RHSA-2017:0282 - Security Advisory

Topic

An update for openstack-nova, openstack-cinder, openstack-glance, and python-oslo-concurrency is now available for Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The Oslo concurrency library has utilities for safely running multi-thread, multi-process applications using locking mechanisms, and for running external processes.

OpenStack Compute (nova) launches and schedules large networks of virtual machines, creating a redundant and scalable cloud computing platform. Compute provides the software, control panels, and APIs required to orchestrate a cloud, including running virtual machine instances and controlling access through users and projects.

OpenStack Image Service (glance) provides discovery, registration, and delivery services for disk and server images. The service 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.

OpenStack Block Storage (cinder) manages block storage mounting and the presentation of such mounted block storage to instances. The backend physical storage can consist of local disks, or Fiber Channel, iSCSI, and NFS mounts attached to Compute nodes. In addition, Block Storage supports volume backups, and snapshots for temporary save and restore operations. Programmatic management is available via Block Storage's API.

Security Fix(es):

• A resource vulnerability in the OpenStack Compute (nova), Block Storage (cinder), and Image (glance) services was found in their use of qemu-img. An unprivileged user could consume as much as 4 GB of RAM on the compute host by uploading a malicious image. This flaw could lead possibly to host out-of-memory errors and negatively affect other running tenant instances.

oslo.concurrency has been updated to support process limits ('prlimit'), which is needed to fix this flaw. (CVE-2015-5162)

This issue was discovered by Richard W.M. Jones (Red Hat).

Bug Fix(es):

• qemu-img calls were unrestricted by ulimit. oslo.concurrency has been updated to add support for process limits ('prlimit'), which is needed to fix the CVE-2015-5162 security vulnerability. (BZ#1383415)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

Affected Products

• Red Hat OpenStack 7 x86_64

Fixes

• BZ - 1268303 - CVE-2015-5162 openstack-nova/glance/cinder: Malicious image may exhaust resources
• BZ - 1316791 - Instance was deleted successfully without detaching its volume, if nova-compute was killed during running "nova delete"
• BZ - 1349005 - cinder volume backup throws UnicodeDecodeError: 'ascii' and access denied
• BZ - 1365899 - Missing dependency of python-oslo-log and python-oslo-policy in openstack-cinder
• BZ - 1370598 - multipathd segfault during volume attach
• BZ - 1378906 - nova-scheduler fails to start because of the too big nova database
• BZ - 1380289 - [Backport] Block based migration doesn't work for instances that have a volume attached
• BZ - 1381533 - Multi-Ephemeral instance Live Block Migration fails silently
• BZ - 1383415 - [CVE-2015-5162] oslo.concurrency: Backport support for 'prlimit' parameter [OSP-7]
• BZ - 1386268 - NetApp Cinder driver: cloning operations are unsuccessful
• BZ - 1391970 - [tempest] test_delete_attached_volume fails in RHOS7
• BZ - 1394964 - Live migration with config-drive fails with InvalidSharedStorage error
• BZ - 1399760 - rbd snapshot delete fails if backend is missing file
• BZ - 1409820 - Creating Encrypted Volumes with Cinder(Ceph backend) gives false positive
• BZ - 1410046 - Multiple attempts made to delete iSCSI multipath path devices
• BZ - 1416884 - [7.0.z] nova creates an invalid ethernet/bridge interface definition in virsh xml
• BZ - 1420451 - revert Use stashed volume connector in _local_cleanup_bdm_volumes from openstack-nova-2015.1.4-28.el7ost

CVEs

• CVE-2015-5162

References

• https://access.redhat.com/security/updates/classification/#moderate