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Vulnerability of Docker Engine: privilege escalation via Chroot Nsswitch

Synthesis of the vulnerability 

An attacker can bypass restrictions via Chroot Nsswitch of Docker Engine, in order to escalate his privileges.
Vulnerable systems: Debian, Docker CE, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.
Severity of this threat: 2/4.
Creation date: 26/07/2019.
Références of this weakness: CVE-2019-14271, DSA-4521-1, openSUSE-SU-2019:2021-1, SUSE-SU-2019:2117-1, SUSE-SU-2019:2119-1, VIGILANCE-VUL-29894.

Description of the vulnerability 

An attacker can bypass restrictions via Chroot Nsswitch of Docker Engine, in order to escalate his privileges.
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This security alert impacts software or systems such as Debian, Docker CE, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this security weakness is medium.

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

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

Solutions for this threat 

Docker Engine: version 19.03.8.
The version 19.03.8 is fixed:
  https://www.docker.com/

Debian 10: new docker.io packages.
New packages are available:
  Debian 10: docker.io 18.09.1+dfsg1-7.1+deb10u1

openSUSE Leap 15: new containerd packages.
New packages are available:
  openSUSE Leap 15.0: containerd 1.2.6-lp150.4.17.1, docker 19.03.1_ce-lp150.5.27.1
  openSUSE Leap 15.1: containerd 1.2.6-lp151.2.6.1, docker 19.03.1_ce-lp151.2.12.1

SUSE LE: new containerd packages.
New packages are available:
  SUSE LE 12 RTM-SP5: containerd 1.2.6-16.23.1, docker 19.03.1_ce-98.46.1
  SUSE LE 15 RTM: containerd 1.2.6-5.16.1, docker 19.03.1_ce-6.26.2
  SUSE LE 15 SP1: containerd 1.2.6-5.16.1, docker 19.03.1_ce-6.26.2
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