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Vulnerability of Linux kernel: buffer overflow via vhost/vhost_net

Synthesis of the vulnerability 

An attacker, inside a guest system, can trigger a buffer overflow via vhost/vhost_net of the Linux kernel, in order to trigger a denial of service, and possibly to run code on the host system.
Vulnerable software: Debian, Fedora, Junos Space, Linux, openSUSE Leap, oVirt, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this announce: 2/4.
Creation date: 17/09/2019.
Revision date: 25/09/2019.
Références of this computer vulnerability: CERTFR-2019-AVI-448, CERTFR-2019-AVI-451, CERTFR-2019-AVI-455, CERTFR-2019-AVI-457, CERTFR-2019-AVI-466, CERTFR-2019-AVI-467, CERTFR-2019-AVI-502, CERTFR-2019-AVI-503, CERTFR-2019-AVI-530, CERTFR-2019-AVI-561, CERTFR-2019-AVI-575, CERTFR-2019-AVI-612, CERTFR-2020-AVI-029, CVE-2019-14835, DLA-1930-1, DLA-1940-1, DSA-4531-1, FEDORA-2019-a570a92d5a, FEDORA-2019-e3010166bd, JSA10993, openSUSE-SU-2019:2173-1, openSUSE-SU-2019:2181-1, RHSA-2019:2827-01, RHSA-2019:2828-01, RHSA-2019:2829-01, RHSA-2019:2830-01, RHSA-2019:2854-01, RHSA-2019:2862-01, RHSA-2019:2863-01, RHSA-2019:2864-01, RHSA-2019:2865-01, RHSA-2019:2866-01, RHSA-2019:2867-01, RHSA-2019:2869-01, RHSA-2019:2899-01, RHSA-2019:2900-01, RHSA-2019:2901-01, SSA:2019-311-01, SUSE-SU-2019:14218-1, SUSE-SU-2019:2412-1, SUSE-SU-2019:2424-1, SUSE-SU-2019:2648-1, SUSE-SU-2019:2651-1, SUSE-SU-2019:2658-1, SUSE-SU-2019:2738-1, SUSE-SU-2019:2949-1, SUSE-SU-2019:2950-1, SUSE-SU-2019:2984-1, SUSE-SU-2019:3200-1, SUSE-SU-2020:0093-1, USN-4135-1, USN-4135-2, VIGILANCE-VUL-30355.

Description of the vulnerability 

An attacker, inside a guest system, can trigger a buffer overflow via vhost/vhost_net of the Linux kernel, in order to trigger a denial of service, and possibly to run code on the host system.
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This cybersecurity announce impacts software or systems such as Debian, Fedora, Junos Space, Linux, openSUSE Leap, oVirt, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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 document.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a specialist ability can exploit this computer weakness alert.

Solutions for this threat 

Linux kernel: version 4.9.193.
The version 4.9.193 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.193.
The version 4.4.193 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 3.16.74.
The version 3.16.74 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v3.x/linux-3.16.74.tar.xz

Linux kernel: patch for vhost/vhost_net.
A patch is indicated in information sources.

Debian 8: new linux-4.9 packages.
New packages are available:
  Debian 8: linux-4.9 4.9.189-3+deb9u1~deb8u1

Debian 8: new linux packages.
New packages are available:
  Debian 8: linux 3.16.74-1

Debian 9, 10: new linux packages.
New packages are available:
  Debian 9: linux 4.9.189-3+deb9u1
  Debian 10: linux 4.19.67-2+deb10u1

Fedora 29: new kernel-headers packages.
New packages are available:
  Fedora 29: kernel-headers 5.2.17-100.fc29

Fedora 29: new kernel packages.
New packages are available:
  Fedora 29: kernel 5.2.17-100.fc29

Fedora 29: new kernel-tools packages.
New packages are available:
  Fedora 29: kernel-tools 5.2.17-100.fc29

Fedora 30: new kernel-headers packages.
New packages are available:
  Fedora 30: kernel-headers 5.2.15-200.fc30

Fedora 30: new kernel packages.
New packages are available:
  Fedora 30: kernel 5.2.15-200.fc30

Junos Space: version 19.4R1.
The version 19.4R1 is fixed:
  https://www.juniper.net/support/downloads/

openSUSE Leap 15: new kernel packages.
New packages are available:
  openSUSE Leap 15.0: kernel 4.12.14-lp150.12.73.1
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.16.1

oVirt: version 4.3.6.
The version 4.3.6 is fixed.

RHEL 6.5: new kernel packages.
New packages are available:
  RHEL 6: kernel 2.6.32-431.96.2.el6

RHEL 7.2: new kernel packages.
New packages are available:
  RHEL 7: kernel 3.10.0-327.82.1.el7

RHEL 7.3: new kernel packages.
New packages are available:
  RHEL 7: kernel 3.10.0-514.69.1.el7

RHEL 7, 8: new kernel-rt packages.
New packages are available:
  RHEL 8: kernel-rt 4.18.0-80.11.2.rt9.157.el8_0
  RHEL 7: kernel-rt 3.10.0-1062.1.2.rt56.1025.el7

RHEL 7: new kernel-alt packages.
New packages are available:
  RHEL 7: kernel-alt 4.14.0-115.13.1.el7a

RHEL 7: new kpatch-patch packages.
New packages are available:
  RHEL 7: kpatch-patch 3_10_0-1062-1-1.el7
  RHEL 7.6: kpatch-patch 3_10_0-957_35_1-1-1.el7

RHEL: new kernel packages.
New packages are available:
  RHEL 8: kernel 4.18.0-80.11.2.el8_0
  RHEL 7: kernel 3.10.0-1062.1.2.el7
  RHEL 7.6: kernel 3.10.0-957.35.2.el7
  RHEL 7.5: kernel 3.10.0-862.41.2.el7
  RHEL 7.4: kernel 3.10.0-693.59.1.el7
  RHEL 6: kernel 2.6.32-754.23.1.el6
  RHEL 6.6: kernel 2.6.32-504.81.2.el6

Slackware 14.2: new kernel packages.
New packages are available:
  Slackware 14.2: kernel 4.4.199-*-1

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.108.1

SUSE LE 12 SP1: new kernel packages (13/11/2019).
New packages are available:
  SUSE LE 12 SP1: kernel 3.12.74-60.64.124.1

SUSE LE 12 SP2: new kernel packages.
New packages are available:
  SUSE LE 12 SP2: kernel 4.4.121-92.125.1

SUSE LE 12 SP3: new kernel packages (13/11/2019).
New packages are available:
  SUSE LE 12 SP3: kernel 4.4.180-94.107.1

SUSE LE 12 SP4: new kernel-azure packages.
New packages are available:
  SUSE LE 12 SP4: kernel-azure 4.12.14-6.26.1

SUSE LE 12 SP4: new kernel-default packages.
New packages are available:
  SUSE LE 12 SP4: kernel-default 4.12.14-95.32.1

SUSE LE 12 SP5: new kernel-azure packages (15/01/2020).
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.7.1

SUSE LE 12 SP5: new kernel packages (09/12/2019).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.7.1

SUSE LE 15: new kernel-azure packages.
New packages are available:
  SUSE LE 15 RTM: kernel-azure 4.12.14-5.41.1
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.16.1

SUSE LE 15 SP1: new kernel-default packages.
New packages are available:
  SUSE LE 15 SP1: kernel-default 4.12.14-197.18.1

SUSE LE 15 SP1: new kernel-rt packages.
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.11.1

Ubuntu: new linux-image packages.
New packages are available:
  Ubuntu 19.04: linux-image-5.0.0-29-generic 5.0.0-29.31
  Ubuntu 18.04 LTS: linux-image-4.15.0-64-generic 4.15.0-64.73
  Ubuntu 16.04 LTS: linux-image-4.4.0-164-generic 4.4.0-164.192
  Ubuntu 14.04 ESM: linux-image-3.13.0-173-generic 3.13.0-173.224, linux-image-4.4.0-164-generic 4.4.0-164.192~14.04.1, linux-image-generic 3.13.0.173.184
  Ubuntu 12.04 ESM: linux-image-3.13.0-173-generic 3.13.0-173.224~12.04.1, linux-image-3.2.0-143-generic 3.2.0-143.190, linux-image-generic 3.2.0.143.158

Wind River Linux: version 10.17.41.19.
The version 10.17.41.19 is fixed.

Wind River Linux: version 10.18.44.12.
The version 10.18.44.12 is fixed:
  https://support2.windriver.com/
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