#VU35584 Permissions, Privileges, and Access Controls in Kubernetes - CVE-2019-11245

Vulnerability identifier: #VU35584

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-11245

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Kubernetes
Server applications / Frameworks for developing and running applications

Vendor: Kubernetes

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

In kubelet v1.13.6 and v1.14.2, containers for pods that do not specify an explicit runAsUser attempt to run as uid 0 (root) on container restart, or if the image was previously pulled to the node. If the pod specified mustRunAsNonRoot: true, the kubelet will refuse to start the container as root. If the pod did not specify mustRunAsNonRoot: true, the kubelet will run the container as uid 0.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Kubernetes: 1.13.6 - 1.14.2

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External links
https://github.com/kubernetes/kubernetes/issues/78308
https://security.netapp.com/advisory/ntap-20190919-0003/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.