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83 lines
2.1 KiB
Python
83 lines
2.1 KiB
Python
#!/usr/bin/python
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import tarfile
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unsafe_filename_tar = sys.argv[1]
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safe_filename_tar = "safe_path.tar"
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tar = tarfile.open(safe_filename_tar)
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for entry in tar:
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tar.extract(entry)
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tar = tarfile.open(unsafe_filename_tar)
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tar.extractall()
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tar.close()
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tar = tarfile.open(unsafe_filename_tar)
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for entry in tar:
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tar.extract(entry)
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tar = tarfile.open(safe_filename_tar)
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tar.extractall()
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tar.close()
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#Sanitized
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tar = tarfile.open(unsafe_filename_tar)
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for entry in tar:
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if os.path.isabs(entry.name) or ".." in entry.name:
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raise ValueError("Illegal tar archive entry")
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tar.extract(entry, "/tmp/unpack/")
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#Part Sanitized
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tar = tarfile.open(unsafe_filename_tar)
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for entry in tar:
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if ".." in entry.name:
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raise ValueError("Illegal tar archive entry")
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tar.extract(entry, "/tmp/unpack/")
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#Unsanitized members
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tar = tarfile.open(unsafe_filename_tar)
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tar.extractall(members=tar)
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#Sanitize members
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def safemembers(members):
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for info in members:
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if badpath(info):
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raise
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yield info
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tar = tarfile.open(unsafe_filename_tar)
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tar.extractall(members=safemembers(tar))
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# Wrong sanitizer (is missing not)
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tar = tarfile.open(unsafe_filename_tar)
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for entry in tar:
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if os.path.isabs(entry.name) or ".." in entry.name:
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tar.extract(entry, "/tmp/unpack/")
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# OK Sanitized using not
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tar = tarfile.open(unsafe_filename_tar)
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for entry in tar:
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if not (os.path.isabs(entry.name) or ".." in entry.name):
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tar.extract(entry, "/tmp/unpack/")
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# The following two variants are included by purpose, since by default there is a
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# difference in handling `not x` and `not (x or False)` when overriding
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# Sanitizer.sanitizingEdge. We want to ensure we handle both consistently.
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# Not reported, although vulnerable to '..'
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tar = tarfile.open(unsafe_filename_tar)
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for entry in tar:
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if not (os.path.isabs(entry.name) or False):
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tar.extract(entry, "/tmp/unpack/")
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# Not reported, although vulnerable to '..'
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tar = tarfile.open(unsafe_filename_tar)
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for entry in tar:
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if not os.path.isabs(entry.name):
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tar.extract(entry, "/tmp/unpack/")
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