Bug 1418342 (CVE-2017-5856)

Summary:	CVE-2017-5856 Qemu: scsi: megasas: host memory leakage in megasas_handle_dcmd
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, 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 03:06:45 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:	1418344
Bug Blocks:	1364375

Description Prasad Pandit 2017-02-01 15:29:49 UTC

Quick Emulator(Qemu) built with the MegaRAID SAS 8708EM2 Host Bus Adapter
emulation support is vulnerable to a memory leakage issue. It could occur
while processing MegaRAID Firmware Interface(MFI) command in
'megasas_handle_dcmd' routine.

A privileged user inside guest could use this flaw to leak host memory
resulting DoS issue.

Upstream patch:
---------------
  -> http://git.qemu.org/?p=qemu.git;a=commit;h=765a707000e838c30b18d712fe6cb3dd8e0435f3

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/02/01/19

Comment 1 Prasad Pandit 2017-02-01 15:30:24 UTC

Acknowledgments:

Name: Li Qiang (360.cn Inc.)

Comment 2 Prasad Pandit 2017-02-01 15:32:26 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1418344]