Fix read overflow

Packet++/src/BgpLayer.cpp

@@ -744,13 +744,21 @@ namespace pcpp
 
 		if (newNlriDataLen > curNlriDataLen)
 		{
-			bool res = extendLayer(sizeof(bgp_common_header) + 2 * sizeof(uint16_t) + curWithdrawnRoutesDataLen +
-			                           curPathAttributesDataLen,
-			                       newNlriDataLen - curNlriDataLen);
-			if (!res)
+			try
 			{
-				PCPP_LOG_ERROR("Couldn't extend BGP update layer to include the additional NLRI data");
-				return res;
+				bool res = extendLayer(sizeof(bgp_common_header) + 2 * sizeof(uint16_t) + curWithdrawnRoutesDataLen +
+				                           curPathAttributesDataLen,
+				                       newNlriDataLen - curNlriDataLen);
+				if (!res)
+				{
+					PCPP_LOG_ERROR("Couldn't extend BGP update layer to include the additional NLRI data");
+					return res;
+				}
+			}
+			catch (const std::length_error& e)
+			{
+				PCPP_LOG_ERROR("Failed to extend BGP update layer: " << e.what());
+				return false;
 			}
 		}
 		else if (newNlriDataLen < curNlriDataLen)

Packet++/src/RawPacket.cpp

@@ -136,6 +136,13 @@ namespace pcpp
 
 	void RawPacket::insertData(int atIndex, const uint8_t* dataToInsert, size_t dataToInsertLen)
 	{
+		// Check for overflow in the new length
+		if ((size_t)m_RawDataLen + dataToInsertLen < (size_t)m_RawDataLen)
+		{
+			throw std::length_error(
+			    "RawPacket::insertData: dataToInsertLen causes overflow in the new length calculation");
+		}
+
 		// memmove copies data as if there was an intermediate buffer in between - so it allows for copying processes on
 		// overlapping src/dest ptrs if insertData is called with atIndex == m_RawDataLen, then no data is being moved.
 		// The data of the raw packet is still extended by dataToInsertLen