CVE-2007-4559 Patch

[TrellixVulnTeam]

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.

[google-cla]

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[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: TrellixVulnTeam
Once this PR has been reviewed and has the lgtm label, please assign zmarano for approval by writing /assign @zmarano in a comment. For more information see the Kubernetes Code Review Process.

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[google-oss-prow]

Hi @TrellixVulnTeam. Thanks for your PR.

I'm waiting for a GoogleCloudPlatform member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[zmarano]

/ok-to-test

[google-oss-prow]

@TrellixVulnTeam: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
prow/presubmit/flake8	532ed27	link	true	/flake8

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[hopkiw]

Hi @TrellixVulnTeam

Please sign the contributor license agreement and address the python flake8 failures above so we can merge this PR

[disconnect3d]

Hi, just a heads up that this fix for path traversal in tar.extractall is insufficient. Here you can read more information about it: python/cpython#74453 (comment)