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mjpost / sacrebleu

Reference BLEU implementation that auto-downloads test sets and reports a version string to facilitate cross-lab comparisons
Apache License 2.0
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CVE-2007-4559 Patch #223

Open TrellixVulnTeam opened 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.

martinpopel commented 1 year ago

@TrellixVulnTeam You write it is a bug in the tarfile Python core package. So let's fix it there for the new Python versions and provide an alternative non-core package for old Python versions. I think extractall() should have a safe parameter, which should be True by default. That would prevent littering source code of thousands of repos using tarfile.