Bug 964259 (CVE-2013-2076)

Summary:	CVE-2013-2076 kernel: xen: Information leak on XSAVE/XRSTOR capable AMD CPUs
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	drjones, imammedo, pbonzini, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-05-17 16:46:17 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:	970206
Bug Blocks:	964266

Description Petr Matousek 2013-05-17 16:43:09 UTC

On AMD processors supporting XSAVE/XRSTOR (family 15h and up), when an exception is pending, these instructions save/restore only the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR. This allows one domain to determine portions of the state of floating point instructions of other domains.

A malicious domain may be able to leverage this to obtain sensitive information such as cryptographic keys from another domain.

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.

Comment 3 Petr Matousek 2013-05-17 16:46:17 UTC

Statement:

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.

This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.

Comment 4 Petr Matousek 2013-06-03 16:48:49 UTC

Now public via:

http://www.openwall.com/lists/oss-security/2013/06/03/1

Comment 5 Petr Matousek 2013-06-03 16:53:50 UTC

Created xen tracking bugs for this issue

Affects: fedora-all [bug 970206]

Comment 6 Fedora Update System 2013-06-13 06:50:21 UTC

xen-4.2.2-6.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2013-06-14 02:28:17 UTC

xen-4.2.2-6.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2013-06-16 05:44:07 UTC

xen-4.1.5-5.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.