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| for member in tar.getmembers(): | ||
| member_path = os.path.join(path, member.name) | ||
| if not is_within_directory(path, member_path): | ||
| raise Exception("Attempted Path Traversal in Tar File") |
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Using Exception and BaseException can make your code prone to errors and difficult to maintain. Instead, we recommend using one of the Built-in Exceptions or creating a custom exception class that is derived from Exception or one of its subclasses.
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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.