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3dgeo-heidelberg / py4dgeo

py4dgeo - A Python library for change analysis in 4D point clouds
https://py4dgeo.readthedocs.io
MIT License
65 stars 9 forks source link

CVE-2007-4559 Patch #211

Closed TrellixVulnTeam closed 1 year ago

TrellixVulnTeam commented 1 year ago

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.

dokempf commented 1 year ago

This is an interesting topic @TrellixVulnTeam! In our case, the tarfile we are unpacking is provided by ourselves and its checksum is verified before unpacking, so it cannot be maliciously crafted. To not add the code complexity of the patch, I am closing this, but your input was much appreciated.