CVE-2019-11249 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Reference

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/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.5