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Vulnerability of Xen: denial of service via Shadow Paging

Synthesis of the vulnerability 

An attacker, inside a guest system, can generate a fatal error via Shadow Paging of Xen, in order to trigger a denial of service on the host system.
Vulnerable software: Debian, Fedora, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Xen.
Severity of this announce: 2/4.
Creation date: 21/11/2018.
Références of this computer vulnerability: CERTFR-2018-AVI-566, CVE-2018-19966, DLA-1949-1, DSA-4369-1, FEDORA-2018-2fde555d91, FEDORA-2019-3e89502cb1, FEDORA-2019-bce6498890, openSUSE-SU-2018:4111-1, openSUSE-SU-2018:4304-1, openSUSE-SU-2019:1226-1, SUSE-SU-2018:4070-1, SUSE-SU-2018:4300-1, SUSE-SU-2019:0003-1, SUSE-SU-2019:0020-1, SUSE-SU-2019:0825-1, SUSE-SU-2019:0827-1, SUSE-SU-2019:13921-1, SUSE-SU-2019:14011-1, VIGILANCE-VUL-27847, XSA-280.

Description of the vulnerability 

An attacker, inside a guest system, can generate a fatal error via Shadow Paging of Xen, in order to trigger a denial of service on the host system.
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This cybersecurity announce impacts software or systems such as Debian, Fedora, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Xen.

Our Vigil@nce team determined that the severity of this threat alert is medium.

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

An attacker with a expert ability can exploit this computer weakness alert.

Solutions for this threat 

Xen: version 4.10.3.
The version 4.10.3 is fixed:
  http://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=refs/heads/stable-4.10

Xen: version 4.9.4.
The version 4.9.4 is fixed:
  http://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=refs/heads/stable-4.9

Xen: patch for Shadow Paging.
A patch is available:
  https://xenbits.xen.org/xsa/xsa280-1.patch
  https://xenbits.xen.org/xsa/xsa280-2.patch
  https://xenbits.xen.org/xsa/xsa280-4.7-2.patch
  https://xenbits.xen.org/xsa/xsa280-4.9-1.patch
  https://xenbits.xen.org/xsa/xsa280-4.10-2.patch
  https://xenbits.xen.org/xsa/xsa280-4.11-2.patch

Debian 8: new xen packages.
New packages are available:
  Debian 8: xen 4.4.4lts5-0+deb8u1

Debian 9: new xen packages.
New packages are available:
  Debian 9: xen 4.8.5+shim4.10.2+xsa282-1+deb9u11

Fedora 28: new xen packages.
New packages are available:
  Fedora 28: xen 4.10.3-2.fc28

Fedora 29: new xen packages.
New packages are available:
  Fedora 29: xen 4.11.1-4.fc29

openSUSE Leap 15.0: new xen packages (31/12/2018).
New packages are available:
  openSUSE Leap 15.0: xen 4.10.2_04-lp150.2.12.1

openSUSE Leap 42.3: new xen packages (13/12/2018).
New packages are available:
  openSUSE Leap 42.3: xen 4.9.3_03-34.1

openSUSE Leap 42.3: new xen packages (18/04/2019).
New packages are available:
  openSUSE Leap 42.3: xen 4.9.4_02-37.1

SUSE LE 11 SP3: new xen packages.
New packages are available:
  SUSE LE 11 SP3: xen 4.2.5_21-45.30.1

SUSE LE 11 SP4: new xen packages (03/01/2019).
New packages are available:
  SUSE LE 11 SP4: xen 4.4.4_38-61.40.1

SUSE LE 12 RTM: new xen packages (01/04/2019).
New packages are available:
  SUSE LE 12 RTM: xen 4.4.4_40-22.77.1

SUSE LE 12 SP1: new xen packages (01/04/2019).
New packages are available:
  SUSE LE 12 SP1: xen 4.5.5_28-22.58.1

SUSE LE 12 SP2: new xen packages.
New packages are available:
  SUSE LE 12 SP2: xen 4.7.6_05-43.45.1

SUSE LE 12 SP3: new xen packages.
New packages are available:
  SUSE LE 12 SP3: xen 4.9.3_03-3.47.1

SUSE LE 12 SP4: new xen packages.
New packages are available:
  SUSE LE 12 SP4: xen 4.11.1_02-2.3.1

SUSE LE 15: new xen packages (31/12/2018).
New packages are available:
  SUSE LE 15 RTM: xen 4.10.2_04-3.9.1
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