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Kubernetes: CVE-2019-11251: Nefarious file using a symlink

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Kubernetes: CVE-2019-11251: Nefarious file using a symlink

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
02/03/2020
Created
02/15/2020
Added
02/14/2020
Modified
02/14/2020

Description

The Kubernetes kubectl cp command in versions 1.1-1.12, and versions prior to 1.13.11, 1.14.7, and 1.15.4 allows a combination of two symlinks provided by tar output of a malicious container to place a file outside of the destination directory specified in the kubectl cp invocation. This could be used to allow an attacker to place a nefarious file using a symlink, outside of the destination tree.

Solution(s)

  • kubernetes-upgrade-1_13_11
  • kubernetes-upgrade-1_14_7
  • kubernetes-upgrade-1_15_4

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