Bug 1140280 – CVE-2014-6268 kernel: xen: Mishandling of uninitialised FIFO-based event channel control blocks (xsa107)

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Bug 1140280 - (CVE-2014-6268) CVE-2014-6268 kernel: xen: Mishandling of uninitialised FIFO-based event channel control blocks (xsa107)

Summary:	CVE-2014-6268 kernel: xen: Mishandling of uninitialised FIFO-based event chan...

Status:	CLOSED NOTABUG

Aliases:	CVE-2014-6268

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

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

URL:
Whiteboard:	impact=moderate,public=20140909,repor...
Keywords:	Security

Depends On:	1140287
Blocks:	1140259
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Reported:	2014-09-10 11:50 EDT by Petr Matousek
Modified:	2015-02-16 10:43 EST (History)
CC List:	18 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-09-10 11:53:23 EDT
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 2014-09-10 11:50:53 EDT

When using the FIFO-based event channels, there are no checks for the
existence of a control block when binding an event or moving it to a
different VCPU. As a result, a buggy or malicious guest can crash the
host.

References:

http://xenbits.xen.org/xsa/advisory-107.html
http://www.openwall.com/lists/oss-security/2014/09/09/22

Acknowledgements:

Red Hat would like to thank the Xen for reporting this issue. Xen acknowledges
Vitaly Kuznetsov from Red Hat as the original reporter of this issue and David
Vrabel of Citrix as the one who diagnosed this issue as having security
repercussions.

Comment 3 Petr Matousek 2014-09-10 11:53:23 EDT

Statement:

Not vulnerable.

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

Comment 4 Petr Matousek 2014-09-10 11:53:54 EDT

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1140287]

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