Bug 877393 (CVE-2012-5514) - CVE-2012-5514 kernel: xen: Broken error handling in guest_physmap_mark_populate_on_demand()
Summary: CVE-2012-5514 kernel: xen: Broken error handling in guest_physmap_mark_popula...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2012-5514
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: 883091
Blocks: 877406
TreeView+ depends on / blocked
 
Reported: 2012-11-16 12:14 UTC by Petr Matousek
Modified: 2023-05-11 20:53 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-08-24 14:03:38 UTC
Embargoed:

Attachments (Terms of Use)

Description Petr Matousek 2012-11-16 12:14:41 UTC 
guest_physmap_mark_populate_on_demand(), before carrying out its actual
operation, checks that the subject GFNs are not in use. If that check fails,
the code prints a message and bypasses the gfn_unlock() matching the
gfn_lock() carried out before entering the loop.

A malicious HVM guest administrator can cause Xen to hang.

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.
Comment 3 Petr Matousek 2012-11-16 12:18:30 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 5 Petr Matousek 2012-12-03 18:19:33 UTC 
Created xen tracking bugs for this issue

Affects: fedora-all [bug 883091]
Comment 6 Fedora Update System 2012-12-13 06:00:49 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 17:56:14 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.
Note You need to log in before you can comment on or make changes to this bug.