Bug 1668022 (CVE-2019-8934)

Summary:	CVE-2019-8934 QEMU: ppc64: sPAPR emulator leaks the host hardware identity
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ailan, amit, areis, berrange, cfergeau, dgibson, drjones, dwmw2, imammedo, itamar, jen, jforbes, jjoyce, jschluet, knoel, lhh, lpeer, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, ppandit, rbalakri, rjones, robinlee.sysu, sclewis, security-response-team, slinaber, 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:	2021-10-27 10:54:53 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:	1679459, 1679460, 1679461, 1679463, 1679464, 1679465, 1679822, 1679823, 1679824, 1793215
Bug Blocks:	1668024

Description Laura Pardo 2019-01-21 17:40:34 UTC

It was found that the KVM PPC64 emulator for the sPAPR machine leaks the host
hardware identity to all running guests. The sPAPAR(hw/ppc/spapr.c) emulator
populates the device tree for the guest with two fields "host-serial"
and "host-model". The values for these fields are taken via hypervisor from
the host device tree data exposed in "/proc/device-tree/system-id"
and "/proc/device-tree/model" file respectively.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2019-02/msg04821.html

Reference:
----------
  -> https://www.openwall.com/lists/oss-security/2019/02/21/1

Comment 1 Laura Pardo 2019-01-21 20:14:23 UTC

Acknowledgments:

Name: Daniel P. Berrangé (Red Hat)

Comment 4 Prasad Pandit 2019-02-21 08:03:36 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1679463]