Ensure the network packets are not corrupted

Author: sharadraju

lib/thin/sqlnet/packet.js

@@ -296,7 +296,9 @@ function RedirectPacket(packet) {
  */
 function MarkerPacket(isLargeSDU) {
   this.len = constants.NSPMKDAT + 1; /* Packet length */
-  this.buf = Buffer.allocUnsafe(constants.NSPMKDAT + 1); /* Packet Buffer */
+
+  // Packet Buffer
+  this.buf = Buffer.allocUnsafe(constants.NSPMKDAT + 1).fill(0);
 
   if (isLargeSDU) {
     this.buf.writeUInt32BE(this.len, constants.NSPHDLEN);