ESB-2017.1962 - [RedHat] qemu-kvm: Denial of service - Remote/unauthenticated 2017-08-09

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1962
                    Moderate: qemu-kvm security update
                               9 August 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           qemu-kvm
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux WS/Desktop 7
                   Red Hat Enterprise Linux Server 7
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-10664  

Reference:         ESB-2017.1827

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2017:2445

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

Synopsis:          Moderate: qemu-kvm security update
Advisory ID:       RHSA-2017:2445-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:2445
Issue date:        2017-08-08
CVE Names:         CVE-2017-10664 
=====================================================================

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 Moderate. 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) - ppc64, ppc64le, 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 package provides the
user-space component for running virtual machines that use KVM.

Security Fix(es):

* Quick Emulator (QEMU) built with the Network Block Device (NBD) Server
support is vulnerable to a crash via a SIGPIPE signal. The crash can occur
if a client aborts a connection due to any failure during negotiation or
read operation. A remote user/process could use this flaw to crash the
qemu-nbd server resulting in a DoS. (CVE-2017-10664)

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/):

1466190 - CVE-2017-10664 Qemu: qemu-nbd: server breaks with SIGPIPE upon client abort

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
qemu-kvm-1.5.3-141.el7_4.1.src.rpm

x86_64:
qemu-img-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-common-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-tools-1.5.3-141.el7_4.1.x86_64.rpm

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

Source:
qemu-kvm-1.5.3-141.el7_4.1.src.rpm

x86_64:
qemu-img-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-common-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-tools-1.5.3-141.el7_4.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
qemu-kvm-1.5.3-141.el7_4.1.src.rpm

ppc64:
qemu-img-1.5.3-141.el7_4.1.ppc64.rpm
qemu-kvm-debuginfo-1.5.3-141.el7_4.1.ppc64.rpm

ppc64le:
qemu-img-1.5.3-141.el7_4.1.ppc64le.rpm
qemu-kvm-debuginfo-1.5.3-141.el7_4.1.ppc64le.rpm

x86_64:
qemu-img-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-common-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-tools-1.5.3-141.el7_4.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
qemu-kvm-1.5.3-141.el7_4.1.src.rpm

x86_64:
qemu-img-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-common-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-141.el7_4.1.x86_64.rpm
qemu-kvm-tools-1.5.3-141.el7_4.1.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-2017-10664
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2017 Red Hat, Inc.
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