Bug 1459477 (CVE-2017-9503)

Summary:	CVE-2017-9503 Qemu: scsi: megasas: null pointer dereference while processing megasas command
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, apevec, areis, ayoung, berrange, cfergeau, chrisw, cvsbot-xmlrpc, ddepaula, drjones, dwmw2, imammedo, itamar, jen, jjoyce, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mkenneth, mrezanin, mst, pbonzini, rbryant, rjones, rkrcmar, robinlee.sysu, 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 03:14:48 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:	1459478
Bug Blocks:	1449494

Description Prasad Pandit 2017-06-07 09:15:24 UTC

Quick Emulator(Qemu) built with the MegaRAID SAS 8708EM2 Host Bus Adapter
emulation support is vulnerable to a null pointer dereference issue. It
could occur while processing megasas commands via megasas_command_complete().

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

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-06/msg01313.html
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-06/msg01309.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/06/08/1

Comment 1 Prasad Pandit 2017-06-07 09:16:03 UTC

Acknowledgments:

Name: Zhangyanyu

Comment 2 Prasad Pandit 2017-06-07 09:17:06 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1459478]

Comment 3 Paolo Bonzini 2017-06-07 17:55:37 UTC

Patches at https://lists.gnu.org/archive/html/qemu-devel/2017-06/msg01308.html