/* goodG2B() - use goodsource and badsink */ private void GoodG2B() { int data; /* FIX: Use a hardcoded number that won't cause underflow, overflow, divide by zero, or loss-of-precision issues */ data = 2; CWE191_Integer_Underflow__int_Listen_tcp_multiply_51b.GoodG2BSink(data); }
public override void Bad() { int data; data = int.MinValue; /* Initialize data */ /* Read data using a listening tcp connection */ { TcpListener listener = null; /* Read data using a listening tcp connection */ try { listener = new TcpListener(IPAddress.Parse("10.10.1.10"), 39543); listener.Start(); using (TcpClient tcpConn = listener.AcceptTcpClient()) { /* read input from socket */ using (StreamReader sr = new StreamReader(tcpConn.GetStream())) { /* POTENTIAL FLAW: Read data using a listening tcp connection */ string stringNumber = sr.ReadLine(); if (stringNumber != null) // avoid NPD incidental warnings { try { data = int.Parse(stringNumber.Trim()); } catch (FormatException exceptNumberFormat) { IO.Logger.Log(NLog.LogLevel.Warn, exceptNumberFormat, "Number format exception parsing data from string"); } } } } } catch (IOException exceptIO) { IO.Logger.Log(NLog.LogLevel.Warn, exceptIO, "Error with stream reading"); } finally { try { if (listener != null) { listener.Stop(); } } catch (SocketException se) { IO.Logger.Log(NLog.LogLevel.Warn, se, "Error closing TcpListener"); } } } CWE191_Integer_Underflow__int_Listen_tcp_multiply_51b.BadSink(data); }