Kubernetes CVE-2019-11250 Information Disclosure Vulnerability

Description

Kubernetes is prone to an information-disclosure vulnerability. An attacker can exploit this issue to obtain potentially sensitive information. Information obtained may aid in further attacks. Versions prior to Kubernetes 1.16.0 are vulnerable.

Technologies Affected

• Cisco CloudCenter Suite 5.1.3
• Cisco CloudCenter Suite 5.2.0
• Kubernetes Kubernetes 1.12.0
• Kubernetes Kubernetes 1.12.1
• Kubernetes Kubernetes 1.12.10
• Kubernetes Kubernetes 1.12.2
• Kubernetes Kubernetes 1.12.3
• Kubernetes Kubernetes 1.12.4
• Kubernetes Kubernetes 1.12.5
• Kubernetes Kubernetes 1.12.6
• Kubernetes Kubernetes 1.12.7
• Kubernetes Kubernetes 1.12.9
• Kubernetes Kubernetes 1.13.0
• Kubernetes Kubernetes 1.13.3
• Kubernetes Kubernetes 1.13.4
• Kubernetes Kubernetes 1.13.5
• Kubernetes Kubernetes 1.13.6
• Kubernetes Kubernetes 1.13.8
• Kubernetes Kubernetes 1.14.0
• Kubernetes Kubernetes 1.14.2
• Kubernetes Kubernetes 1.14.3
• Kubernetes Kubernetes 1.14.4
• Kubernetes Kubernetes 1.15.0
• Redhat OpenShift Container Platform 3.10
• Redhat OpenShift Container Platform 3.11
• Redhat OpenShift Container Platform 3.9
• Redhat OpenShift Container Platform 4.1

Recommendations

Block external access at the network boundary, unless external parties require service.
Filter access to the affected computer at the network boundary if global access isn’t needed. Restricting access to only trusted computers and networks might greatly reduce the likelihood of a successful exploit.

Run all software as a nonprivileged user with minimal access rights.
Run all non-administrative software as a non-administrative user with the least amount of privileges required to successfully operate. This will greatly reduce the potential damage that successful exploitation may achieve.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for anomalous or suspicious activity. Monitor logs (generated by NIDS and by the server) for evidence of attacks against the server.

Updates are available. Please see the references or vendor advisory for more information.