All Vulnerability Reports

CVE-2019-1002101: Kubernetes kubectl - potential directory traversal


Severity

High

Vendor

Pivotal Cloud Foundry

Description

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.

Affected Pivotal Products and Versions

Severity is high unless otherwise noted.

  • Pivotal Container Service (PKS)
    • versions 1.2.x prior to 1.2.11
    • Versions 1.3.x prior to 1.3.5
Mitigation

Users of affected versions should apply the following mitigation:

  • Pivotal recommends upgrading the following releases:
    • Pivotal Container Service (PKS)
      • Upgrade 1.2.x versions to 1.2.11 or greater
      • Upgrade 1.3.x versions to 1.3.5 or greater
References
History

2019-04-01: Initial vulnerability report published

문의