New submission from Guido Vranken: Tools/scripts/ftpmirror.py does not guard against arbitrary path constructions, and, given a connection to a malicious FTP server (or a man in the middle attack), it is possible that any file on the client's filesystem gets overwritten. Ie,. if we suppose that ftpmirror.py is run from a "base directory" /home/xxx/yyy, file creations can occur outside this base directory, such as in /tmp, /etc, /var, just to give some examples.
I've constructed a partial proof of concept FTP server that demonstrates directory and file creation outside the base directory (the directory the client script was launched from). I understand that most of the files in Tools/scripts/ are legacy applications that have long been deprecated. However, if the maintainers think these applications should be safe nonetheless, I'll be happy to construct and submit a patch that will remediate this issue. Guido Vranken Intelworks ---------- components: Demos and Tools messages: 233189 nosy: Guido priority: normal severity: normal status: open title: Tools/scripts/ftpmirror.py allows overwriting arbitrary files on filesystem type: security versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4, Python 3.5, Python 3.6 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue23130> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
