Bug 1088986 - (CVE-2014-0182) CVE-2014-0182 qemu: virtio: out-of-bounds buffer write on state load with invalid config_len
CVE-2014-0182 qemu: virtio: out-of-bounds buffer write on state load with inv...
Status: CLOSED ERRATA
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=20140417,repor...
: Security
Depends On: 1095779 1095780 1095781 1095782 1095783 1102579 1102580 1110194 1110284 1110288 1133850
Blocks: 1036654 1110626 1133827
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Reported: 2014-04-17 11:00 EDT by Petr Matousek
Modified: 2016-04-27 00:29 EDT (History)
42 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Clone Of:
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Last Closed: 2014-09-22 07:09:50 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Petr Matousek 2014-04-17 11:00:55 EDT
config_len is read during state load and later used as size argument
when initializing vdev->config as follows:

hw/virtio/virtio.c: virtio_load()

    vdev->config_len = qemu_get_be32(f);
    qemu_get_buffer(f, vdev->config, vdev->config_len);


An user able to alter the savevm data (either on the disk or over the wire
during migration) could use this flaw to to corrupt QEMU process memory on
the (destination) host, which could potentially result in arbitrary code
execution on the host with the privileges of the QEMU process.

Upstream fix:
-------------
  -> http://git.qemu.org/?p=qemu.git;a=commit;h=a890a2f9137ac3cf5b607649e66a6f3a5512d8dc
Comment 1 Petr Matousek 2014-04-17 11:01:48 EDT
Statement:

This issue does affect the versions of kvm package as shipped with
Red Hat Enterprise Linux 5.

This issue does affect the versions of qemu-kvm package as shipped with
Red Hat Enterprise Linux 7.
Comment 3 Prasad J Pandit 2014-05-08 09:51:42 EDT
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1095781]
Comment 4 Fedora Update System 2014-05-16 05:58:06 EDT
qemu-1.6.2-5.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 6 errata-xmlrpc 2014-06-09 10:37:53 EDT
This issue has been addressed in following products:

  RHEV-H and Agents for RHEL-6

Via RHSA-2014:0674 https://rhn.redhat.com/errata/RHSA-2014-0674.html
Comment 7 Murray McAllister 2014-06-10 03:56:51 EDT
Acknowledgements:

The issues were discovered as part of the state loading code audit performed by Michael S. Tsirkin of Red Hat, Anthony Liguori and Michael Roth.
Comment 8 errata-xmlrpc 2014-06-10 16:19:30 EDT
This issue has been addressed in following products:

  RHEV-H and Agents for RHEL-6

Via RHSA-2014:0744 https://rhn.redhat.com/errata/RHSA-2014-0744.html
Comment 9 errata-xmlrpc 2014-06-10 16:20:26 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:0743 https://rhn.redhat.com/errata/RHSA-2014-0743.html
Comment 13 Dr. David Alan Gilbert 2014-06-30 06:19:53 EDT
Please note that this fix causes a regression (see bz 1113009) which has a fix on that bz.
Comment 14 errata-xmlrpc 2014-07-23 12:16:21 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:0927 https://rhn.redhat.com/errata/RHSA-2014-0927.html
Comment 16 errata-xmlrpc 2014-07-24 11:39:26 EDT
This issue has been addressed in following products:

  OpenStack 4 for RHEL 6
  OpenStack 3 for RHEL 6

Via RHSA-2014:0888 https://rhn.redhat.com/errata/RHSA-2014-0888.html
Comment 18 errata-xmlrpc 2014-09-22 00:01:51 EDT
This issue has been addressed in the following products:

  OpenStack 5 for RHEL 7

Via RHSA-2014:1268 https://rhn.redhat.com/errata/RHSA-2014-1268.html

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