CVE-2007-4559 Patch

tests/test_examples.py

@@ -50,7 +50,29 @@ def init_class_fixtures(cls):
         cls.add_class_callback(partial(unregister, 'test'))
 
         with tarfile.open(test_resource_path('example_data.tar.gz')) as tar:
-            tar.extractall(cls.tmpdir.path)
+
+            import os
+
+            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, cls.tmpdir.path)
 
         cls.expected_perf = dataframe_cache(
             cls.tmpdir.getpath(

zipline/data/bundles/quandl.py

@@ -331,7 +331,29 @@ def quantopian_quandl_bundle(environ,
     with tarfile.open('r', fileobj=data) as tar:
         if show_progress:
             log.info("Writing data to %s." % output_dir)
-        tar.extractall(output_dir)
+
+        import os
+
+        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, output_dir)
 
 
 register_calendar_alias("QUANDL", "NYSE")