Bug 877358 (CVE-2012-5510) - CVE-2012-5510 kernel: xen: Grant table version switch list corruption vulnerability
Summary: CVE-2012-5510 kernel: xen: Grant table version switch list corruption vulnera...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2012-5510
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: 883082
Blocks: 877406
TreeView+ depends on / blocked
 
Reported: 2012-11-16 10:52 UTC by Petr Matousek
Modified: 2023-05-11 20:50 UTC (History)
15 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-08-24 14:02:33 UTC
Embargoed:

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Description Petr Matousek 2012-11-16 10:52:07 UTC 
Downgrading the grant table version of a guest involves freeing its
status pages. This freeing was incomplete - the page(s) are freed back
to the allocator, but not removed from the domain's tracking
list. This would cause list corruption, eventually leading to a
hypervisor crash.
                                                                                                                                                             
A malicious guest administrator can cause Xen to crash, leading to a
denial of service attack.

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.
Comment 3 Petr Matousek 2012-11-16 10:58:44 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 2012-12-03 18:07:33 UTC 
Created xen tracking bugs for this issue

Affects: fedora-all [bug 883082]
Comment 5 Fedora Update System 2012-12-12 00:16:04 UTC 
xen-4.2.0-6.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2012-12-13 06:00:08 UTC 
xen-4.1.3-7.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 2012-12-15 17:55:36 UTC 
xen-4.1.3-6.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.
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