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CVE-2007-4559 Patch #11

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24 changes: 23 additions & 1 deletion wild_sight/data/download_gzgc.py
Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,29 @@ def download_data(save_dir: pathlib.Path):
shutil.copyfileobj(r.raw, f)

with tarfile.open(tmp_file, "r:gz") as data:
data.extractall(save_dir)

import os

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(data, save_dir)


if __name__ == "__main__":
Expand Down