Bug 1066357 (CVE-2013-4531)

Summary:	CVE-2013-4531 qemu: target-arm/machine.c: fix buffer overflow 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, jrusnack, 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 11:32:03 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:	1095724, 1095725, 1095726
Bug Blocks:	1036654

Description Petr Matousek 2014-02-18 09:41:08 UTC

cpreg_vmstate_indexes is a VARRAY_INT32. A negative value for
cpreg_vmstate_array_len will cause a buffer overflow.

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=d2ef4b61fe6d33d2a5dcf100a9b9440de341ad62

Comment 1 Petr Matousek 2014-02-18 11:19:56 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 12:32:20 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1095724]

Comment 5 Fedora Update System 2014-05-16 09:59:47 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.