Bug 531660 – CVE-2009-3722 KVM: Check cpl before emulating debug register access

Bugzilla will be upgraded to version 5.0 on a still to be determined date in the near future. The original upgrade date has been delayed.

Bug 531660 - (CVE-2009-3722) CVE-2009-3722 KVM: Check cpl before emulating debug register access

Summary:	CVE-2009-3722 KVM: Check cpl before emulating debug register access

Status:	CLOSED ERRATA

Aliases:	CVE-2009-3722

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:	Karen Noel
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,reported=20091029,pub...
Keywords:	Reopened, Security

Depends On:	531661 563516 563517 563934
Blocks:
	Show dependency tree / graph

Reported:	2009-10-28 23:09 EDT by Eugene Teo (Security Response)
Modified:	2013-01-09 06:28 EST (History)
CC List:	8 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-04-20 08:18:55 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2010:0126	normal	SHIPPED_LIVE	Important: kvm security and bug fix update	2010-03-01 14:23:38 EST
Red Hat Product Errata	RHSA-2010:0172	normal	SHIPPED_LIVE	Important: rhev-hypervisor security and bug fix update	2010-03-24 11:46:46 EDT

Groups: None (edit)

Description Eugene Teo (Security Response) 2009-10-28 23:09:31 EDT

Quote from the upstream commit:
Debug registers may only be accessed from cpl 0.  Unfortunately, vmx will code to emulate the instruction even though it was issued from guest userspace, possibly leading to an unexpected trap later.

Introduced in v2.6.30-rc1; Fixed in v2.6.32-rc1.

http://git.kernel.org/linus/0a79b009525b160081d75cef5dbf45817956acf2

Comment 3 Eugene Teo (Security Response) 2009-10-28 23:22:20 EDT

None of our kernels is affected by this vulnerability. Closing this bug as NOTABUG.

Comment 4 Chuck Ebbert 2009-10-29 07:29:06 EDT

Also fixed in 2.6.30.9 and 2.6.31.1

Comment 5 Avi Kivity 2010-02-10 08:35:13 EST

The kvm package in RHEL 5.[45] is in fact vulnerable.

Comment 9 errata-xmlrpc 2010-03-01 14:23:50 EST

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2010:0126 https://rhn.redhat.com/errata/RHSA-2010-0126.html

Comment 10 errata-xmlrpc 2010-03-24 11:47:02 EDT

This issue has been addressed in following products:

  Red Hat Enterprise Virtualization for RHEL-5

Via RHSA-2010:0172 https://rhn.redhat.com/errata/RHSA-2010-0172.html

Comment 11 Avi Kivity 2010-12-22 04:55:42 EST

Should this bug be closed?

Note You need to log in before you can comment on or make changes to this bug.