RHSA-2018:0314 - Security Advisory

Topic

An update for openstack-nova is now available for Red Hat OpenStack Platform 11.0 (Ocata).

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

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.

Security Fix(es):

• By rebuilding an instance using a new image, an authenticated user may be able to circumvent the Filter Scheduler, bypassing imposed filters (for example, the ImagePropertiesFilter or the IsolatedHostsFilter). (CVE-2017-16239)

Red Hat would like to thank the OpenStack project for reporting this issue. Upstream acknowledges George Shuklin (Servers.com) as the original reporter.

Bug Fix(es):

• A recent update caused OpenStack Compute to ignore the disk cache mode configuration. This caused I/O performance degradation in instances. This fix corrects how OpenStack Compute configures disk caching. Instances no longer suffer performance degradation. (BZ#1508647)

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 11 x86_64

Fixes

• BZ - 1508539 - CVE-2017-16239 openstack-nova: Nova Filter Scheduler bypass through rebuild action
• BZ - 1511153 - Rebase openstack-nova to fe8acf0
• BZ - 1527643 - Unable to resize nova instance after upgrade to OSP 10
• BZ - 1528453 - Rebase openstack-nova to bbfc423
• BZ - 1530365 - dist-git not in sync with patches branch
• BZ - 1533164 - migration with block migration fails as disk_available_least is negative
• BZ - 1537045 - Bug in log output in hardware.py "Not enough available memory to schedule instance" prints full memory instead of available memory

CVEs

• CVE-2017-16239

References

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