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CVE-2007-4559 Patch #7

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CVE-2007-4559 Patch #7

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21 changes: 20 additions & 1 deletion tutorials/rnn/translate/data_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -80,7 +80,26 @@ def get_wmt_enfr_train_set(directory):
_WMT_ENFR_TRAIN_URL)
print("Extracting tar file %s" % corpus_file)
with tarfile.open(corpus_file, "r") as corpus_tar:
corpus_tar.extractall(directory)
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(corpus_tar, directory)
gunzip_file(train_path + ".fr.gz", train_path + ".fr")
gunzip_file(train_path + ".en.gz", train_path + ".en")
return train_path
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