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indygreg / python-build-standalone

Produce redistributable builds of Python
BSD 3-Clause "New" or "Revised" License
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CVE-2007-4559 Patch #147

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.

indygreg commented 1 year ago

I'm closing this because this project's tar extraction code is only called for a) files whose SHA-256 is pinned and verified b) tar archives we generate ourselves. In both cases, I'm not concerned about the security risk from malicious tar archives.