Bug 906309 (CVE-2013-0228)

Summary: CVE-2013-0228 kernel: xen: userspace alterable %ds access in xen_iret()
Product: [Other] Security Response Reporter: Petr Matousek <pmatouse>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: agordeev, anton, bfan, dhoward, drjones, fhrbata, imammedo, leiwang, lersek, lwang, pbonzini, security-response-team, sforsber, wshi
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2013-08-24 13:32:37 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: 906310, 906311, 910848    
Bug Blocks: 906319    

Description Petr Matousek 2013-01-31 12:30:16 UTC 
A flaw was found in the way xen_iret() used userspace alterable %ds. An unprivileged local guest user in the 32-bit PV Xen domain could use this flaw to crash the guest or, potentially, escalate their privileges.

Acknowledgements:

This issue was discovered by Andrew Jones of Red Hat.
Comment 3 Petr Matousek 2013-01-31 13:03:41 UTC 
Statement:

This issue did affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 6.

This issue did not affect Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.
Comment 6 Petr Matousek 2013-02-13 16:57:19 UTC 
Public now via:

http://permalink.gmane.org/gmane.comp.security.oss.general/9371
Comment 7 Petr Matousek 2013-02-13 16:59:38 UTC 
Created kernel tracking bugs for this issue

Affects: fedora-all [bug 910848]
Comment 8 Josh Boyer 2013-02-14 14:17:07 UTC 
Queued up for Linus' tree here:

https://git.kernel.org/?p=linux/kernel/git/konrad/xen.git;a=commitdiff;h=13d2b4d11d69a92574a55bfd985cfb0ca77aebdc
Comment 9 Fedora Update System 2013-02-24 08:37:18 UTC 
kernel-3.7.9-101.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 10 errata-xmlrpc 2013-03-12 18:59:28 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2013:0630 https://rhn.redhat.com/errata/RHSA-2013-0630.html