#1702 add more checks

skalenetwork · Nov 13, 2023 · 4995613 · 4995613
1 parent ca16ebf
commit 4995613
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/libethereum/Precompiled.cpp b/libethereum/Precompiled.cpp
@@ -255,6 +255,10 @@ static void convertBytesToString(
         throw std::runtime_error( "Input is too short - invalid input in convertBytesToString()" );
     }
     bigint const sstringLength( parseBigEndianRightPadded( _in, _startPosition, UINT256_SIZE ) );
+    if ( sstringLength < 0 ) {
+        throw std::runtime_error(
+            "Negative string length - invalid input in convertBytesToString()" );
+    }
     _stringLength = sstringLength.convert_to< size_t >();
     if ( _startPosition + UINT256_SIZE + _stringLength > _in.size() ) {
         throw std::runtime_error( "Invalid input in convertBytesToString()" );