Bug 1848951 (CVE-2020-14316) - CVE-2020-14316 kubevirt: VMIs can be used to access host files
Summary: CVE-2020-14316 kubevirt: VMIs can be used to access host files
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-14316
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1850033 1852303
Blocks: 1848931
TreeView+ depends on / blocked
 
Reported: 2020-06-19 11:02 UTC by Stoyan Nikolov
Modified: 2021-02-16 19:50 UTC (History)
9 users (show)

Fixed In Version: kubevirt 0.30
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in kubevirt 0.29 and earlier. Virtual Machine Instances (VMIs) can be used to gain access to the host's filesystem. Successful exploitation allows an attacker to assume the privileges of the VM process on the host system. In worst-case scenarios an attacker can read and modify any file on the system where the VMI is running. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2020-07-28 19:28:03 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:3194 0 None None None 2020-07-28 19:07:34 UTC

Description Stoyan Nikolov 2020-06-19 11:02:12 UTC 
Virtual Machine Instances (VMIs) can be used to gain access to the host's filesystem.
Upstream fix: https://github.com/kubevirt/kubevirt/pull/3686
Comment 4 Stoyan Nikolov 2020-07-06 07:09:48 UTC 
Acknowledgments:

Name: Fabian Deutsch (Red Hat)
Comment 9 errata-xmlrpc 2020-07-28 19:07:32 UTC 
This issue has been addressed in the following products:

  RHEL-8-CNV-2.4
  RHEL-7-CNV-2.4

Via RHSA-2020:3194 https://access.redhat.com/errata/RHSA-2020:3194
Comment 10 Product Security DevOps Team 2020-07-28 19:28:03 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-2020-14316
Comment 15 Stoyan Nikolov 2020-07-30 08:03:25 UTC 
Mitigation:

This flaw can be partially or completely mitigated by leveraging existing mechanisms to restrict the VMI process such as running as non-root and using SELinux and sVirt whenever possible.
Comment 17 Stoyan Nikolov 2020-07-30 08:20:36 UTC 
Statement:

OpenShift Virtualization 1.4 and 2.3 use affected version of kubevirt in virt-launcher container, however impact is rated Moderate as VMIs are running as non-root and thus have limited access to the host's filesystem.
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