6.8 - RHSA-2015:1897

Problem Description:

Updated openstack-glance packages that fix two security issues are now available for Red Hat Enterprise Linux OpenStack Platform 5.0, 6.0, and 7.0.

Red Hat Product Security has rated this update as having Moderate 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 5.0 for RHEL 6 - noarch Red Hat Enterprise Linux OpenStack Platform 5.0 for RHEL 7 - noarch Red Hat Enterprise Linux OpenStack Platform 6.0 for RHEL 7 - noarch Red Hat Enterprise Linux OpenStack Platform 7.0 for RHEL 7 - noarch

3. Description:

OpenStack Image service (glance) provides discovery, registration, and delivery services for disk and server images. It provides the ability to copy or snapshot a server image, and immediately store it away. Stored images can be used as a template to get new servers up and running quickly and more consistently than installing a server operating system and individually configuring additional services.

A flaw was discovered in the OpenStack Image service where a tenant could manipulate the status of their images by submitting an HTTP PUT request together with an 'x-image-meta-status' header. A malicious tenant could exploit this flaw to reactivate disabled images, bypass storage quotas, and in some cases replace image contents (where they have owner access). Setups using the Image service's v1 API could allow the illegal modification of image status. Additionally, setups which also use the v2 API could allow a subsequent re-upload of image contents. (CVE-2015-5251)

A race-condition flaw was discovered in the OpenStack Image service. When images in the upload state were deleted using a token close to expiration, untracked image data could accumulate in the back end. Because untracked data does not count towards the storage quota, an attacker could use this flaw to cause a denial of service through resource exhaustion. (CVE-2015-5286)

Red Hat would like to thank the OpenStack project for reporting these issues. Upstream acknowledges Hemanth Makkapati of Rackspace as the original reporter of CVE-2015-5251, and Mike Fedosin and Alexei Galkin of Mirantis as the original reporters of CVE-2015-5286.

All openstack-glance users are advised to upgrade to these updated packages, which correct these issues. After installing the updated packages, running Image service services will be restarted automatically.

4. 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/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1263511 - CVE-2015-5251 openstack-glance allows illegal modification of image status 1267516 - CVE-2015-5286 openstack-glance: Storage overrun by deleting images