CVE-2007-4559 Patch

examples/cnn/load_cifar10.py

@@ -36,7 +36,26 @@ def download_cifar10_if_not_found():
 
     print("Extracting CIFAR 10 dataset...")
     with tarfile.open(CIFAR10_TAR_PATH) as tar:
-        tar.extractall(path=FILES_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=FILES_DIR)
 
     print("Extracting finished\n")
 

examples/mlp/imdb_review_classification/loaddata.py

@@ -50,7 +50,26 @@ def remove_tags_from_text(text):
         logger.info("Extracting files from the archive")
 
         with tarfile.open(path_to_archive) as tar_archive_file:
-            tar_archive_file.extractall(path=DATA_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_archive_file, path=DATA_DIR)
 
         shutil.move(EXTRACTED_DIRECTORY, REVIEW_DATA_PATH)
     else: