[RHSA-2018:2462-01] Important: qemu-kvm security and bug fix update

Thu Aug 16 14:18:28 UTC 2018

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 while reassembling fragmented datagrams
(CVE-2018-11806)

* QEMU: i386: multiboot OOB access while loading kernel image
(CVE-2018-7550)

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

Red Hat would like to thank Jskz - Zero Day Initiative (trendmicro.com) for
reporting CVE-2018-11806 and Cyrille Chatras (Orange.com) and CERT-CC
(Orange.com) for reporting CVE-2018-7550.

Bug Fix(es):

* Previously, live migrating a Windows guest in some cases caused the guest
to become unresponsive. This update ensures that Real-time Clock (RTC)
interrupts are not missed, which prevents the problem from occurring.
(BZ#1596302)

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/):

1549798 - CVE-2018-7550 QEMU: i386: multiboot OOB access while loading kernel image
1586245 - CVE-2018-11806 QEMU: slirp: heap buffer overflow while reassembling fragmented datagrams

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
qemu-kvm-1.5.3-156.el7_5.5.src.rpm

x86_64:
qemu-img-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-common-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-tools-1.5.3-156.el7_5.5.x86_64.rpm

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

Source:
qemu-kvm-1.5.3-156.el7_5.5.src.rpm

x86_64:
qemu-img-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-common-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-tools-1.5.3-156.el7_5.5.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
qemu-kvm-1.5.3-156.el7_5.5.src.rpm

x86_64:
qemu-img-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-common-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-tools-1.5.3-156.el7_5.5.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
qemu-kvm-1.5.3-156.el7_5.5.src.rpm

x86_64:
qemu-img-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-common-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-156.el7_5.5.x86_64.rpm
qemu-kvm-tools-1.5.3-156.el7_5.5.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-2018-7550
https://access.redhat.com/security/cve/CVE-2018-11806
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2018 Red Hat, Inc.
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