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ActiveFax (ActFax) 4.3 Client Importer Buffer Overflow

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ActiveFax (ActFax) 4.3 Client Importer Buffer Overflow



This module exploits a vulnerability in ActiveFax Server. The vulnerability is a stack based buffer overflow in the "Import Users from File" function, due to the insecure usage of strcpy while parsing the csv formatted file. The module creates a .exp file that must be imported with ActiveFax Server. It must be imported with the default character set 'ECMA-94 / Latin 1 (ISO 8859)'. The module has been tested successfully on ActFax Server 4.32 over Windows XP SP3 and Windows 7 SP1. In the Windows XP case, when ActFax runs as a service, it will execute as SYSTEM.


  • Craig Freyman
  • Brandon Perry
  • juan vazquez <juan.vazquez@metasploit.com>




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/fileformat/actfax_import_users_bof
msf exploit(actfax_import_users_bof) > show targets
msf exploit(actfax_import_users_bof) > set TARGET < target-id >
msf exploit(actfax_import_users_bof) > show options
    ...show and set options...
msf exploit(actfax_import_users_bof) > exploit

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