CVE-2019-11249

MEDIUM

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.

References

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/

Details

Source: MITRE

Published: 2019-08-29

Updated: 2019-11-07

Type: CWE-264

Risk Information

CVSS v2.0

Base Score: 5.8

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:P

Impact Score: 4.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM