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IBM Lotus iNotes dwa85W ActiveX Buffer Overflow

This module exploits a buffer overflow vulnerability on the UploadControl ActiveX. The vulnerability exists in the handling of the "Attachment_Times" property, due to the insecure usage of the _swscanf. The affected ActiveX is provided by the dwa85W.dll installed with the IBM Lotus iNotes ActiveX installer. This module has been tested successfully on IE6-IE9 on Windows XP, Vista and 7, using the dwa85W.dll as installed with Lotus Domino 8.5.3. In order to bypass ASLR the no aslr compatible module dwabho.dll is used. This one is installed with the iNotes ActiveX.

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Module Name



  • Gaurav Baruah
  • juan vazquez <juan.vazquez [at]>



  • IE 7 on Windows XP SP3
  • IE 8 on Windows XP SP3
  • Automatic
  • IE 6 on Windows XP SP3
  • IE 7 on Windows Vista
  • IE 8 on Windows Vista
  • IE 8 on Windows 7
  • IE 9 on Windows 7


  • windows



Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use exploit/windows/browser/inotes_dwa85w_bof msf exploit(inotes_dwa85w_bof) > show targets ...targets... msf exploit(inotes_dwa85w_bof) > set TARGET <target-id> msf exploit(inotes_dwa85w_bof) > show options and set options... msf exploit(inotes_dwa85w_bof) > exploit