New submission from Artem Bulgakov <artemsbulga...@ya.ru>:
tarfile sets FNAME field to the path given by user: Lib/tarfile.py:424 It writes full path instead of just basename if user specified absolute path. Some archive viewer apps like 7-Zip may process file incorrectly. Also it creates security issue because anyone can know structure of directories on system and know username or other personal information. You can reproduce this by running below lines in Python interpreter. Tested on Windows and Linux. Python 3.8.2 (default, Apr 27 2020, 15:53:34) [GCC 9.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import os >>> import tarfile >>> open("somefile.txt", "w").write("sometext") 8 >>> tar = tarfile.open("/home/bulgakovas/file.tar.gz", "w|gz") >>> tar.add("somefile.txt") >>> tar.close() >>> open("file.tar.gz", "rb").read()[:50] b'\x1f\x8b\x08\x08cE\x10_\x02\xff/home/bulgakovas/file.tar\x00\xed\xd3M\n\xc20\x10\x86\xe1\xac=EO\x90' You can see full path to file.tar (/home/bulgakovas/file.tar) as FNAME field. If you will write just tarfile.open("file.tar.gz", "w|gz"), FNAME will be equal to file.tar. RFC1952 says about FNAME: This is the original name of the file being compressed, with any directory components removed. So tarfile must remove directory names from FNAME and write only basename of file. ---------- components: Library (Lib) messages: 373759 nosy: ArtemSBulgakov, lars.gustaebel priority: normal severity: normal status: open title: tarfile: Do not write full path in FNAME field type: behavior versions: Python 3.10, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue41316> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com