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Bug 1519231 - (CVE-2017-17051) CVE-2017-17051 openstack-nova: Nova FilterScheduler doubles resource allocations during rebuild with new image
CVE-2017-17051 openstack-nova: Nova FilterScheduler doubles resource allocati...
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20171205,repor...
: Security
Depends On:
Blocks: 1508541
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Reported: 2017-11-30 08:14 EST by Andrej Nemec
Modified: 2017-12-07 00:32 EST (History)
24 users (show)

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Last Closed: 2017-12-07 00:32:37 EST
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Description Andrej Nemec 2017-11-30 08:14:27 EST 
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 08:14:30 EST 
Acknowledgments:

Name: the OpenStack project
Upstream: Matt Riedemann (Huawei)
Comment 2 Joshua Padman 2017-12-07 00:32:41 EST 
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.
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