CVE-2007-4559 Patch

binja/analyze.py

@@ -27,7 +27,26 @@ def analyze_crash(core):
         print("Usage:", sys.argv[0], "<path/to/krfanalysis-{binary}-{timestamp}.tar.gz>")
         sys.exit(1)
     with tarfile.open(sys.argv[1], "r:gz") as tar:
-        tar.extractall()
+        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)
         dirname = tar.getnames()[0]
 
     binaries = {}