Added cyclic sector chain check to CompoundFile.GetMiniSectorChain

ironfede · Oct 24, 2018 · 27775bd · 27775bd
1 parent 6e03dc5
commit 27775bd
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/sources/OpenMcdf/CompoundFile.cs b/sources/OpenMcdf/CompoundFile.cs
@@ -1507,8 +1507,13 @@ StreamView miniFATView
                     result.Add(ms);
 
                     miniFATView.Seek(nextSecID * 4, SeekOrigin.Begin);
-                    nextSecID = miniFATReader.ReadInt32();
-                }
+					int next = miniFATReader.ReadInt32();
+
+					if (next != nextSecID)
+						nextSecID = next;
+					else
+						throw new CFCorruptedFileException("Cyclic sector chain found. File is corrupted");
+				}
             }
             return result;
         }