Bug 1066337 - (CVE-2013-4149) CVE-2013-4149 qemu: virtio-net: out-of-bounds buffer write on load
CVE-2013-4149 qemu: virtio-net: out-of-bounds buffer write on load
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=20131203,repor...
: Reopened, Security
Depends On: 1095683 1095684 1095685 1133850
Blocks: 1036654 1133827
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Reported: 2014-02-18 04:20 EST by Petr Matousek
Modified: 2016-04-26 12:38 EDT (History)
40 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2014-09-22 00:56:27 EDT
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RHEL 7.3 requirements from Atomic Host:


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Description Petr Matousek 2014-02-18 04:20:27 EST
Michael S. Tsirkin writes:

QEMU 1.3.0 out-of-bounds buffer write in virtio_net_load()@hw/net/virtio-net.c

>         } else if (n->mac_table.in_use) {
>             uint8_t *buf = g_malloc0(n->mac_table.in_use);

We are allocating buffer of size n->mac_table.in_use

>             qemu_get_buffer(f, buf, n->mac_table.in_use * ETH_ALEN);

and read to the n->mac_table.in_use size buffer n->mac_table.in_use *
ETH_ALEN bytes, corrupting memory.

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=98f93ddd84800f207889491e0b5d851386b459cf
Comment 1 Petr Matousek 2014-02-18 06:02:37 EST
Statement:

This issue does not affect the versions of kvm package as shipped with
Red Hat Enterprise Linux 5.

This issue does not affect the versions of qemu-kvm package as shipped
with Red Hat Enterprise Linux 6.
Comment 3 Prasad J Pandit 2014-05-08 07:51:20 EDT
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1095683]
Comment 4 Fedora Update System 2014-05-16 06:01:23 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 5 Prasad J Pandit 2014-07-18 09:37:02 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 6 errata-xmlrpc 2014-07-23 12:15:32 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 9 errata-xmlrpc 2014-09-22 00:01:02 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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