CVE-2007-4559 Patch

language/gpt/tools/download/utils.py

@@ -37,7 +37,26 @@ def chunks(l, n, s=0):
 
 def extract_archive(archive_fp, outdir="."):
     with tarfile.open(archive_fp, "r") as tar:
-        tar.extractall(outdir)
+        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, outdir)
     return outdir