Bug 1499110 (CVE-2017-15038)

Summary:	CVE-2017-15038 Qemu: 9p: virtfs: information disclosure when reading extended attributes
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
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, rbryant, rjones, rkrcmar, robinlee.sysu, sclewis, 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:	2019-06-08 03:26:38 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:	1499111
Bug Blocks:	1488388

Description Prasad Pandit 2017-10-06 05:26:11 UTC

Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9
File System(9pfs) support, is vulnerable to an information disclosure issue.
It could occur while accessing extended attributes of a file due to a race
condition.

A user inside guest could use this flaw to disclose uninitialised heap
memory contents on the host.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-10/msg00729.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/10/06/1

Comment 1 Prasad Pandit 2017-10-06 05:26:45 UTC

Acknowledgments:

Name: Tuomas Tynkkynen

Comment 2 Prasad Pandit 2017-10-06 05:27:42 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1499111]

Comment 3 Fedora Update System 2017-11-07 22:12:36 UTC

qemu-2.9.1-2.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2017-11-11 02:58:01 UTC

qemu-2.10.1-1.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.