Bug 1066405 - (CVE-2013-4534) CVE-2013-4534 qemu: openpic: buffer overrun on incoming migration
CVE-2013-4534 qemu: openpic: buffer overrun on incoming migration
Status: CLOSED NOTABUG
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...
: Security
Depends On: 1095770 1095771 1095772
Blocks: 1036654
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Reported: 2014-02-18 05:25 EST by Petr Matousek
Modified: 2014-06-10 08:09 EDT (History)
26 users (show)

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Doc Type: Bug Fix
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Last Closed: 2014-06-10 08:09:22 EDT
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Description Petr Matousek 2014-02-18 05:25:25 EST
opp->nb_cpus is read from the wire and used to determine how many
IRQDest elements to read into opp->dst[]. If the value exceeds the
length of opp->dst[], MAX_CPU, opp->dst[] can be overrun with arbitrary
data from the wire.

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:
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  -> http://git.qemu.org/?p=qemu.git;a=commit;h=73d963c0a75cb99c6aaa3f6f25e427aa0b35a02e
Comment 1 Petr Matousek 2014-02-18 06:42:40 EST
Statement:

Not vulnerable.

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 09:38:01 EDT
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1095770]
Comment 4 Fedora Update System 2014-05-16 05:58:17 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.

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