Bug 964259 (CVE-2013-2076) - CVE-2013-2076 kernel: xen: Information leak on XSAVE/XRSTOR capable AMD CPUs
Summary: CVE-2013-2076 kernel: xen: Information leak on XSAVE/XRSTOR capable AMD CPUs
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2013-2076
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 970206
Blocks: 964266
TreeView+ depends on / blocked
 
Reported: 2013-05-17 16:43 UTC by Petr Matousek
Modified: 2021-02-17 07:41 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-05-17 16:46:17 UTC


Attachments (Terms of Use)

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.


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