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Bug 1417812 - (CVE-2017-2596) CVE-2017-2596 Kernel: kvm: page reference leakage in handle_vmon
CVE-2017-2596 Kernel: kvm: page reference leakage in handle_vmon
Status: NEW
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=20170124,repor...
: Security
Depends On: 1417813 1417825 1417826
Blocks: 1416012
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Reported: 2017-01-31 02:19 EST by Prasad J Pandit
Modified: 2018-08-28 18:13 EDT (History)
32 users (show)

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Doc Text:
Linux kernel built with the KVM visualization support (CONFIG_KVM), with nested visualization(nVMX) feature enabled(nested=1), is vulnerable to host memory leakage issue. It could occur while emulating VMXON instruction in 'handle_vmon'. An L1 guest user could use this flaw to leak host memory potentially resulting in DoS.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1842 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2017-08-01 14:22:09 EDT
Red Hat Product Errata RHSA-2017:2077 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 14:13:37 EDT

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Description Prasad J Pandit 2017-01-31 02:19:29 EST 
Linux kernel built with the KVM virtualisation support(CONFIG_KVM), with
nested virtualisation(nVMX) feature enabled(nested=1), is vulnerable to host
memory leakage issue. It could occur while emulating VMXON instruction in
'handle_vmon'.

A L1 guest user could use this flaw to leak host memory potentially resulting
in DoS.

Upstream patch
--------------
  -> https://www.spinics.net/lists/kvm/msg144319.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/01/31/4
Comment 1 Prasad J Pandit 2017-01-31 02:19:34 EST 
Acknowledgments:

Name: Dmitry Vyukov (Google Inc.)
Comment 2 Prasad J Pandit 2017-01-31 02:20:34 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1417813]
Comment 5 Prasad J Pandit 2017-01-31 03:03:45 EST 
Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Comment 6 Fedora Update System 2017-02-06 19:53:44 EST 
kernel-4.9.7-101.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 7 errata-xmlrpc 2017-08-01 15:12:26 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077
Comment 8 errata-xmlrpc 2017-08-02 03:52:35 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842
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