Bug 1384909 (CVE-2016-8669)

Summary:	CVE-2016-8669 Qemu: char: divide by zero error in serial_update_parameters
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ailan, amit.shah, apevec, areis, ayoung, berrange, cfergeau, chrisw, crobinso, cvsbot-xmlrpc, drjones, dwmw2, imammedo, itamar, jen, jjoyce, 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 03:00:13 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:	1384910, 1384911, 1476049, 1476068, 1476069, 1476072, 1476074, 1476077
Bug Blocks:	1384776, 1476084

Description Prasad Pandit 2016-10-14 11:01:30 UTC

Quick Emulator(Qemu) built with the 16550A UART emulation support is vulnerable
to a divide by zero issue. It could occur while updating serial device
parameters in 'serial_update_parameters'.

A privileged guest user could use this flaw to crash the Qemu process instance
on the host, resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02461.html

Comment 1 Prasad Pandit 2016-10-14 11:02:06 UTC

Acknowledgments:

Name: PSIRT  (Huawei Inc.)

Comment 2 Prasad Pandit 2016-10-14 11:03:22 UTC

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1384910]

Comment 3 Prasad Pandit 2016-10-14 11:03:46 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1384911]

Comment 4 Andrej Nemec 2016-10-17 07:48:50 UTC

CVE assignment:

http://seclists.org/oss-sec/2016/q4/137

Comment 5 Cole Robinson 2017-01-16 18:22:34 UTC

commit 3592fe0c919cf27a81d8e9f9b4f269553418bb01
Author: Prasad J Pandit <pjp>
Date:   Wed Oct 12 11:28:08 2016 +0530

    char: serial: check divider value against baud base

Comment 6 errata-xmlrpc 2017-08-02 00:57:25 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 10.0 (Newton)
  Red Hat OpenStack Platform 11.0 (Ocata)
  Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7
  Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7
  Red Hat OpenStack Platform 8.0 (Liberty)
  Red Hat OpenStack Platform 9.0 (Mitaka)

Via RHSA-2017:2408 https://access.redhat.com/errata/RHSA-2017:2408

Comment 7 errata-xmlrpc 2017-08-02 04:46:14 UTC

This issue has been addressed in the following products:

  RHEV 4.X RHEV-H and Agents for RHEL-7

Via RHSA-2017:2392 https://access.redhat.com/errata/RHSA-2017:2392