Bug 1066345 (CVE-2013-4526)

Summary:	CVE-2013-4526 qemu: ahci: fix buffer overrun on invalid state load
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amit.shah, areis, berrange, bsarathy, cfergeau, dwmw2, ehabkost, gleb, itamar, jkurik, juzhang, knoel, minovotn, mkenneth, mst, mtosatti, pbonzini, pfrields, ppandit, rbalakri, rhod, rjones, scottt.tw, virt-maint, virt-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-09-22 11:32:59 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1095696, 1095697, 1095698
Bug Blocks:	1036654

Description Petr Matousek 2014-02-18 09:30:55 UTC

Within hw/ide/ahci.c, VARRAY refers to ports which is also loaded.  So
we use the old version of ports to read the array but then allow any
value for ports.

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=ae2158ad6ce0845b2fae2a22aa7f19c0d7a71ce5

Comment 1 Petr Matousek 2014-02-18 11:11:07 UTC

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 Pandit 2014-05-08 12:17:38 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1095696]

Comment 4 Fedora Update System 2014-05-16 10:00:47 UTC

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.