Bug 531660 (CVE-2009-3722)

Summary: CVE-2009-3722 KVM: Check cpl before emulating debug register access
Product: [Other] Security Response Reporter: Eugene Teo (Security Response) <eteo>
Component: vulnerabilityAssignee: Karen Noel <knoel>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bhu, ehabkost, jkacur, knoel, lgoncalv, mtosatti, pmatouse, williams
Target Milestone: ---Keywords: Reopened, Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-04-20 12:18:55 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: 531661, 563516, 563517, 563934    
Bug Blocks:    

Description Eugene Teo (Security Response) 2009-10-29 03:09:31 UTC 
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) 2009-10-29 03:22:20 UTC 
None of our kernels is affected by this vulnerability. Closing this bug as NOTABUG.
Comment 4 Chuck Ebbert 2009-10-29 11:29:06 UTC 
Also fixed in 2.6.30.9 and 2.6.31.1
Comment 5 Avi Kivity 2010-02-10 13:35:13 UTC 
The kvm package in RHEL 5.[45] is in fact vulnerable.
Comment 9 errata-xmlrpc 2010-03-01 19:23:50 UTC 
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 15:47:02 UTC 
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 09:55:42 UTC 
Should this bug be closed?