ESB-2018.1862 - [RedHat] qemu-kvm: Access privileged data - Existing account 2018-06-27

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1862
                    Important: qemu-kvm security update
                               27 June 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           qemu-kvm
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 7
                   Red Hat Enterprise Linux WS/Desktop 7
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-3639  

Reference:         ASB-2018.0121
                   ESB-2018.1797
                   ESB-2018.1750
                   ESB-2018.1549
                   ESB-2018.1548.6
                   ESB-2018.1545

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2018:2001

- --------------------------BEGIN INCLUDED TEXT--------------------

- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: qemu-kvm security update
Advisory ID:       RHSA-2018:2001-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:2001
Issue date:        2018-06-26
CVE Names:         CVE-2018-3639 
=====================================================================

1. Summary:

An update for qemu-kvm is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64

3. Description:

Kernel-based Virtual Machine (KVM) is a full virtualization solution for
Linux on a variety of architectures. The qemu-kvm packages provide the
user-space component for running virtual machines that use KVM.

Security Fix(es):

* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of Load & Store instructions
(a commonly used performance optimization). It relies on the presence of a
precisely-defined instruction sequence in the privileged code as well as
the fact that memory read from address to which a recent memory write has
occurred may see an older value and subsequently cause an update into the
microprocessor's data cache even for speculatively executed instructions
that never actually commit (retire). As a result, an unprivileged attacker
could use this flaw to read privileged memory by conducting targeted cache
side-channel attacks. (CVE-2018-3639)

Note: This is the qemu-kvm side of the CVE-2018-3639 mitigation that
includes support for guests running on hosts with AMD processors.

Red Hat would like to thank Ken Johnson (Microsoft Security Response
Center) and Jann Horn (Google Project Zero) for reporting this issue.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, shut down all running virtual machines. Once
all virtual machines have shut down, start them again for this update to
take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1566890 - CVE-2018-3639 hw: cpu: speculative store bypass

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
qemu-kvm-1.5.3-156.el7_5.3.src.rpm

x86_64:
qemu-img-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-common-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-tools-1.5.3-156.el7_5.3.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

Source:
qemu-kvm-1.5.3-156.el7_5.3.src.rpm

x86_64:
qemu-img-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-common-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-tools-1.5.3-156.el7_5.3.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
qemu-kvm-1.5.3-156.el7_5.3.src.rpm

x86_64:
qemu-img-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-common-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-tools-1.5.3-156.el7_5.3.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
qemu-kvm-1.5.3-156.el7_5.3.src.rpm

x86_64:
qemu-img-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-common-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-156.el7_5.3.x86_64.rpm
qemu-kvm-tools-1.5.3-156.el7_5.3.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-2018-3639
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/ssbd

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2018 Red Hat, Inc.
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQIVAwUBWzJvV9zjgjWX9erEAQguxA/8CLvO8TNCYe6rUjfEKSA6mWcdNpPS0WtB
P7UpHOP2Al9iBrTtAlJsfwSUL9kwd9e4+EgJQHxVB5b0z+WmfzdKr967qe7slIk5
vBhqodHygs/xtzOxxfVbvbYWLeszFkqbiCVEF4xHG4sQXA3xqBs3+8Hq1ME7ywt1
Bk/a4s9apn/iFtL539PkirUZBcpZe6zkoK7RbRSwLfStNk5Ol95wOPYALHez4k2N
ZEykbuMIAIjHz79/R4G9rMjSudQ8y04zKwbX3/9GeyvnMZrs82AHEHGz7UUWV0Xz
jKvf7hotzFYFfE+YSU+ruS/cXtUh1+KKkRRQTaNb3Vg0Eo+LAxOyVLGo7RWhJr8k
BgKs5iMWDQa6qSo+TMRjhCUawlUYvH6HeHLWhU/rFwbe181yg0NsY+sUHCvjSATP
7ZxG+7oMCh0sfmKv+hwoAb7YKhqpZ3qoXEocMDLhu1+kouymMbPaFGPsmoaZylLk
OtVfNQHBj5HqBilCmfb72Ht9fA4wXyG+U8aLFA8xbo5tRXKy2W9b5G/hwV8p1N9a
BP8VNiUGfW9yqe7KL5C6hN3DxtZ1l2+53ubznngzI8ZiWtM+tJ0jdIatKqGQWgeI
w1baJ13s6ZCAO81N/Zlz5t7gu1wgwlAwiMUw5O8GyIPKcFNt0w8vGs2Ak4gu9zeS
6dT6imDkvro=
=Fqij
- -----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:

        https://www.auscert.org.au/bulletins/

===========================================================================
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

iQIVAwUBWzLbQGaOgq3Tt24GAQjcVBAAsEP2g9TNtjxE63xMXsu1sDNtzBvPI3hP
I3dVEuBkmBNk6ExLQJYCz6++6E1rGA6JOfsNxnd/7OKMI6P8XzgLu2mVvMN+UIkg
0yrcRJ1WKKQKx/mVhzEMBgofXHyFi5Pw0N53eo59bECC8dTgUlpmVa9BHvSku6Pw
pENjwgJ79CbBxdIAc3yK48Bx8nCfX2GqNx/NwIbvIHt0uLgotAH60hrxjFrxFLJA
bB7E4AuE36eCeOSGGtCoNmdG0B/gSutZPdQvY7xaAzmIe+WBQBfFpxnZ5YBDhsey
QYp4+7bsBUMyqv/qTqoEaVlz1iZz526y3xTdcG6AKFQ3WYB6DsjjyeIjCmiWvvH4
CB2bEpJ1y9tLb7sqLLEaG8mTh11bccHwin1WYeBlkZKZaMGSPZVNzJcldUiP+QzJ
tJOnbjHDd3fQvhCR5wKtHrF8ZXSh+FS7M/yKBrlWVL1wh4ZwpoRDxigXCrr9NUYJ
FSYPeQD0S38ihpPTP4dwdrXQ37qBbaMw59QuiA5YLpWge8IhHOoo0SpOhsCUNQ9W
4/cZL6mzt82rYA0Kj0xBxWYNaBdxh5wUvzZXcrdvPv70jessocHJFNZ+d6owY5bg
uN+4vTIpi/cWzPFYWkmF8m6oOZDTc07OoSp/z+BjgJJgbbNu2B3IbP+jtqamCnRV
xvNTVU7JVPE=
=z8Ft
-----END PGP SIGNATURE-----

« Back to bulletins