Bug 1376776 (CVE-2016-7423)

Summary:	CVE-2016-7423 Qemu: scsi: mptsas: OOB access when freeing MPTSASRequest object
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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, slong, 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:	A flaw was found in the Quick Emulator(QEMU) built with LSI SAS1068 Host Bus emulation support, where it is vulnerable to an invalid memory-access issue. The flaw could occur while processing SCSI IO requests in the mptsas_process_scsi_io_request routine. A privileged user inside the guest could use this flaw to crash the QEMU-process instance on the host (denial of service).	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:58:46 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:	1376777
Bug Blocks:	1365400

Description Prasad Pandit 2016-09-16 11:37:38 UTC

Quick emulator(Qemu) built with the LSI SAS1068 Host Bus emulation support,
is vulnerable to an invalid memory access issue. It could occur while
processing scsi io requests in mptsas_process_scsi_io_request.

A privileged user inside guest 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/2016-09/msg03604.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/09/16/5

Comment 1 Prasad Pandit 2016-09-16 11:37:43 UTC

Acknowledgments:

Name: Li Qiang (360.cn Inc.)

Comment 2 Prasad Pandit 2016-09-16 11:38:44 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1376777]