Bug 1644973 (CVE-2018-18849)

Summary:	CVE-2018-18849 QEMU: lsi53c895a: OOB msg buffer access leads to DoS
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, apevec, areis, berrange, cfergeau, chrisw, drjones, dwmw2, imammedo, itamar, jen, jforbes, jjoyce, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, rbryant, rjones, rkrcmar, robinlee.sysu, sclewis, slinaber, 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:	2019-06-10 10:41:26 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:	1644977, 1644978
Bug Blocks:	1623665

Description Prasad Pandit 2018-11-01 06:03:05 UTC

An out of bounds memory access issue was found in the LSI53C895A SCSI Host Bus Adapter emulation while writing a message in lsi_do_msgin. It could occur during migration if the 'msg_len' field has an invalid value.  A user/process could use this flaw to crash the Qemu process resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg06682.html

Reference:
----------
  -> https://www.openwall.com/lists/oss-security/2018/11/01/1

Comment 1 Prasad Pandit 2018-11-01 06:03:30 UTC

Acknowledgments:

Name: Deja vu Security (dejavusecurity.com)

Comment 2 Prasad Pandit 2018-11-01 06:31:31 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1644977]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1644978]