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Red Hat Security Advisory 2019-1968-01

Red Hat Security Advisory 2019-1968-01
Posted Jul 30, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-1968-01 - KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. Issues addressed include a buffer overflow vulnerability.

tags | advisory, overflow
systems | linux, redhat
advisories | CVE-2018-20815, CVE-2019-6778
MD5 | 9935fe560f7a9fd7adb47185aca23414

Red Hat Security Advisory 2019-1968-01

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

Synopsis: Important: qemu-kvm-rhev security and bug fix update
Advisory ID: RHSA-2019:1968-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2019:1968
Issue date: 2019-07-30
CVE Names: CVE-2018-20815 CVE-2019-6778
=====================================================================

1. Summary:

An update for qemu-kvm-rhev is now available for Red Hat Virtualization for
Red Hat Virtualization Host 7.

Red Hat Product Security has rated this update as having a Important
security impact. 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:

RHV-M 4.2 - x86_64
RHV-M 4.3 - x86_64
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts - ppc64le, x86_64

3. Description:

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

Security Fix(es):

* CVE-2018-20815 QEMU: device_tree: heap buffer overflow while loading
device tree blob

* CVE-2019-6778 QEMU: slirp: heap buffer overflow in tcp_em

This update fixes the following bug:

* 1705364 RHV VM pauses when 'dd' issued inside guest to a direct lun
configured as virtio-scsi with scsi-passthrough

Users of qemu-kvm are advised to upgrade to these updated packages. 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/2974891

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

1664205 - CVE-2019-6778 QEMU: slirp: heap buffer overflow in tcp_emu()
1693101 - CVE-2018-20815 QEMU: device_tree: heap buffer overflow while loading device tree blob

6. Package List:

Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts:

Source:
qemu-kvm-rhev-2.12.0-18.el7_6.7.src.rpm

ppc64le:
qemu-img-rhev-2.12.0-18.el7_6.7.ppc64le.rpm
qemu-kvm-common-rhev-2.12.0-18.el7_6.7.ppc64le.rpm
qemu-kvm-rhev-2.12.0-18.el7_6.7.ppc64le.rpm
qemu-kvm-rhev-debuginfo-2.12.0-18.el7_6.7.ppc64le.rpm
qemu-kvm-tools-rhev-2.12.0-18.el7_6.7.ppc64le.rpm

x86_64:
qemu-img-rhev-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-common-rhev-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-rhev-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-rhev-debuginfo-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-tools-rhev-2.12.0-18.el7_6.7.x86_64.rpm

RHV-M 4.2:

Source:
qemu-kvm-rhev-2.12.0-18.el7_6.7.src.rpm

x86_64:
qemu-img-rhev-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-common-rhev-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-rhev-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-rhev-debuginfo-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-tools-rhev-2.12.0-18.el7_6.7.x86_64.rpm

RHV-M 4.3:

Source:
qemu-kvm-rhev-2.12.0-18.el7_6.7.src.rpm

x86_64:
qemu-img-rhev-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-common-rhev-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-rhev-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-rhev-debuginfo-2.12.0-18.el7_6.7.x86_64.rpm
qemu-kvm-tools-rhev-2.12.0-18.el7_6.7.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-2018-20815
https://access.redhat.com/security/cve/CVE-2019-6778
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 2019 Red Hat, Inc.
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