This vulnerability may allow an attacker to use the
kubectl cp command to write malicious files in the container
tar package to any path on the host using Path Traversal. This process is limited only by the system permissions of the local user.
This vulnerability has a similar impact caused by CVE-2019-1002101 that was found not long before.
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.
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 (Path Traversal) on the user’s machine when
kubectl cp is called.
Fixed by Official
Fixed by KLTS
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