Bug 1714434 (CVE-2019-10147) - CVE-2019-10147 rkt: processes run with `rkt enter` are not limited by cgroups during stage 2
Summary: CVE-2019-10147 rkt: processes run with `rkt enter` are not limited by cgroups...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2019-10147
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1715685
Blocks: 1711908
TreeView+ depends on / blocked
 
Reported: 2019-05-28 06:33 UTC by Sam Fowler
Modified: 2021-02-16 21:54 UTC (History)
4 users (show)

Fixed In Version:
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Doc Text:
A flaw was found where rkt does not isolate processes in containers that are run with `rkt enter`. Processes run with `rkt enter` are not limited by cgroups during stage 2 (the actual environment in which the applications run). Compromised containers could exploit this flaw to access host resources.
Clone Of:
Environment:
Last Closed: 2019-06-10 10:56:13 UTC
Embargoed:

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Description Sam Fowler 2019-05-28 06:33:13 UTC 
Processes spawned by the ‘rkt enter’ command run with are not limited by cgroups during stage 2 ((the actual environment in which the applications run). Such processes could consume host resources to cause a denial of service.


Reference:

https://coreos.com/rkt/docs/latest/devel/architecture.html#stage-2
Comment 1 Sam Fowler 2019-05-28 06:37:21 UTC 
Acknowledgments:

Name: Yuval Avrahami (Twistlock)
Comment 2 Sam Fowler 2019-05-31 01:06:33 UTC 
Created rkt tracking bugs for this issue:

Affects: fedora-all [bug 1715685]
Comment 3 Sam Fowler 2019-05-31 01:07:32 UTC 
External Reference:

https://www.twistlock.com/labs-blog/breaking-out-of-coresos-rkt-3-new-cves/
Comment 4 Product Security DevOps Team 2019-06-10 10:56:13 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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