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Vulnerability of QEMU: out-of-bounds memory reading via cirrus_vga_rop

Synthesis of the vulnerability 

An attacker, inside a guest system, can force a read at an invalid address via cirrus_vga_rop() of QEMU, in order to trigger a denial of service, or to obtain sensitive information on the host system.
Vulnerable systems: Debian, Fedora, openSUSE Leap, QEMU, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 1/4.
Creation date: 19/04/2017.
Références of this weakness: CVE-2017-7718, DLA-1035-1, DLA-1497-1, DLA-939-1, FEDORA-2017-f941184db1, openSUSE-SU-2017:1221-1, openSUSE-SU-2017:1872-1, RHSA-2017:1206-01, RHSA-2017:1430-01, SUSE-SU-2017:1143-1, SUSE-SU-2017:1145-1, SUSE-SU-2017:1146-1, SUSE-SU-2017:1147-1, SUSE-SU-2017:1148-1, SUSE-SU-2017:1774-1, SUSE-SU-2017:2946-1, SUSE-SU-2017:2963-1, SUSE-SU-2017:2969-1, SUSE-SU-2017:3084-1, USN-3289-1, VIGILANCE-VUL-22502.

Description of the vulnerability 

An attacker, inside a guest system, can force a read at an invalid address via cirrus_vga_rop() of QEMU, in order to trigger a denial of service, or to obtain sensitive information on the host system.
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This security alert impacts software or systems such as Debian, Fedora, openSUSE Leap, QEMU, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this security weakness is low.

The trust level is of type confirmed by the editor, with an origin of privileged shell.

An attacker with a expert ability can exploit this security announce.

Solutions for this threat 

QEMU: patch for cirrus_vga_rop.
A patch is indicated in information sources.

Debian 7: new qemu-kvm packages.
New packages are available:
  Debian 7: qemu-kvm 1.1.2+dfsg-6+deb7u21

Debian 7: new qemu packages.
New packages are available:
  Debian 7: qemu 1.1.2+dfsg-6+deb7u22

Debian 8: new qemu packages.
New packages are available:
  Debian 8: qemu 1:2.1+dfsg-12+deb8u7

Fedora 25: new qemu packages.
New packages are available:
  Fedora 25: qemu 2.7.1-7.fc25

openSUSE Leap 42.2: new qemu packages (17/07/2017).
New packages are available:
  openSUSE Leap 42.2: qemu 2.6.2-31.3.3

openSUSE Leap 42.2: new xen packages (09/05/2017).
New packages are available:
  openSUSE Leap 42.2: xen 4.7.2_04-11.6.1

RHEL 6.9: new qemu-kvm packages.
New packages are available:
  RHEL 6: qemu-kvm 0.12.1.2-2.503.el6_9.3

RHEL: new qemu-kvm packages.
New packages are available:
  RHEL 7: qemu-kvm 1.5.3-126.el7_3.9

SUSE LE 11 SP3: new kvm packages.
New packages are available:
  SUSE LE 11 SP3: kvm 1.4.2-53.11.1

SUSE LE 11 SP3: new xen packages.
New packages are available:
  SUSE LE 11 SP3: xen 4.2.5_21-41.1

SUSE LE 11 SP4: new kvm packages.
New packages are available:
  SUSE LE 11 SP4: kvm 1.4.2-60.3.1

SUSE LE 11 SP4: new xen packages.
New packages are available:
  SUSE LE 11 SP4: xen 4.4.4_18-57.1

SUSE LE 12 RTM: new qemu packages.
New packages are available:
  SUSE LE 12 RTM: qemu 2.0.2-48.34.3

SUSE LE 12 RTM: new xen packages.
New packages are available:
  SUSE LE 12 RTM: xen 4.4.4_18-22.39.1

SUSE LE 12 SP1: new qemu packages (08/11/2017).
New packages are available:
  SUSE LE 12 SP1: qemu 2.3.1-33.3.3

SUSE LE 12 SP1: new xen packages.
New packages are available:
  SUSE LE 12 SP1: xen 4.5.5_10-22.14.1

SUSE LE 12 SP2: new qemu packages (05/07/2017).
New packages are available:
  SUSE LE 12 SP2: qemu 2.6.2-41.16.1

SUSE LE 12 SP2: new xen packages (03/05/2017).
New packages are available:
  SUSE LE 12 SP2: xen 4.7.2_04-39.1

Ubuntu: new qemu-system packages.
New packages are available:
  Ubuntu 17.04: qemu-system 1:2.8+dfsg-3ubuntu2.2
  Ubuntu 16.10: qemu-system 1:2.6.1+dfsg-0ubuntu5.5
  Ubuntu 16.04 LTS: qemu-system 1:2.5+dfsg-5ubuntu10.14
  Ubuntu 14.04 LTS: qemu-system 2.0.0+dfsg-2ubuntu1.34
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