oss-security - [OSSA 2016-005] Potential reuse of revoked Identity tokens (CVE-2015-7546)

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <56ABC23C.3080202@redhat.com>
Date: Fri, 29 Jan 2016 19:49:16 +0000
From: Tristan Cacqueray <tdecacqu@...hat.com>
To: oss-security@...ts.openwall.com
Subject: [OSSA 2016-005] Potential reuse of revoked Identity tokens
 (CVE-2015-7546)

=========================================================
OSSA-2016-005: Potential reuse of revoked Identity tokens
=========================================================

:Date: January 29, 2016
:CVE: CVE-2015-7546


Affects
~~~~~~~
- Keystone: <= 2015.1.2, >= 8.0.0 <= 8.0.1
- Keystonemiddleware: >= 1.5.0 <= 1.5.3, >= 1.6.0 <= 2.3.2


Description
~~~~~~~~~~~
Liu Sheng reported a vulnerability in Keystone. By manipulating a
token content, an authenticated user may prevent its revocation. This
can allow unauthorized access to cloud resources if a revoked token is
intercepted by an attacker. Only keystone setups using PKI or PKIZ
token are affected


Patches
~~~~~~~
- https://review.openstack.org/266045 (keystone) (Kilo)
- https://review.openstack.org/266607 (keystonemiddleware) (Kilo)
- https://review.openstack.org/266022 (keystone) (Liberty)
- https://review.openstack.org/265988 (keystonemiddleware) (Liberty)
- https://review.openstack.org/258141 (keystone) (Mitaka)
- https://review.openstack.org/258143 (keystonemiddleware) (Mitaka)


Credits
~~~~~~~
- Liu Sheng from Huawei (CVE-2015-7546)


References
~~~~~~~~~~
- https://bugs.launchpad.net/bugs/1490804
- https://wiki.openstack.org/wiki/OSSN/OSSN-0062
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7546


Notes
~~~~~
- The keystone fix is included in 2015.1.3 (Kilo) and will be included
  in a future 8.0.2 (Liberty) releases.
- The keystonemiddleware fix will be included in future 1.5.4 (Kilo)
  and 2.3.3 (Liberty) releases.
- Both keystone and keystonemiddleware needs to be updated

--
Tristan Cacqueray
OpenStack Vulnerability Management Team


Download attachment "signature.asc" of type "application/pgp-signature" (474 bytes)

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.