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CVE-2007-4559 Patch #12

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CVE-2007-4559 Patch #12

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21 changes: 20 additions & 1 deletion bothub_cli/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -193,7 +193,26 @@ def extract_dist_package(dist_file_path, target_dir=None):
_target_dir = target_dir or '.'

with tarfile.open(dist_file_path, 'r:gz') as tin:
tin.extractall(_target_dir)
def is_within_directory(directory, target):

abs_directory = os.path.abspath(directory)
abs_target = os.path.abspath(target)

prefix = os.path.commonprefix([abs_directory, abs_target])

return prefix == abs_directory

def safe_extract(tar, path=".", members=None, *, numeric_owner=False):

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")

tar.extractall(path, members, numeric_owner=numeric_owner)


safe_extract(tin, _target_dir)


def make_event(message):
Expand Down