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Vulnerability of Kubernetes: directory traversal via Kubectl Symlinks

Synthesis of the vulnerability 

An attacker can traverse directories via Kubectl Symlinks of Kubernetes, in order to create a file outside the service root path.
Vulnerable systems: IBM API Connect, Kubernetes.
Severity of this threat: 2/4.
Creation date: 19/09/2019.
Références of this weakness: 1274986, CVE-2019-11251, VIGILANCE-VUL-30362.

Description of the vulnerability 

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

Our Vigil@nce team determined that the severity of this computer threat announce is medium.

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

An attacker with a expert ability can exploit this threat announce.

Solutions for this threat 

Kubernetes: version 1.16.0.
The version 1.16.0 is fixed:
  https://github.com/kubernetes/kubernetes/
  https://kubernetes.io/

Kubernetes: version 1.15.4.
The version 1.15.4 is fixed:
  https://github.com/kubernetes/kubernetes/
  https://kubernetes.io/

Kubernetes: version 1.14.7.
The version 1.14.7 is fixed:
  https://github.com/kubernetes/kubernetes/
  https://kubernetes.io/

Kubernetes: version 1.13.11.
The version 1.13.11 is fixed:
  https://github.com/kubernetes/kubernetes/
  https://kubernetes.io/

IBM API Connect: patch for Kubernetes.
A patch is indicated in information sources.

Wind River Linux: version 10.19.45.6.
The version 10.19.45.6 is fixed:
  https://support2.windriver.com/
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