Bug 1374702 (CVE-2016-7170)

Summary:	CVE-2016-7170 Qemu: vmware_vga: OOB stack memory access when processing svga command
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ailan, amaris, amit.shah, aortega, apevec, areis, armbru, ayoung, berrange, cfergeau, chrisw, cvsbot-xmlrpc, drjones, dwmw2, imammedo, itamar, jen, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mkenneth, mrezanin, mst, pbonzini, ppandit, rbalakri, rbryant, rjones, rkrcmar, sclewis, srevivo, tdecacqu, virt-maint, virt-maint, vkuznets, xen-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	Quick Emulator (QEMU) built with the VMware-SVGA chipset emulation support is vulnerable to an OOB stack memory write issue. It could occur while processing VGA commands in 'vmsvga_fifo_run' routine. A privileged user inside guest could use this flaw to crash the QEMU process resulting in DoS.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-12-09 09:00:57 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:	1374709, 1398112, 1398113, 1398114, 1398115, 1398117, 1398118, 1398119, 1398120, 1398121, 1398122, 1398123, 1398124
Bug Blocks:	1329196, 1348571, 1370384

Description Prasad Pandit 2016-09-09 13:01:55 UTC

Quick Emulator(Qemu) built with the VMware-SVGA "chipset" emulation support
is vulnerable to an OOB stack memory write issue. It could occur while
processing VGA commands in 'vmsvga_fifo_run' routine.

A privileged user inside guest could use this flaw to crash the Qemu process
resulting in DoS.

Upstream fix:
-------------
  -> git.qemu.org/?p=qemu.git;a=commit;h=167d97a3def77ee2dbf6e908b0ecbfe2103977db

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/09/09/7

Comment 1 Prasad Pandit 2016-09-09 13:02:31 UTC

Acknowledgments:

Name: Qinghao Tang, Li Qiang (360.cn Inc.)

Comment 2 Prasad Pandit 2016-09-09 13:04:16 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1374709]

Comment 12 Prasad Pandit 2017-01-12 18:18:43 UTC

*** Bug 1329193 has been marked as a duplicate of this bug. ***