Bug 1520782 (CVE-2017-17381)

Summary:	CVE-2017-17381 Qemu: virtio: divide by zero exception while updating rings
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ailan, amit, areis, berrange, cfergeau, drjones, dwmw2, imammedo, itamar, jen, jforbes, knoel, m.a.young, mkenneth, mrezanin, mst, pbonzini, rjones, rkrcmar, robinlee.sysu, 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 03:32:41 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:	1520784, 1520785
Bug Blocks:	1516119

Description Prasad Pandit 2017-12-05 07:18:28 UTC

Virtio Vring implementation in Quick Emulator(QEMU) is vulnerable
to an arithmetic exception issue. It could occur if a guest was
to unset vring alignment while updating Virtio rings.

A guest user/process could use this flaw to crash Qemu process
resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-12/msg00166.html

Comment 2 Prasad Pandit 2017-12-05 07:20:30 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1520785]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1520784]

Comment 3 Prasad Pandit 2017-12-06 11:28:42 UTC

Acknowledgments:

Name: Huawei IT Network Security Alpha Lab, Dengzhan Heyuandong Bijunhua and Liweichao (Huawei Inc.)