Directory traversal vulnerability in JCraft JSch before 0.1.54 on Windows, when the mode is ChannelSftp.OVERWRITE, allows remote SFTP servers to write to arbitrary files via a ..\ (dot dot backslash) in a response to a recursive GET command.
https://www.exploit-db.com/exploits/40411/
https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-5725
http://www.securityfocus.com/bid/93100
http://seclists.org/fulldisclosure/2016/Sep/53
http://packetstormsecurity.com/files/138809/jsch-0.1.53-Path-Traversal.html