Bug 1525130 (CVE-2017-1002101)

Summary:	CVE-2017-1002101 kubernetes: Volume security can be sidestepped with innocent emptyDir and subpath
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	admiller, ahardin, aos-bugs, aos-storage-staff, bchilds, bleanhar, ccoleman, dbaker, dedgar, dmcphers, eparis, hchiramm, ichavero, jbrooks, jcajka, jchaloup, jgoulding, jkeck, jokerman, jshepherd, madam, mchappel, nhorman, rhs-bugs, security-response-team, sisharma, smunilla, ssaha, storage-qa-internal, tdawson, tstclair, vbatts, vbellur
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	It was found that volume security can be sidestepped with innocent emptyDir and subpath. This could give an attacker with access to a pod full control over the node host by gaining access to docker socket.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-07-12 13:04:33 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1519365, 1520626, 1520627, 1520631, 1554165, 1554166, 1554420, 1554569
Bug Blocks:	1525132

Description Andrej Nemec 2017-12-12 16:34:42 UTC

It was found that volume security can be sidestepped with innocent emptyDir and subpath. A pod could give full control over node host by gaining access to docker socket.

Comment 2 Kurt Seifried 2018-03-12 16:06:36 UTC

Created kubernetes tracking bugs for this issue:

Affects: fedora-all [bug 1554420]

Comment 3 errata-xmlrpc 2018-03-12 19:38:27 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 3.3
  Red Hat OpenShift Container Platform 3.4
  Red Hat OpenShift Container Platform 3.5
  Red Hat OpenShift Container Platform 3.6
  Red Hat OpenShift Container Platform 3.7

Via RHSA-2018:0475 https://access.redhat.com/errata/RHSA-2018:0475

Comment 4 Jason Shepherd 2018-03-12 22:17:39 UTC

This flaw allows a pod to mount any part of the host filesystem. The pod will run with the security contraints placed on the user but could read anything with o=rx mode and appropriate SELinux label.

Comment 5 Jason Shepherd 2018-03-12 22:29:39 UTC

External References:

https://github.com/kubernetes/kubernetes/issues/60813

Comment 7 Jason Shepherd 2018-03-13 00:17:56 UTC

Created origin tracking bugs for this issue:

Affects: fedora-all [bug 1554569]

Comment 10 Jason Shepherd 2018-03-14 01:11:10 UTC

Statement:

This flaw allows a pod to mount any part of the host filesystem. The pod will run with the security contraints placed on the user but could read anything with o=rx mode and appropriate SELinux label.

Comment 11 Cedric Buissart 2018-04-10 09:56:34 UTC

Kubernetes has been deprecated from Red Hat Enterprise Linux Extras channel. See https://access.redhat.com/errata/RHSA-2018:1072 for details.

Comment 12 Product Security DevOps Team 2019-07-12 13:04:33 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2017-1002101