ESB-2018.1507 - [Ubuntu] qemu: Multiple vulnerabilities 2018-05-17

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

                               ESB-2018.1507
                  QEMU vulnerabilities patched in Ubuntu
                                17 May 2018

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

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

Product:           qemu
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-7858 CVE-2018-7550 CVE-2017-16845

Reference:         ESB-2018.1484
                   ESB-2018.1443
                   ESB-2018.1428.4
                   ESB-2018.0812

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3649-1

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==========================================================================
Ubuntu Security Notice USN-3649-1
May 16, 2018

qemu vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- - Ubuntu 18.04 LTS
- - Ubuntu 17.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in QEMU.

Software Description:
- - qemu: Machine emulator and virtualizer

Details:

Cyrille Chatras discovered that QEMU incorrectly handled certain PS2 values
during migration. An attacker could possibly use this issue to cause QEMU
to crash, resulting in a denial of service, or possibly execute arbitrary
code. This issue only affected Ubuntu 18.04 LTS. (CVE-2017-16845)

Cyrille Chatras discovered that QEMU incorrectly handled multiboot. An
attacker could use this issue to cause QEMU to crash, resulting in a denial
of service, or possibly execute arbitrary code on the host. In the default
installation, when QEMU is used with libvirt, attackers would be isolated
by the libvirt AppArmor profile. (CVE-2018-7550)

Ross Lagerwall discovered that QEMU incorrectly handled the Cirrus VGA
device. A privileged attacker inside the guest could use this issue to
cause QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 17.10 and Ubuntu 18.04 LTS. (CVE-2018-7858)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
  qemu-system                     1:2.11+dfsg-1ubuntu7.1
  qemu-system-arm                 1:2.11+dfsg-1ubuntu7.1
  qemu-system-mips                1:2.11+dfsg-1ubuntu7.1
  qemu-system-ppc                 1:2.11+dfsg-1ubuntu7.1
  qemu-system-s390x               1:2.11+dfsg-1ubuntu7.1
  qemu-system-sparc               1:2.11+dfsg-1ubuntu7.1
  qemu-system-x86                 1:2.11+dfsg-1ubuntu7.1

Ubuntu 17.10:
  qemu-system                     1:2.10+dfsg-0ubuntu3.6
  qemu-system-aarch64             1:2.10+dfsg-0ubuntu3.6
  qemu-system-arm                 1:2.10+dfsg-0ubuntu3.6
  qemu-system-mips                1:2.10+dfsg-0ubuntu3.6
  qemu-system-ppc                 1:2.10+dfsg-0ubuntu3.6
  qemu-system-s390x               1:2.10+dfsg-0ubuntu3.6
  qemu-system-sparc               1:2.10+dfsg-0ubuntu3.6
  qemu-system-x86                 1:2.10+dfsg-0ubuntu3.6

Ubuntu 16.04 LTS:
  qemu-system                     1:2.5+dfsg-5ubuntu10.28
  qemu-system-aarch64             1:2.5+dfsg-5ubuntu10.28
  qemu-system-arm                 1:2.5+dfsg-5ubuntu10.28
  qemu-system-mips                1:2.5+dfsg-5ubuntu10.28
  qemu-system-ppc                 1:2.5+dfsg-5ubuntu10.28
  qemu-system-s390x               1:2.5+dfsg-5ubuntu10.28
  qemu-system-sparc               1:2.5+dfsg-5ubuntu10.28
  qemu-system-x86                 1:2.5+dfsg-5ubuntu10.28

Ubuntu 14.04 LTS:
  qemu-system                     2.0.0+dfsg-2ubuntu1.41
  qemu-system-aarch64             2.0.0+dfsg-2ubuntu1.41
  qemu-system-arm                 2.0.0+dfsg-2ubuntu1.41
  qemu-system-mips                2.0.0+dfsg-2ubuntu1.41
  qemu-system-ppc                 2.0.0+dfsg-2ubuntu1.41
  qemu-system-sparc               2.0.0+dfsg-2ubuntu1.41
  qemu-system-x86                 2.0.0+dfsg-2ubuntu1.41

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

References:
  https://usn.ubuntu.com/usn/usn-3649-1
  CVE-2017-16845, CVE-2018-7550, CVE-2018-7858

Package Information:
  https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.1
  https://launchpad.net/ubuntu/+source/qemu/1:2.10+dfsg-0ubuntu3.6
  https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu10.28
  https://launchpad.net/ubuntu/+source/qemu/2.0.0+dfsg-2ubuntu1.41

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