The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of Linux kernel: NULL pointer dereference via unregister_snap_client

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via unregister_snap_client of the Linux kernel, in order to trigger a denial of service.
Impacted systems: Debian, Linux, openSUSE Leap, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 1/4.
Creation date: 25/11/2019.
Références of this alert: CERTFR-2019-AVI-612, CERTFR-2019-AVI-639, CERTFR-2019-AVI-652, CERTFR-2020-AVI-029, CERTFR-2020-AVI-060, CERTFR-2020-AVI-096, CERTFR-2020-AVI-123, CERTFR-2020-AVI-130, CERTFR-2020-AVI-260, CVE-2019-19227, DLA-2068-1, DLA-2114-1, openSUSE-SU-2019:2675-1, SSA:2020-008-01, SUSE-SU-2019:3200-1, SUSE-SU-2019:3289-1, SUSE-SU-2019:3316-1, SUSE-SU-2019:3317-1, SUSE-SU-2019:3371-1, SUSE-SU-2019:3372-1, SUSE-SU-2019:3381-1, SUSE-SU-2020:0093-1, SUSE-SU-2020:0599-1, SUSE-SU-2020:14354-1, USN-4254-1, USN-4254-2, USN-4258-1, USN-4287-1, USN-4287-2, VIGILANCE-VUL-30953.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via unregister_snap_client of the Linux kernel, in order to trigger a denial of service.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

This security weakness impacts software or systems such as Debian, Linux, openSUSE Leap, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this threat bulletin is low.

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 threat.

Solutions for this threat 

Linux kernel: version 4.19.89.
The version 4.19.89 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.159.
The version 4.14.159 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.207.
The version 4.9.207 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.207.
The version 4.4.207 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 3.16.79.
The version 3.16.79 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v3.x/

Linux kernel: patch for unregister_snap_client.
A patch is indicated in information sources.

Debian 8: new linux-4.9 packages.
New packages are available:
  Debian 8: linux-4.9 4.9.210-1~deb8u1

Debian 8: new linux packages.
New packages are available:
  Debian 8: linux 3.16.81-1

openSUSE Leap 15.1: new kernel packages (13/12/2019).
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.36.1

Slackware 14.2: new kernel packages (09/01/2020).
New packages are available:
  Slackware 14.2: kernel 4.4.208-*-1

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.111.1

SUSE LE 12 SP4: new kernel-azure packages (18/12/2019).
New packages are available:
  SUSE LE 12 SP4: kernel-azure 4.12.14-6.34.1

SUSE LE 12 SP4: new kernel packages (20/12/2019).
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.45.1

SUSE LE 12 SP4: new kernel-rt packages.
New packages are available:
  SUSE LE 12 SP4: kernel-rt 4.12.14-8.12.1

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 RTM: new kernel-azure packages (13/12/2019).
New packages are available:
  SUSE LE 15 RTM: kernel-azure 4.12.14-5.47.1

SUSE LE 15 RTM: new kernel packages (23/12/2019).
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.47.1

SUSE LE 15 SP1: new kernel-azure packages (20/12/2019).
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.22.1

SUSE LE 15 SP1: new kernel packages (18/12/2019).
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.29.1

Ubuntu 18.04: new linux-image-5.0.0 packages (29/01/2020).
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gcp 5.0.0.1029.33

Ubuntu: new linux-image-4.15.0 packages (19/02/2020).
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.88.80
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.88.98
  Ubuntu 14.04 ESM: linux-image-azure 4.15.0.1069.55

Ubuntu: new linux-image-4.4.0 packages (28/01/2020).
New packages are available:
  Ubuntu 14.04 ESM: linux-image-generic-lts-xenial 4.4.0.173.152
  Ubuntu 16.04 LTS: linux-image-generic 4.4.0.173.181

Wind River Linux: version 10.17.41.19.
The version 10.17.41.19 is fixed.
This bulletin fixes more than 100 vulnerabilities, but only the 100 recent vulnerabilities were associated to this bulletin.

Wind River Linux: version 10.18.44.14.
The version 10.18.44.14 is fixed:
  https://support2.windriver.com/
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service 

Vigil@nce provides application vulnerability patches. The Vigil@nce computer vulnerability tracking service alerts your teams of vulnerabilities or threats impacting your information system.