Bug 808199 (CVE-2012-1601)

Summary:	CVE-2012-1601 kernel: kvm: irqchip_in_kernel() and vcpu->arch.apic inconsistency
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anton, arozansk, bhu, davej, dhoward, ehabkost, fhrbata, gansalmon, itamar, jforbes, jkacur, jonathan, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, minovotn, mkenneth, mtosatti, rt-maint, sforsber, virt-maint, williams
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:	2013-08-24 13:55:05 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:	807507, 807854, 808205, 808206, 808207
Bug Blocks:	800835

Description Petr Matousek 2012-03-29 19:31:49 UTC

If some vcpus are created before KVM_CREATE_IRQCHIP, then irqchip_in_kernel() and vcpu->arch.apic will be inconsistent, leading to potential NULL pointer dereferences.

A unprivileged local user could use this flaw to crash the system.

References:
http://comments.gmane.org/gmane.comp.emulators.kvm.devel/86217
http://git.kernel.org/?p=virt/kvm/kvm.git;a=commit;h=5b40572ed5f0344b9dbee486a17c589ce1abe1a3

Comment 5 Petr Matousek 2012-03-29 19:48:47 UTC

Created kernel tracking bugs for this issue

Affects: fedora-all [bug 808207]

Comment 6 Petr Matousek 2012-03-29 19:51:41 UTC

Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise MRG as they did not provide support for the KVM subsystem. This has been addressed in Red Hat Enterprise Linux 6 via https://rhn.redhat.com/errata/RHSA-2012-0571.html. This has been addressed in Red Hat Enterprise Linux 5 via RHSA-2012:0676 https://rhn.redhat.com/errata/RHSA-2012-0676.html.

Comment 7 Kurt Seifried 2012-03-30 01:07:02 UTC

Added CVE as per http://www.openwall.com/lists/oss-security/2012/03/30/1

Comment 8 errata-xmlrpc 2012-05-15 23:10:53 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:0571 https://rhn.redhat.com/errata/RHSA-2012-0571.html

Comment 9 errata-xmlrpc 2012-05-21 14:26:42 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2012:0676 https://rhn.redhat.com/errata/RHSA-2012-0676.html