Rapid7 Vulnerability & Exploit Database

Pure-FTPd External Authentication Bash Environment Variable Code Injection (Shellshock)

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Pure-FTPd External Authentication Bash Environment Variable Code Injection (Shellshock)



This module exploits the Shellshock vulnerability, a flaw in how the Bash shell handles external environment variables. This module targets the Pure-FTPd FTP server when it has been compiled with the --with-extauth flag and an external Bash script is used for authentication. If the server is not set up this way, the exploit will fail, even if the version of Bash in use is vulnerable.


  • Stephane Chazelas
  • Frank Denis
  • Spencer McIntyre


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/multi/ftp/pureftpd_bash_env_exec
msf exploit(pureftpd_bash_env_exec) > show targets
msf exploit(pureftpd_bash_env_exec) > set TARGET < target-id >
msf exploit(pureftpd_bash_env_exec) > show options
    ...show and set options...
msf exploit(pureftpd_bash_env_exec) > exploit

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