Bug 1382668 (CVE-2016-7995)

Summary:	CVE-2016-7995 Qemu: usb: hcd-ehci: memory leak in ehci_process_itd
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ailan, amit.shah, apevec, areis, ayoung, berrange, cfergeau, chrisw, cvsbot-xmlrpc, drjones, dwmw2, imammedo, itamar, jen, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mkenneth, mrezanin, mst, pbonzini, 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:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:59:50 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:	1382669
Bug Blocks:	1382469

Description Prasad Pandit 2016-10-07 11:03:57 UTC

Qemu emulator(Qemu) built with the USB EHCI emulation support is vulnerable
to a memory leakage flaw. It could occur while processing isochronous transfer
descriptors(iTD), with buffer page select(PG) index that falls beyond buffer
page array area.

A privileged user inside guest could use this flaw to leak Qemu memory bytes
leading to a DoS on the host.

Upstream fix:
-------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg06609.html

Comment 1 Prasad Pandit 2016-10-07 11:04:28 UTC

Acknowledgments:

Name: Li Qiang (360.cn Inc.)

Comment 2 Prasad Pandit 2016-10-07 11:06:29 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1382669]