Bug 870106 (CVE-2012-4538) - CVE-2012-4538 kernel: xen: Unhooking empty PAE entries can crash Xen
Summary: CVE-2012-4538 kernel: xen: Unhooking empty PAE entries can crash Xen
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2012-4538
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: 876205
Blocks: 870154
TreeView+ depends on / blocked
 
Reported: 2012-10-25 14:48 UTC by Petr Matousek
Modified: 2023-05-11 20:00 UTC (History)
6 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2013-04-15 14:23:39 UTC
Embargoed:

Attachments (Terms of Use)

Description Petr Matousek 2012-10-25 14:48:22 UTC 
The HVMOP_pagetable_dying hypercall does not correctly check the caller's pagetable state, leading to a hypervisor crash.

An HVM guest running on shadow pagetables (that is, not HAP) can cause the hypervisor to crash.

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.
Comment 2 Paolo Bonzini 2012-10-25 15:00:52 UTC 
RHEL5 is not affected.
Comment 3 Petr Matousek 2012-10-25 16:18:38 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 2012-11-13 14:48:06 UTC 
Created xen tracking bugs for this issue

Affects: fedora-all [bug 876205]
Comment 5 Fedora Update System 2012-11-23 02:55:36 UTC 
xen-4.1.3-4.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2012-11-23 02:59:15 UTC 
xen-4.1.3-6.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 7 Fedora Update System 2012-11-23 07:20:47 UTC 
xen-4.2.0-4.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.
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