Bug 1032210 - (CVE-2013-6368) CVE-2013-6368 kvm: cross page vapic_addr access
CVE-2013-6368 kvm: cross page vapic_addr access
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20131212,repo...
: Security
Depends On: 1032214 1032215 1032219 1032220 1042090 1042092 1053191
Blocks: 1030995
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Reported: 2013-11-19 12:38 EST by Petr Matousek
Modified: 2015-10-15 14:05 EDT (History)
21 users (show)

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Doc Type: Bug Fix
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Last Closed: 2014-02-12 14:02:28 EST
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Description Petr Matousek 2013-11-19 12:38:48 EST
In kvm_lapic_sync_from_vapic and kvm_lapic_sync_to_vapic there is the potential to corrupt kernel memory if userspace provides vapic_addr address that is at the end of a page.

An unprivileged local user could use this flaw to crash the system or, potentially, escalate their privileges on the system.

Acknowledgements:

Red Hat would like to thank Andrew Honig of Google for reporting this issue
Comment 1 Petr Matousek 2013-11-19 12:44:29 EST
Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise MRG 2 as they did not provide support for the KVM subsystem.
Comment 5 errata-xmlrpc 2013-12-12 14:26:10 EST
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2013:1801 https://rhn.redhat.com/errata/RHSA-2013-1801.html
Comment 7 Petr Matousek 2013-12-12 15:55:09 EST
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1042090]
Comment 8 Fedora Update System 2013-12-20 21:14:28 EST
kernel-3.12.5-200.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 9 Fedora Update System 2013-12-20 21:24:15 EST
kernel-3.12.5-302.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 11 errata-xmlrpc 2014-02-12 13:25:13 EST
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2014:0163 https://rhn.redhat.com/errata/RHSA-2014-0163.html
Comment 12 errata-xmlrpc 2014-03-11 13:08:28 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6.4 EUS - Server and Compute Node Only

Via RHSA-2014:0284 https://rhn.redhat.com/errata/RHSA-2014-0284.html

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