Bug 1140280 (CVE-2014-6268)

Summary: CVE-2014-6268 kernel: xen: Mishandling of uninitialised FIFO-based event channel control blocks (xsa107)
Product: [Other] Security Response Reporter: Petr Matousek <pmatouse>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: agordeev, dhoward, drjones, imammedo, jforbes, kraxel, lwang, m.a.young, mrezanin, nmurray, pbonzini, pholasek, plougher, rkrcmar, rvrbovsk, virt-maint, vkuznets, xen-maint
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-09-10 15:53:23 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1140287    
Bug Blocks: 1140259    

Description Petr Matousek 2014-09-10 15:50:53 UTC 
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 15:53:23 UTC 
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 15:53:54 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1140287]