Bug 1526029 (CVE-2018-18954)

Summary:	CVE-2018-18954 QEMU: ppc64: Out-of-bounds r/w stack access in pnv_lpc_do_eccb
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, jpadman, 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, tonyb, 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 03:34:19 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:	1647164, 1647166
Bug Blocks:	1526038

Description Pedro Sampaio 2017-12-14 16:23:59 UTC

An OOB r/w buffer access issue was found in the PowerPC PowerNV LPC controller
in 'pnv_lpc_do_eccb' routine. It could occur while performing a memory write operation. A guest user/process could use this flaw to crash the QEMU process resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg00446.html

Reference:
----------
  -> https://www.openwall.com/lists/oss-security/2018/11/06/6

Comment 3 Joshua Padman 2018-07-12 05:22:51 UTC

PowerNV is not included or supported in the QEMU provided with OpenStack.

Comment 4 Joshua Padman 2018-11-05 09:26:32 UTC

Acknowledgments:

Name: moguofang

Comment 5 Prasad Pandit 2018-11-06 19:06:00 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1647164]