Bug 1033106 (CVE-2013-6376)

Summary:	CVE-2013-6376 kernel: kvm: BUG_ON() in apic_cluster_id()
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	agordeev, anton, aquini, dhoward, fhrbata, gleb, kernel-mgr, lwang, npajkovs, pbonzini, pholasek, security-response-team
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:	2013-11-21 14:52:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1042099, 1042101
Bug Blocks:	1030995

Description Petr Matousek 2013-11-21 14:51:57 UTC

Privileged guest user could trigger BUG_ON() in apic_cluster_id() when writing certain values to ICR register to request an IPI, while in x2apic mode.

A privileged guest user could use this flaw to crash the host.

Acknowledgements:

Red Hat would like to thank Lars Bull of Google for reporting this issue.

Comment 1 Petr Matousek 2013-11-21 14:52:57 UTC

Statement:

Not vulnerable.

This issue did not affect the versions of kvm packages as shipped with Red Hat Enterprise Linux 5. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise 6.

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise MRG 2 as they did not provide support for the KVM subsystem.

Comment 3 Petr Matousek 2013-12-12 20:57:21 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1042099]

Comment 4 Fedora Update System 2013-12-21 02:14:21 UTC

kernel-3.12.5-200.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2013-12-21 02:24:09 UTC

kernel-3.12.5-302.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.