Bug 1144897 (CVE-2014-3647)

Summary:	CVE-2014-3647 kernel: kvm: noncanonical rip after emulation
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:	aquini, areis, carnil, dhoward, drjones, ehabkost, fhrbata, kernel-mgr, knoel, mkenneth, mrezanin, mst, mtosatti, nmurray, pbonzini, plougher, rkrcmar, rvrbovsk, security-response-team, stefanha
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	A flaw was found in the way the Linux kernel's KVM subsystem handled non-canonical addresses when emulating instructions that change the RIP (for example, branches or calls). A guest user with access to an I/O or MMIO region could use this flaw to crash the guest.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:34:58 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:	1152993, 1152994, 1152995, 1152996, 1152997
Bug Blocks:	1144830

Description Petr Matousek 2014-09-21 22:32:53 UTC

kvm currently mishandles noncanonical addresses when emulating instructions
that change rip (eg branches, calls), potentially causing a failed VM-entry.

A guest user with access to I/O or MMIO region can use this flaw to crash the
guest.

Acknowledgements:

Red Hat would like to thank Nadav Amit for reporting this issue.

Comment 4 Petr Matousek 2014-10-15 10:52:56 UTC

Statement:

This issue does affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7. Future kernel updates may address this issue.

This issue does affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6. The risks associated with fixing this bug are greater than its security impact. This issue is not currently planned to be addressed in future kernel updates for Red Hat Enterprise Linux 6.

This issue does affect the kvm packages as shipped with Red Hat Enterprise Linux 5.

Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Comment 5 Petr Matousek 2014-10-24 16:17:58 UTC

Upstream patches:
http://git.kernel.org/cgit/virt/kvm/kvm.git/commit/?id=d1442d85cc30ea75f7d399474ca738e0bc96f715
http://git.kernel.org/cgit/virt/kvm/kvm.git/commit/?id=234f3ce485d54017f15cf5e0699cff4100121601

Comment 6 errata-xmlrpc 2015-11-19 20:20:26 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2152 https://rhn.redhat.com/errata/RHSA-2015-2152.html

Comment 7 errata-xmlrpc 2015-11-19 23:23:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2152 https://rhn.redhat.com/errata/RHSA-2015-2152.html