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Vulnerability of Docker Engine: privilege escalation via file descriptors

Synthesis of the vulnerability 

An attacker, inside a guest system, can use file descriptor inherited via the debug support of Docker Engine, in order to escalate his privileges on the host system.
Impacted systems: Docker CE, Fedora, Kubernetes, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES.
Severity of this alert: 1/4.
Creation date: 11/01/2017.
Références of this alert: CVE-2016-9962, FEDORA-2017-0200646669, FEDORA-2017-20cdb2063a, FEDORA-2017-c2c2d1be16, FEDORA-2017-dbc2b618eb, FEDORA-2017-fcd02e2c2d, openSUSE-SU-2017:1966-1, RHSA-2017:0116-01, RHSA-2017:0123-01, RHSA-2017:0127-01, SUSE-SU-2019:0573-1, SUSE-SU-2019:1264-1, VIGILANCE-VUL-21551.

Description of the vulnerability 

The Docker Engine product offers cross container debugging support.

However, file descriptors inherited by new processes are not filtered, so an attacker can access files opened by a process in another container.

An attacker, inside a guest system, can therefore use file descriptor inherited via the debug support of Docker Engine, in order to escalate his privileges on the host system.
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This computer vulnerability alert impacts software or systems such as Docker CE, Fedora, Kubernetes, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES.

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

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

An attacker with a expert ability can exploit this security vulnerability.

Solutions for this threat 

Docker Engine: version 1.12.6.
The version 1.12.6 is fixed. The information source includes URLs of binary packages for supported plateforms.

Fedora 25: new runc packages.
New packages are available:
  Fedora 25: runc 1.0.1-1.gitc5ec254.fc25

Fedora: new docker packages.
New packages are available:
  Fedora 25: docker 1.12.6-3.git51ef5a8.fc25, docker latest 1.12.6-2.git51ef5a8.fc25
  Fedora 24: docker latest-1.12.6-1.git51ef5a8.fc24

Kubernetes: version 1.4.12.
The version 1.4.12 is fixed:
  https://dl.k8s.io/v1.4.12/kubernetes.tar.gz

Kubernetes: version 1.5.4.
The version 1.5.4 is fixed:
  https://github.com/kubernetes/kubernetes/releases/tag/v1.5.4

openSUSE Leap 42: new docker packages.
New packages are available:
  openSUSE Leap 42.1: docker 1.12.6-27.1
  openSUSE Leap 42.2: docker 1.12.6-25.2

RHEL 7: new docker packages.
New packages are available:
  RHEL 7: docker 1.12.5-14.el7, runc 1.0.0-1.rc2.el7

SUSE LE 12: new containerd packages.
New packages are available:
  SUSE LE 12 RTM-SP4: containerd 1.2.5-16.17.2, docker-18.09.6_ce-98.37.1
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