CVE-2007-4559 Patch

LMI/Java/Installs/Extract.py

@@ -44,7 +44,26 @@ def _do_extraction(destination_folder, file, file_ending, verbose):
             z.extractall(path=os.path.abspath(destination_folder))
     elif file_ending == "7z":
         with lzma.open(file) as z:
-            z.extractall(path=destination_folder)
+            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(z, path=destination_folder)
     else:
         if verbose:
             print(colored("Not a supported archive type!", "red"))