Bug 892647 (CVE-2013-0154)

Summary: CVE-2013-0154 kernel: xen: Hypervisor crash due to incorrect ASSERT (debug build only)
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, anton, dhoward, drjones, imammedo, lersek, lwang, mrezanin, pbonzini, plougher, rvrbovsk, sforsber, tburke, xen-maint
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2013-01-07 14:02:14 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:    
Bug Blocks: 892648    

Description Petr Matousek 2013-01-07 13:56:19 UTC 
A change to an internal interface within the hypervisor invalidated an
ASSERT in a caller of that API. This code path is exposed to PV guests
via a hypercall allowing administrators of PV guests to crash the
hypervisor if it is built with debugging enabled.

Malicious administrators of PV guests running on hypervisors built
with the non-default debug=y option can crash the host.

References:
http://seclists.org/oss-sec/2013/q1/17

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.
Comment 2 Petr Matousek 2013-01-07 13:57:21 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.