Bug 1519231 (CVE-2017-17051)

Summary:	CVE-2017-17051 openstack-nova: Nova FilterScheduler doubles resource allocations during rebuild with new image
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	apevec, berrange, chrisw, dasmith, eglynn, jjoyce, jschluet, kbasil, kchamart, lhh, lpeer, markmc, mburns, nlevinki, rbryant, sbauza, sclewis, security-response-team, sferdjao, sgordon, slinaber, srevivo, tdecacqu, vromanso
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Last Closed:	2017-12-07 05:32:37 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Bug Blocks:	1508541

Description Andrej Nemec 2017-11-30 13:14:27 UTC

It was found that 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. 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.

Bug report:

https://launchpad.net/bugs/1732976

Comment 1 Andrej Nemec 2017-11-30 13:14:30 UTC

Acknowledgments:

Name: the OpenStack project
Upstream: Matt Riedemann (Huawei)

Comment 2 Joshua Padman 2017-12-07 05:32:41 UTC

Statement:

This vulnerability was caused by the fix for a prior vulnerability (CVE-2017-16239). No patches for the earlier vulnerability were released for Red Hat OpenStack before the discover of the new vulnerability. Therefore, current versions of Red Hat OpenStack are not affected by this vulnerability.