Bug 1530360 (CVE-2017-18030)

Summary:	CVE-2017-18030 Qemu: Out-of-bounds access in cirrus_invalidate_region routine
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
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, berrange, cfergeau, chrisw, drjones, dwmw2, imammedo, itamar, jen, jforbes, jjoyce, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, ppandit, rbalakri, rbryant, rjones, rkrcmar, robinlee.sysu, sclewis, security-response-team, slinaber, 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:	2018-01-16 10:13:16 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:	1534673
Bug Blocks:	1530362

Description Pedro Sampaio 2018-01-02 18:32:14 UTC

Quick emulator(Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is
vulnerable to an out-of-bounds access issue. It could occur while refreshing vnc surface area, in case the initial pitch was negative in cirrus_invalidate_region.

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

Upstream patch:
---------------
  -> https://git.qemu.org/?p=qemu.git;a=commitdiff;h=f153b563f8cf121aebf5a2fff5f0110faf58ccb3

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2018/01/15/3

Comment 2 Prasad Pandit 2018-01-15 17:36:46 UTC

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1534673]