Raise an exception on invalid TAG data (#26)

fox-it · Nov 13, 2023 · 67b1aaf · 67b1aaf
1 parent af92e25
commit 67b1aaf
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/dissect/esedb/page.py b/dissect/esedb/page.py
@@ -182,6 +182,9 @@ def __init__(self, page: Page, num: int):
         self.size = self.tag.cb_ & mask
         self.offset = self.tag.ib_ & mask
 
+        if self.size == 0 and self.num != 0:
+            raise ValueError("Invalid TAG data, corrupt database?")
+
         self.data = self.page.data[self.offset : self.offset + self.size]
 
         flags = 0