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AUSCERT External Security Bulletin Redistribution
ESB-2018.2402
Important: qemu-kvm security and bug fix update
17 August 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: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-11806 CVE-2018-7550
Reference: ESB-2018.2395
ESB-2018.1620
ESB-2018.1507
ESB-2018.1443
Original Bulletin:
https://access.redhat.com/errata/RHSA-2018:2462
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Red Hat Security Advisory
Synopsis: Important: qemu-kvm security and bug fix update
Advisory ID: RHSA-2018:2462-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:2462
Issue date: 2018-08-16
CVE Names: CVE-2018-7550 CVE-2018-11806
=====================================================================
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 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@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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