Bug 851193 (CVE-2012-3498) - CVE-2012-3498 kernel: xen: PHYSDEVOP_map_pirq index vulnerability
Summary: CVE-2012-3498 kernel: xen: PHYSDEVOP_map_pirq index vulnerability
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2012-3498
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: 854593
Blocks: 851204
TreeView+ depends on / blocked
 
Reported: 2012-08-23 13:21 UTC by Petr Matousek
Modified: 2019-09-29 12:55 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-06-10 10:59:13 UTC


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Description Petr Matousek 2012-08-23 13:21:49 UTC
PHYSDEVOP_map_pirq with MAP_PIRQ_TYPE_GSI does not range check map->index.

A malicious HVM guest kernel can crash the host.  It might also be able to read hypervisor or guest memory.

All Xen systems running HVM guests are vulnerable.  PV guests are not vulnerable.

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Matthew Daley as the original reporter.

Comment 3 Petr Matousek 2012-08-23 13:29:59 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 2012-09-05 11:54:09 UTC
Now public via:

http://seclists.org/oss-sec/2012/q3/380

Comment 5 Petr Matousek 2012-09-05 11:55:11 UTC
Created xen tracking bugs for this issue

Affects: fedora-all [bug 854593]

Comment 6 Fedora Update System 2012-09-17 18:00:19 UTC
xen-4.1.3-2.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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