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CVE-2007-4559 Patch #2

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CVE-2007-4559 Patch #2

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21 changes: 20 additions & 1 deletion cub2011.py
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Original file line number Diff line number Diff line change
Expand Up @@ -80,7 +80,26 @@ def _download(self):
download_file_from_google_drive(self.file_id, self.root, self.filename, self.tgz_md5)

with tarfile.open(os.path.join(self.root, self.filename), "r:gz") as tar:
tar.extractall(path=self.root)
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=self.root)

def __len__(self):
return len(self.data)
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21 changes: 20 additions & 1 deletion dogs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,26 @@ def download(self):
download_url(url, self.root, tar_filename, None)
print('Extracting downloaded file: ' + join(self.root, tar_filename))
with tarfile.open(join(self.root, tar_filename), 'r') as tar_file:
tar_file.extractall(self.root)
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_file, self.root)
os.remove(join(self.root, tar_filename))

def load_split(self):
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