Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2015.1112
Important: kvm security update
23 April 2015
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kvm
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 5
Red Hat Enterprise Linux WS/Desktop 5
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2014-3611 CVE-2014-3610
Reference: ESB-2015.0485
ESB-2015.0281
ESB-2014.2438
ESB-2014.2016
ESB-2014.1990
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2015-0869.html
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: kvm security update
Advisory ID: RHSA-2015:0869-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0869.html
Issue date: 2015-04-22
CVE Names: CVE-2014-3610 CVE-2014-3611
=====================================================================
1. Summary:
Updated kvm packages that fix two security issues are now available for Red
Hat Enterprise Linux 5.
Red Hat Product Security has rated this update as having Important security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.
2. Relevant releases/architectures:
RHEL Desktop Multi OS (v. 5 client) - x86_64
RHEL Virtualization (v. 5 server) - x86_64
3. Description:
KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for
the standard Red Hat Enterprise Linux kernel.
It was found that KVM's Write to Model Specific Register (WRMSR)
instruction emulation would write non-canonical values passed in by the
guest to certain MSRs in the host's context. A privileged guest user could
use this flaw to crash the host. (CVE-2014-3610)
A race condition flaw was found in the way the Linux kernel's KVM subsystem
handled PIT (Programmable Interval Timer) emulation. A guest user who has
access to the PIT I/O ports could use this flaw to crash the host.
(CVE-2014-3611)
Red Hat would like to thank Lars Bull of Google and Nadav Amit for
reporting the CVE-2014-3610 issue, and Lars Bull of Google for reporting
the CVE-2014-3611 issue.
All kvm users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. Note: The procedure in
the Solution section must be performed before this update will take effect.
4. Solution:
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
The following procedure must be performed before this update will take
effect:
1) Stop all KVM guest virtual machines.
2) Either reboot the hypervisor machine or, as the root user, remove (using
"modprobe -r [module]") and reload (using "modprobe [module]") all of the
following modules which are currently running (determined using "lsmod"):
kvm, ksm, kvm-intel or kvm-amd.
3) Restart the KVM guest virtual machines.
5. Bugs fixed (https://bugzilla.redhat.com/):
1144878 - CVE-2014-3611 kernel: kvm: PIT timer race condition
1144883 - CVE-2014-3610 kernel: kvm: noncanonical MSR writes
6. Package List:
RHEL Desktop Multi OS (v. 5 client):
Source:
kvm-83-270.el5_11.src.rpm
x86_64:
kmod-kvm-83-270.el5_11.x86_64.rpm
kmod-kvm-debug-83-270.el5_11.x86_64.rpm
kvm-83-270.el5_11.x86_64.rpm
kvm-debuginfo-83-270.el5_11.x86_64.rpm
kvm-qemu-img-83-270.el5_11.x86_64.rpm
kvm-tools-83-270.el5_11.x86_64.rpm
RHEL Virtualization (v. 5 server):
Source:
kvm-83-270.el5_11.src.rpm
x86_64:
kmod-kvm-83-270.el5_11.x86_64.rpm
kmod-kvm-debug-83-270.el5_11.x86_64.rpm
kvm-83-270.el5_11.x86_64.rpm
kvm-debuginfo-83-270.el5_11.x86_64.rpm
kvm-qemu-img-83-270.el5_11.x86_64.rpm
kvm-tools-83-270.el5_11.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2014-3610
https://access.redhat.com/security/cve/CVE-2014-3611
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2015 Red Hat, Inc.
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iD8DBQFVN3s3XlSAg2UNWIIRAg/UAKCBiZgLwNuXdKojCQWm2SRiRQ6cigCfZhEj
TXPj/BwdH1WwdLjMvtODoQM=
=MgBT
- -----END PGP SIGNATURE-----
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/render.html?cid=1980
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=4mZ4
-----END PGP SIGNATURE-----