EC2-style authentication enabled were affected. (CVE-2013-6391)
It was found that the the memcache token back end of OpenStack Identity did not correctly invalidate a revoked trust token, allowing users with revoked tokens to retain access to services they should no longer be able to access. Note that only OpenStack Identity setups using the memcache back end for tokens were affected. (CVE-2014-2237)
Red Hat would like to thank Jeremy Stanley of the OpenStack Project for reporting CVE-2013-6391. Upstream acknowledges Steven Hardy of Red Hat as the original reporter of CVE-2013-6391.
All openstack-keystone users are advised to upgrade to these updated packages, which correct these issues.

Topics%20covered

Topics Covered

security advisory security update moderate severity authentication issues token management Red Hat OpenStack identity service

References

https://access.redhat.com/security/cve/CVE-2013-6391 https://access.redhat.com/security/cve/CVE-2014-2237 https://access.redhat.com/security/updates/classification#moderate

Package List

OpenStack 3:
Source:
noarch: openstack-keystone-2013.1.5-2.el6ost.noarch.rpm openstack-keystone-doc-2013.1.5-2.el6ost.noarch.rpm python-keystone-2013.1.5-2.el6ost.noarch.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key#package


Advisory ID: RHSA-2014:0368-01
Product: Red Hat OpenStack
Advisory URL: https://access.redhat.com/errata/RHSA-2014:0368.html
Issue date: 2014-04-03

Topic

Updated openstack-keystone packages that fix two security issues are nowavailable for Red Hat Enterprise Linux OpenStack Platform 3.0.The Red Hat Security Response Team has rated this update as having Moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory security update moderate severity authentication issues token management Red Hat OpenStack identity service

Relevant Releases Architectures

OpenStack 3 - noarch

Bugs Fixed

1039164 - CVE-2013-6391 OpenStack Keystone: trust circumvention through EC2-style tokens

1071434 - CVE-2014-2237 openstack-keystone: trustee token revocation does not work with memcache backend

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