CVE-2007-4559 Patch

src/DeepLabCut/deeplabcut/utils/auxfun_models.py

@@ -48,7 +48,26 @@ def Downloadweights(modeltype,model_path):
         print("Downloading a ImageNet-pretrained model from {}....".format(url))
         response = urllib.request.urlopen(url)
         with tarfile.open(fileobj=BytesIO(response.read()), mode='r:gz') as tar:
-            tar.extractall(path=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(tar, path=target_dir)
     except KeyError:
         print("Model does not exist: ", modeltype)
         print("Pick one of the following: ", neturls.keys())