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Vulnerability of Linux kernel: information disclosure via IPsec Unencrypted GENEVE Tunnels

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via IPsec Unencrypted GENEVE Tunnels of the Linux kernel, in order to obtain sensitive information.
Vulnerable products: Debian, Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 14/10/2020.
Références of this bulletin: CERTFR-2020-AVI-654, CERTFR-2020-AVI-661, CERTFR-2020-AVI-668, CERTFR-2020-AVI-672, CERTFR-2020-AVI-678, CERTFR-2020-AVI-699, CERTFR-2020-AVI-719, CERTFR-2020-AVI-741, CERTFR-2020-AVI-764, CERTFR-2020-AVI-769, CERTFR-2020-AVI-776, CERTFR-2020-AVI-784, CERTFR-2020-AVI-786, CERTFR-2020-AVI-834, CERTFR-2021-AVI-201, CERTFR-2021-AVI-265, CVE-2020-25645, DLA-2417-1, DLA-2494-1, DSA-4774-1, openSUSE-SU-2020:1682-1, openSUSE-SU-2020:1698-1, openSUSE-SU-2020:2112-1, openSUSE-SU-2021:0242-1, RHBUG-1883988, RHSA-2021:0856-01, RHSA-2021:0857-01, SUSE-SU-2020:2972-1, SUSE-SU-2020:2980-1, SUSE-SU-2020:2981-1, SUSE-SU-2020:2999-1, SUSE-SU-2020:3014-1, SUSE-SU-2020:3230-1, SUSE-SU-2020:3281-1, SUSE-SU-2020:3484-1, SUSE-SU-2020:3491-1, SUSE-SU-2020:3501-1, SUSE-SU-2020:3503-1, SUSE-SU-2020:3532-1, SUSE-SU-2020:3544-1, USN-4657-1, USN-4658-1, USN-4658-2, USN-4660-1, USN-4660-2, USN-4912-1, VIGILANCE-VUL-33570.

Description of the vulnerability 

An attacker can bypass access restrictions to data via IPsec Unencrypted GENEVE Tunnels of the Linux kernel, in order to obtain sensitive information.
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This threat alert impacts software or systems such as Debian, Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

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

An attacker with a expert ability can exploit this weakness note.

Solutions for this threat 

Linux kernel: version 5.8.12.
The version 5.8.12 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.68.
The version 5.4.68 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.148.
The version 4.19.148 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.200.
The version 4.14.200 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.244.
The version 4.9.244 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.244.
The version 4.4.244 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: patch for IPsec Unencrypted GENEVE Tunnels.
A patch is indicated in information sources.

Debian 10: new linux packages.
New packages are available:
  Debian 10: linux 4.19.152-1

Debian 9: new linux-4.19 packages.
New packages are available:
  Debian 9: linux-4.19 4.19.152-1~deb9u1

Debian 9: new linux packages.
New packages are available:
  Debian 9: linux 4.9.246-2

openSUSE Leap 15.1: new kernel packages (19/10/2020).
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.75.1

openSUSE Leap 15.2: new kernel packages (20/10/2020).
New packages are available:
  openSUSE Leap 15.2: kernel 5.3.18-lp152.47.2

openSUSE Leap 15.2: new kernel packages (30/11/2020).
New packages are available:
  openSUSE Leap 15.2: kernel 5.3.18-lp152.50.1.lp152.8.10.1

openSUSE Leap 15.2: new kernel-rt packages.
New packages are available:
  openSUSE Leap 15.2: kernel-rt 5.3.18-lp152.3.5.1

RHEL 7.9: new kernel packages.
New packages are available:
  RHEL 7.9: kernel 3.10.0-1160.21.1.el7

RHEL 7.9: new kernel-rt packages.
New packages are available:
  RHEL 7.9: kernel-rt 3.10.0-1160.21.1.rt56.1158.el7

SUSE LE 12 SP2: new kernel-default packages.
New packages are available:
  SUSE LE 12 SP2: kernel-default 4.4.121-92.146.1
  SUSE LE 12 SP2: kernel-default 4.4.121-92.146.1

SUSE LE 12 SP3: new kernel-default packages.
New packages are available:
  SUSE LE 12 SP3: kernel-default 4.4.180-94.135.1

SUSE LE 12 SP4: new kernel-default packages.
New packages are available:
  SUSE LE 12 SP4: kernel-default 4.12.14-95.65.1

SUSE LE 12 SP5: new kernel-azure packages.
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.34.1

SUSE LE 12 SP5: new kernel packages (22/10/2020).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.46.1

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: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel-default-livepatch 4.12.14-150.63.1, kernel-livepatch 4_12_14-150_63-default-1-1.5.1

SUSE LE 15 SP1: new kernel-azure packages (24/11/2020).
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.52.1

SUSE LE 15 SP1: new kernel packages.
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.64.1

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 15 SP2: new kernel-azure packages (24/11/2020).
New packages are available:
  SUSE LE 15 SP2: kernel-azure 5.3.18-18.24.1

SUSE LE 15 SP2: new kernel packages.
New packages are available:
  SUSE LE 15 SP2: kernel 5.3.18-24.29.2

SUSE LE 15 SP2: new kernel-rt packages.
New packages are available:
  SUSE LE 15 SP2: kernel-rt 5.3.18-13.1

Ubuntu 20.04: new linux-image-oem-20.04 packages.
New packages are available:
  Ubuntu 20.04 LTS: linux-image-oem-20.04 5.6.0.1053.49

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 14.04 ESM: linux-image-azure 4.15.0.1100.75
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.128.127
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.128.115

Ubuntu: new linux-image-4.4.0 packages (02/12/2020).
New packages are available:
  Ubuntu 14.04 ESM: linux-image-generic-lpae-lts-xenial 4.4.0.197.172
  Ubuntu 16.04 LTS: linux-image-generic 4.4.0.197.203

Ubuntu: new linux-image-5.4.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.4.0.58.64~18.04.53
  Ubuntu 20.04 LTS: linux-image-generic 5.4.0.58.61
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