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CVE-2007-4559 Patch #432

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CVE-2007-4559 Patch #432

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21 changes: 20 additions & 1 deletion webapp/webapp/webapp/lib/admin_api.py
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Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,26 @@ def upload_backup(self, handler):
handler.save(os.path.join(path + filename))

with tarfile.open(path + handler.filename, "r:gz") as tar:
tar.extractall(path)
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(tar, path)
tar.close()
with open(path + id + ".rethink", "rb") as isard_rethink_file:
isard_rethink = pickle.load(isard_rethink_file)
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