Bug 1066393 - (CVE-2013-4538) CVE-2013-4538 qemu: ssd0323: fix buffer overun on invalid state load
CVE-2013-4538 qemu: ssd0323: fix buffer overun on invalid state load
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: 1095756 1095758 1095759
Blocks: 1036654
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Reported: 2014-02-18 05:20 EST by Petr Matousek
Modified: 2014-09-22 07:33 EDT (History)
25 users (show)

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Doc Type: Bug Fix
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Last Closed: 2014-09-22 07:28:25 EDT
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Description Petr Matousek 2014-02-18 05:20:46 EST
s->cmd_len used as index in ssd0323_transfer() to store 32-bit field.
Possible this field might then be supplied by guest to overwrite a
return addr somewhere. Same for row/col fields, which are indicies into
framebuffer array.

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=ead7a57df37d2187813a121308213f41591bd811
Comment 1 Petr Matousek 2014-02-18 06:35:45 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 Fedora Update System 2014-05-16 05:58:51 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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