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Vulnerability of Linux kernel: information disclosure via IPsec Tunnels Over IPv6

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via IPsec Tunnels Over IPv6 of the Linux kernel, in order to obtain sensitive information.
Vulnerable systems: Debian, Linux, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 2/4.
Creation date: 03/04/2020.
Références of this weakness: CERTFR-2020-AVI-186, CERTFR-2020-AVI-233, CERTFR-2020-AVI-243, CERTFR-2020-AVI-253, CERTFR-2020-AVI-356, CERTFR-2020-AVI-368, CERTFR-2020-AVI-548, CERTFR-2020-AVI-553, CERTFR-2020-AVI-574, CERTFR-2020-AVI-612, CERTFR-2020-AVI-672, CERTFR-2020-AVI-678, CVE-2020-1749, DLA-2241-1, DLA-2241-2, openSUSE-SU-2020:1325-1, RHBUG-1809833, RHSA-2020:1567-01, RHSA-2020:1769-01, RHSA-2020:1966-01, RHSA-2020:4060-01, RHSA-2020:4062-01, SSA:2020-163-01, SUSE-SU-2020:0868-1, SUSE-SU-2020:1049-1, SUSE-SU-2020:2540-1, SUSE-SU-2020:2541-1, SUSE-SU-2020:2574-1, SUSE-SU-2020:2575-1, SUSE-SU-2020:2610-1, SUSE-SU-2020:2623-1, SUSE-SU-2020:2999-1, SUSE-SU-2020:3014-1, USN-4388-1, USN-4390-1, USN-4391-1, VIGILANCE-VUL-31934.

Description of the vulnerability 

An attacker can bypass access restrictions to data via IPsec Tunnels Over IPv6 of the Linux kernel, in order to obtain sensitive information.
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This computer vulnerability announce impacts software or systems such as Debian, Linux, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of intranet server.

An attacker with a expert ability can exploit this threat alert.

Solutions for this threat 

Linux kernel: version 5.4.5.
The version 5.4.5 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.3.18.
The version 5.3.18 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.119.
The version 4.19.119 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.19.119.tar.xz

Linux kernel: version 4.14.181.
The version 4.14.181 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.14.181.tar.xz

Linux kernel: version 4.9.224.
The version 4.9.224 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.224.tar.xz

Linux kernel: version 4.4.224.
The version 4.4.224 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.4.224.tar.xz

Linux kernel: version 3.16.83.
The version 3.16.83 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v3.x/linux-3.16.83.tar.xz

Linux kernel: patch for IPsec Tunnels Over IPv6.
A patch is indicated in information sources.

Debian 8: new linux packages.
New packages are available:
  Debian 8: linux 3.16.84-1

openSUSE Leap 15.1: new kernel packages (03/09/2020).
New packages are available:
  openSUSE Leap 15.1: kernel debug-4.12.14-lp151.28.63.1

RHEL 7.8: new kernel packages.
New packages are available:
  RHEL 7.0-7.8: kernel 3.10.0-1160.el7

RHEL 7.8: new kernel-rt packages.
New packages are available:
  RHEL 7.0-7.8: kernel-rt 3.10.0-1160.rt56.1131.el7

RHEL 8: new kernel packages.
New packages are available:
  RHEL 8.0-8.1: kernel 4.18.0-193.el8

RHEL 8: new kernel-rt packages.
New packages are available:
  RHEL 8.0-8.1: kernel-rt 4.18.0-193.rt13.51.el8

Slackware 14.2: new kernel packages.
New packages are available:
  Slackware 14.2: kernel 4.4.227-i586-1

SUSE LE 12 SP4: new kernel packages.
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.60.1

SUSE LE 12 SP5: new kernel-azure packages (07/09/2020).
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.25.1

SUSE LE 12 SP5: new kernel packages (08/09/2020).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.37.1

SUSE LE 12 SP5: new kerne-rt packages.
New packages are available:
  SUSE LE 12 SP5: kernel-rt 4.12.14-10.19.1

SUSE LE 15 RTM: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.58.1

SUSE LE 15 SP1: new kernel-azure packages.
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.41.1

SUSE LE 15 SP1: new kernel-livepatch packages.
New packages are available:
  SUSE LE 15 SP1: kernel-livepatch 4_12_14-197_37-default-2-2.2

SUSE LE 15 SP1: new kernel packages.
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.56.1

SUSE LE 15 SP1: new kernel-rt packages (23/10/2020).
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.36.1

SUSE LE: new kgraft-patch packages.
New packages are available:
  SUSE LE 12 SP1: kgraft-patch 3_12_74-60_64_110-default-9-2.1
  SUSE LE 12 SP2: kgraft-patch 4_4_121-92_104-default-9-2.1
  SUSE LE 12 SP3: kgraft-patch 4_4_176-94_88-default-8-2.1
  SUSE LE 15 RTM: kernel-livepatch 4_12_14-150_14-default-8-2.1
  SUSE LE 15 SP1: kernel-livepatch 4_12_14-195-default-10-28.2

Ubuntu 18.04: new linux-gke-5.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gke-5.0 5.0.0.1042.27

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.106.94
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.106.111

Ubuntu: new linux-image-4.4.0 packages.
New packages are available:
  Ubuntu 16.04 LTS: linux-image-generic 4.4.0.184.190
  Ubuntu 14.04 ESM: linux-image-generic-lts-xenial 4.4.0.184.161
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