Bug 1160664 – CVE-2014-8594 kernel: xen: Insufficient restrictions on certain MMU update hypercalls (xsa109)

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Bug 1160664 - (CVE-2014-8594, xsa109) CVE-2014-8594 kernel: xen: Insufficient restrictions on certain MMU update hypercalls (xsa109)

Summary:	CVE-2014-8594 kernel: xen: Insufficient restrictions on certain MMU update hy...

Status:	CLOSED NOTABUG

Aliases:	CVE-2014-8594, xsa109

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20141118,reported=2...
Keywords:	Security

Depends On:	1165205
Blocks:	1160648
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Reported:	2014-11-05 05:45 EST by Petr Matousek
Modified:	2015-02-16 10:47 EST (History)
CC List:	15 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-11-05 10:16:46 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Petr Matousek 2014-11-05 05:45:48 EST

MMU update operations targeting page tables are intended to be used on
PV guests only. The lack of a respective check made it possible for
such operations to access certain function pointers which remain NULL
when the target guest is using Hardware Assisted Paging (HAP).

Malicious or buggy stub domain kernels or tool stacks otherwise living
outside of Domain0 can mount a denial of service attack which, if
successful, can affect the whole system.

Acknowledgements:

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

Comment 5 Petr Matousek 2014-11-05 10:16:46 EST

Statement:

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.

Comment 6 Vincent Danen 2014-11-18 09:46:50 EST

External References:

http://xenbits.xen.org/xsa/advisory-109.html

Comment 7 Vincent Danen 2014-11-18 09:47:55 EST

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1165205]

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