Bug 877397 (CVE-2012-5515) - CVE-2012-5515 kernel: xen: Several memory hypercall operations allow invalid extent order values
Summary: CVE-2012-5515 kernel: xen: Several memory hypercall operations allow invalid ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2012-5515
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: 878449 878450 883092
Blocks: 877406
TreeView+ depends on / blocked
 
Reported: 2012-11-16 12:26 UTC by Petr Matousek
Modified: 2021-02-17 08:23 UTC (History)
16 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-08-24 14:03:02 UTC


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2013:0168 0 normal SHIPPED_LIVE Moderate: kernel security and bug fix update 2013-01-23 00:55:33 UTC

Description Petr Matousek 2012-11-16 12:26:13 UTC
Allowing arbitrary extent_order input values for XENMEM_decrease_reservation,
XENMEM_populate_physmap, and XENMEM_exchange can cause arbitrarily long time
being spent in loops without allowing vital other code to get a chance to
execute. This may also cause inconsistent state resulting at the completion
of these hypercalls.
                                                                                                                                                             
A malicious guest administrator can cause Xen to hang.                                                                                                       

Versions of Xen that do not support supporting Populate-on-Demand may
only be theoretically affected.     

Acknowledgements:

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

Comment 2 Petr Matousek 2012-11-16 12:28:16 UTC
Please note that we do not support Populate-on-Demand in Xen hypervisor as shipped with Red Hat Enterprise Linux 5.

Comment 3 Petr Matousek 2012-11-16 12:28:41 UTC
Statement:

This issue did 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 15 Petr Matousek 2012-12-03 18:25:38 UTC
Created xen tracking bugs for this issue

Affects: fedora-all [bug 883092]

Comment 16 Fedora Update System 2012-12-13 06:00:57 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 17 Fedora Update System 2012-12-15 17:56:22 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.

Comment 18 errata-xmlrpc 2013-01-22 19:56:34 UTC
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2013:0168 https://rhn.redhat.com/errata/RHSA-2013-0168.html


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