The kubectl cp command allows copying files between containers and the user machine. To copy files from a container, Kubernetes creates a tar inside the container, 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. The untar function can both create and follow symbolic links. The issue is resolved in kubectl v1.11.9, v1.12.7, v1.13.5, and v1.14.0.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: dwf

Published: 2019-04-01T14:14:27.768040Z

Updated: 2024-09-16T20:46:49.730Z

Reserved: 2019-04-01T00:00:00

Link: CVE-2019-1002101

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-04-01T14:29:00.640

Modified: 2023-11-07T03:02:13.563

Link: CVE-2019-1002101

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-03-28T00:00:00Z

Links: CVE-2019-1002101 - Bugzilla