Bug 1264929 (CVE-2015-8743)

Summary:	CVE-2015-8743 Qemu: net: ne2000: OOB memory access in ioport r/w functions
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abaron, ailan, aortega, apevec, areis, ayoung, carnil, chrisw, dallan, drjones, gkotton, gmollett, jen, jschluet, knoel, lhh, lpeer, markmc, mkenneth, mrezanin, mst, osoukup, pbonzini, ppandit, rbalakri, rbryant, rkrcmar, sclewis, security-response-team, slong, tdecacqu, vkuznets, yeylon
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	An out-of-bounds read-write access flaw was found in the QEMU emulator built with NE2000-device emulation support. The flaw occurred while performing 'ioport' read-write operations. A privileged (CAP_SYS_RAWIO) user or process could exploit the flaw to leak or corrupt QEMU memory bytes.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-01-07 05:08:49 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:	1294787, 1294788
Bug Blocks:	1264934

Description Adam Mariš 2015-09-21 16:54:22 UTC

Qemu emulator built with the NE2000 device emulation support is vulnerable to an
OOB r/w access issue. It could occur while performing 'ioport' r/w operations.

A privileged(CAP_SYS_RAWIO) user/process could use this flaw to leak or corrupt
Qemu memory bytes(3).

Upstream fix:
-------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg00050.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/01/04/2

Comment 2 Prasad Pandit 2015-12-30 10:18:57 UTC

Statement: 

This issue affects 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 does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 7.

This issue does not affect 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 2015-12-30 10:27:28 UTC

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1294788]

Comment 5 Prasad Pandit 2015-12-30 10:27:42 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1294787]

Comment 6 Fedora Update System 2016-01-24 03:26:52 UTC

qemu-2.4.1-6.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2016-01-28 18:26:05 UTC

xen-4.5.2-7.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 2016-02-01 06:31:05 UTC

xen-4.5.2-7.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2016-02-02 00:52:34 UTC

qemu-2.3.1-11.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.