Bug 1299455

Summary:	Qemu: usb ehci out-of-bounds read in ehci_process_itd
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abaron, alonbl, aortega, apevec, areis, ayoung, bmcclain, chrisw, dallan, dblechte, gklein, gkotton, jen, jrusnack, jschluet, knoel, lhh, lpeer, markmc, mgoldboi, michal.skrivanek, mkenneth, mrezanin, mst, osoukup, pbonzini, ppandit, rbalakri, rbryant, sclewis, security-response-team, sherold, tdecacqu, yeylon, ykaul, ylavi
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:	2016-01-20 17:00:18 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:	1300234, 1300235
Bug Blocks:	1299461

Description Adam Mariš 2016-01-18 12:18:54 UTC

Qemu emulator built with the USB EHCI emulation support is vulnerable to an information 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.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg03604.html

Comment 3 Prasad Pandit 2016-01-20 10:20:44 UTC

Statement: 

This issue does not affect the versions of the kvm and xen packages as shipped with Red Hat Enterprise Linux 5.

This issue affects the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6, and the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.

This issue affects the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 7 and the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.

This has been rated as having Low security impact and is not currently
planned to be addressed in future updates. For additional information, refer
to the Red Hat Enterprise Linux Life Cycle:
https://access.redhat.com/support/policy/updates/errata/.

Comment 4 Prasad Pandit 2016-01-20 10:25:21 UTC

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1300235]

Comment 5 Prasad Pandit 2016-01-20 10:25:36 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1300234]

Comment 6 Prasad Pandit 2016-01-20 17:00:18 UTC

-> https://bugzilla.redhat.com/show_bug.cgi?id=1299461#c5

Comment 7 Fedora Update System 2016-02-21 12:57:50 UTC

qemu-2.4.1-7.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2016-02-21 16:18:26 UTC

qemu-2.4.1-7.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2016-02-21 16:24:31 UTC

qemu-2.4.1-7.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 10 Fedora Update System 2016-02-25 08:50:57 UTC

qemu-2.3.1-12.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 11 Fedora Update System 2016-03-19 21:22:49 UTC

xen-4.5.2-9.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 12 Fedora Update System 2016-03-20 02:26:42 UTC

xen-4.5.2-9.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.