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Vulnerability of Linux kernel: buffer overflow via ctnetlink_parse_tuple_filter

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via ctnetlink_parse_tuple_filter() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable products: Debian, Fedora, Linux, RHEL, Slackware, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 10/09/2020.
Références of this bulletin: CERTFR-2020-AVI-654, CERTFR-2020-AVI-699, CERTFR-2020-AVI-786, CERTFR-2021-AVI-005, CERTFR-2021-AVI-040, CVE-2020-25211, DLA-2417-1, DLA-2420-1, DLA-2420-2, DSA-4774-1, FEDORA-2020-3c6fedeb83, FEDORA-2020-5920a7a0b2, RHSA-2021:0003-01, RHSA-2021:0004-01, RHSA-2021:0184-01, RHSA-2021:0189-01, SSA:2020-295-01, USN-4657-1, USN-4658-1, USN-4658-2, USN-4660-1, USN-4660-2, VIGILANCE-VUL-33294.

Description of the vulnerability 

An attacker can trigger a buffer overflow via ctnetlink_parse_tuple_filter() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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This security threat impacts software or systems such as Debian, Fedora, Linux, RHEL, Slackware, Ubuntu.

Our Vigil@nce team determined that the severity of this computer weakness note 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 threat alert.

Solutions for this threat 

Linux kernel: version 5.8.13.
The version 5.8.13 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.70.
The version 5.4.70 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.150.
The version 4.19.150 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.201.
The version 4.14.201 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.239.
The version 4.9.239 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.239.
The version 4.4.239 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: patch for ctnetlink_parse_tuple_filter.
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 4.9.240-2

Fedora 31-32: new kernel packages.
New packages are available:
  Fedora 31: kernel 5.8.9-101.fc31
  Fedora 32: kernel 5.8.9-200.fc32

RHEL 8.1: new kernel packages.
New packages are available:
  RHEL 8.1: kernel 4.18.0-147.38.1.el8_1

RHEL 8.1: new kpatch-patch packages.
New packages are available:
  RHEL 8.1: kpatch-patch 4_18_0-147_13_2-1-6.el8_1

RHEL 8.3: new kernel packages.
New packages are available:
  RHEL 8.3: kernel 4.18.0-240.10.1.el8_3

RHEL 8.3: new kernel-rt packages.
New packages are available:
  RHEL 8.3: kernel-rt 4.18.0-240.10.1.rt7.64.el8_3

Slackware 14.2: new kernel packages (22/10/2020).
New packages are available:
  Slackware 14.2: kernel 4.4.240-i586-1

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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