Bug 950686 (CVE-2013-1919) - CVE-2013-1919 kernel: xen: Several access permission issues with IRQs for unprivileged guests
Summary: CVE-2013-1919 kernel: xen: Several access permission issues with IRQs for unp...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2013-1919
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: 953568
Blocks: 950673
TreeView+ depends on / blocked
 
Reported: 2013-04-10 16:34 UTC by Petr Matousek
Modified: 2021-02-17 07:50 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-05-13 08:01:36 UTC


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Description Petr Matousek 2013-04-10 16:34:03 UTC
Various IRQ related access control operations may not have the intended effect, thus potentially permitting a stub domain to gran its client domain access to an IRQ it doesn't have access to itself.

Malicious or buggy stub domains kernels can mount a denial of service attack possibly affecting the whole system.

Only Xen systems using stub domains are vulnerable.

Only HVM guests with passed-through IRQs or PCI devices are able to exploit the vulnerability.

Acknowledgements:

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

Comment 1 Petr Matousek 2013-04-10 16:36:24 UTC
Statement:

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5 as it has no support for stub domains.

This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.

Comment 7 Petr Matousek 2013-04-18 13:43:23 UTC
Created xen tracking bugs for this issue

Affects: fedora-all [bug 953568]

Comment 8 Fedora Update System 2013-05-05 02:25:03 UTC
xen-4.1.5-1.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2013-05-05 02:25:39 UTC
xen-4.2.2-1.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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