Vulnerability of Kubernetes: directory traversal via Kubectl Cp

Synthesis of the vulnerability

An attacker can traverse directories via Kubectl Cp of Kubernetes, in order to read a file outside the service root path.

Impacted systems: Fedora, IBM API Connect, Kubernetes.

Severity of this alert: 2/4.

Creation date: 02/04/2019.

Références of this alert: CVE-2019-1002101, FEDORA-2019-bf800b1c04, ibm10882578, ibm10882596, ibm10882756, ibm10882762, ibm10882952, ibm10882956, VIGILANCE-VUL-28919.

Description of the vulnerability

An attacker can traverse directories via Kubectl Cp of Kubernetes, in order to read a file outside the service root path.
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This weakness bulletin impacts software or systems such as Fedora, IBM API Connect, Kubernetes.

Our Vigil@nce team determined that the severity of this computer weakness 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 vulnerability announce.

Solutions for this threat

Kubernetes: versions 1.11.9, 1.12.7, 1.13.5 and 1.14.0.
Versions 1.11.9, 1.12.7, 1.13.5 and 1.14.0 are fixed:
https://github.com/kubernetes/kubernetes/releases

Kubernetes: patch for Kubectl Cp.
A patch is available:
https://github.com/kubernetes/kubernetes/pull/75037/commits/ee7edb77659902afbe2f7b872159cf9f952a8e23

Cloud Foundry Container Runtime: version 0.31.0.
The version 0.31.0 is fixed:
https://www.cloudfoundry.org/

Fedora 30: new kubernetes packages.
New packages are available:
Fedora 30: kubernetes 1.13.5-1.fc30

IBM API Connect: version 2018.4.1.5.
The version 2018.4.1.5 is fixed:
http://www.ibm.com/support/fixcentral/swg/quickorder?parent=ibm%7EWebSphere&product=ibm/WebSphere/IBM+API+Connect&release=2018.4.1.4&platform=All&function=all&source=fc

Pivotal Container Service: version 1.2.11.
The version 1.2.11 is fixed:
https://pivotal.io/

Pivotal Container Service: version 1.3.5.
The version 1.3.5 is fixed:
https://pivotal.io/

Wind River Linux: solution (21/05/2019).
The solution is indicated in information sources.
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