HIGH8.6
PYSEC-2026-692
OpenStack Nova DoS by rebuilding the same instance with a new image multiple times
Quick fix
PYSEC-2026-692 — nova: upgrade to the fixed version with the command below.
pip install --upgrade 'nova>=16.0.4'Details
An issue was discovered in the default FilterScheduler in OpenStack Nova 16.0.3. By repeatedly rebuilding an instance with new images, an authenticated user may consume untracked resources on a hypervisor host leading to a denial of service, aka doubled resource allocations. This regression was introduced with the fix for OSSA-2017-005 (CVE-2017-16239); however, only Nova stable/pike or later deployments with that fix applied and relying on the default FilterScheduler are affected.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://nvd.nist.gov/vuln/detail/CVE-2017-17051[ADVISORY]
- https://github.com/openstack/nova/commit/25a1d78e83065c5bea5d8e0a017fd9d0914d41d9[WEB]
- https://github.com/openstack/nova/commit/fed660c1189fdf4159d97badfdc8c5b35ad14f23[WEB]
- https://github.com/openstack/nova[PACKAGE]
- https://launchpad.net/bugs/1732976[WEB]
- https://review.openstack.org/521662[WEB]
- https://review.openstack.org/523214[WEB]
- https://security.openstack.org/ossa/OSSA-2017-006.html[WEB]
- http://www.securityfocus.com/bid/102102[WEB]
- https://pypi.org/project/nova[PACKAGE]
- https://github.com/advisories/GHSA-vq76-rxx3-4r4r[ADVISORY]