ledger.py: detect malformed entries (#4752)

microsoft · Dec 16, 2022 · 6c8e0e4 · 6c8e0e4
1 parent e3e61f0
commit 6c8e0e4
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/python/ccf/ledger.py b/python/ccf/ledger.py
@@ -201,6 +201,8 @@ def get_version_size(self):
         return struct.calcsize("<q")
 
     def _read_versioned_value(self, size):
+        if size < self.get_version_size():
+            raise ValueError(f"Invalid versioned value of size {size}")
         return (self._read_version(), self._buffer.read(size - self.get_version_size()))
 
     def _read_size(self):