source-to-image: Unsanitized paths in tar.go:ExtractTarStreamFromTarReader() allow malicious containers to overwrite files on the client machine

Openshift Enterprise source-to-image before version 1.1.10 is vulnerable to an improper validation of user input. An attacker who could trick a user into using the command to copy files locally, from a pod, could override files outside of the target directory of the command.