CVE-2007-4559 Patch #1591
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CVE-2007-4559 Patch #1591
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Please submit your patch to CPython and I'd be happy to backport whatever fix gets adopted. python/cpython#73974 |
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This patch seems to have been copied from https://gist.github.com/Kasimir123/9bdc38f2eac9a19f83ef6cc52c7ce82e and inherits its issues, as well as not covering symlink attacks. In understand from the OP that @TrellixVulnTeam and @Kasimir123 are part of a team. Nonetheless, it would be best practise to credit the source of the code in a source code comment, as well as to report on checks that have been carried out to ascertain licence compatibility. |
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Patching CVE-2007-4559
Hi, we are security researchers from the Advanced Research Center at Trellix. We have began a campaign to patch a widespread bug named CVE-2007-4559. CVE-2007-4559 is a 15 year old bug in the Python tarfile package. By using extract() or extractall() on a tarfile object without sanitizing input, a maliciously crafted .tar file could perform a directory path traversal attack. We found at least one unsantized extractall() in your codebase and are providing a patch for you via pull request. The patch essentially checks to see if all tarfile members will be extracted safely and throws an exception otherwise. We encourage you to use this patch or your own solution to secure against CVE-2007-4559. Further technical information about the vulnerability can be found in this blog.
If you have further questions you may contact us through this projects lead researcher Kasimir Schulz.