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Sicherheit: Zwei Probleme in QEMU
Aktuelle Meldungen Distributionen
Name: Zwei Probleme in QEMU
ID: RHSA-2016:0088-01
Distribution: Red Hat
Plattformen: Red Hat Enterprise Linux OpenStack Platform
Datum: Do, 28. Januar 2016, 23:36
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1568
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1714

Originalnachricht

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

Synopsis: Important: qemu-kvm-rhev security update
Advisory ID: RHSA-2016:0088-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0088.html
Issue date: 2016-01-28
CVE Names: CVE-2016-1568 CVE-2016-1714
=====================================================================

1. Summary:

Updated qemu-kvm-rhev packages that fix two security issues are now
available for Red Hat Enterprise Linux OpenStack Platform 7.

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:

Red Hat Enterprise Linux OpenStack Platform 7.0 for RHEL 7 - x86_64

3. Description:

KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the
user-space component for running virtual machines using KVM.

A use-after-free flaw was found in the way QEMU's IDE AHCI emulator
processed certain AHCI Native Command Queuing (NCQ) AIO commands.
A privileged guest user could use this flaw to crash the QEMU process
instance or, potentially, execute arbitrary code on the host with
privileges of the QEMU process. (CVE-2016-1568)

An out-of-bounds read/write flaw was discovered in the way QEMU's Firmware
Configuration device emulation processed certain firmware configurations.
A privileged (CAP_SYS_RAWIO) guest user could use this flaw to crash the
QEMU process instance or, potentially, execute arbitrary code on the host
with privileges of the QEMU process. (CVE-2016-1714)

Red Hat would like to thank Qinghao Tang of Qihoo 360 Marvel Team for
reporting the CVE-2016-1568 issue, and Donghai Zhu of Alibaba for reporting
the CVE-2016-1714 issue.

All qemu-kvm-rhev users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues. 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.

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

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

1288532 - CVE-2016-1568 Qemu: ide: ahci use-after-free vulnerability in aio
port commands
1296060 - CVE-2016-1714 Qemu: nvram: OOB r/w access in processing firmware
configurations

6. Package List:

Red Hat Enterprise Linux OpenStack Platform 7.0 for RHEL 7:

Source:
qemu-kvm-rhev-2.3.0-31.el7_2.7.src.rpm

x86_64:
libcacard-rhev-2.3.0-31.el7_2.7.x86_64.rpm
libcacard-tools-rhev-2.3.0-31.el7_2.7.x86_64.rpm
qemu-img-rhev-2.3.0-31.el7_2.7.x86_64.rpm
qemu-kvm-common-rhev-2.3.0-31.el7_2.7.x86_64.rpm
qemu-kvm-rhev-2.3.0-31.el7_2.7.x86_64.rpm
qemu-kvm-rhev-debuginfo-2.3.0-31.el7_2.7.x86_64.rpm
qemu-kvm-tools-rhev-2.3.0-31.el7_2.7.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-2016-1568
https://access.redhat.com/security/cve/CVE-2016-1714
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 2016 Red Hat, Inc.
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