#VU30806 Permissions, Privileges, and Access Controls in Kubernetes - CVE-2019-11249
Published: August 29, 2019 / Updated: July 17, 2020
Kubernetes
Kubernetes
Description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
The kubectl cp command allows copying files between containers and the user machine. To copy files from a container, Kubernetes runs tar inside the container to create a tar archive, copies it over the network, and kubectl unpacks it on the user’s machine. If the tar binary in the container is malicious, it could run any code and output unexpected, malicious results. An attacker could use this to write files to any path on the user’s machine when kubectl cp is called, limited only by the system permissions of the local user. Kubernetes affected versions include versions prior to 1.13.9, versions prior to 1.14.5, versions prior to 1.15.2, and versions 1.1, 1.2, 1.4, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.
Remediation
External links
- https://access.redhat.com/errata/RHBA-2019:2794
- https://access.redhat.com/errata/RHBA-2019:2816
- https://access.redhat.com/errata/RHBA-2019:2824
- https://access.redhat.com/errata/RHSA-2019:3239
- https://access.redhat.com/errata/RHSA-2019:3811
- https://github.com/kubernetes/kubernetes/issues/80984
- https://groups.google.com/d/msg/kubernetes-security-announce/vUtEcSEY6SM/v2ZZxsmtFQAJ
- https://security.netapp.com/advisory/ntap-20190919-0003/