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Red Hat Security Advisory 2019-1883-01

Red Hat Security Advisory 2019-1883-01
Posted Jul 29, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-1883-01 - Kernel-based Virtual Machine 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. Issues addressed include a buffer overflow vulnerability.

tags | advisory, overflow, kernel
systems | linux, redhat
advisories | CVE-2019-6778
SHA-256 | 6223a60a0fb394d6cc6ef8e3047e8d8b79646063a73ba0baf27648ff941c1b4f

Red Hat Security Advisory 2019-1883-01

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

Synopsis: Important: qemu-kvm security update
Advisory ID: RHSA-2019:1883-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:1883
Issue date: 2019-07-29
CVE Names: CVE-2019-6778
====================================================================
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):

* QEMU: slirp: heap buffer overflow in tcp_emu() (CVE-2019-6778)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

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/):

1664205 - CVE-2019-6778 QEMU: slirp: heap buffer overflow in tcp_emu()

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
qemu-kvm-1.5.3-160.el7_6.3.src.rpm

x86_64:
qemu-img-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-common-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-tools-1.5.3-160.el7_6.3.x86_64.rpm

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

Source:
qemu-kvm-1.5.3-160.el7_6.3.src.rpm

x86_64:
qemu-img-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-common-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-tools-1.5.3-160.el7_6.3.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
qemu-kvm-1.5.3-160.el7_6.3.src.rpm

x86_64:
qemu-img-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-common-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-tools-1.5.3-160.el7_6.3.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
qemu-kvm-1.5.3-160.el7_6.3.src.rpm

x86_64:
qemu-img-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-common-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-160.el7_6.3.x86_64.rpm
qemu-kvm-tools-1.5.3-160.el7_6.3.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-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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