SMTP settings

#
# (C) Tenable Network Security, Inc.
#

# This script was written by Michel Arboi <[email protected]>
# and merged with third_party_domain.nasl, which was written by
# Renaud Deraison <[email protected]>
#
# SMTP is defined by RFC 2821. Messages are defined by RFC 2822

# @PREFERENCES@

include( 'compat.inc' );

default_domain = "example.edu";

if(description)
{
  script_id(11038);
  script_version ("$Revision: 1.13 $");
  script_cvs_date("$Date: 2017/05/05 17:46:22 $");

  script_name(english:"SMTP settings");
  script_summary(english:"SMTP settings.");

  script_set_attribute(attribute:"synopsis", value:
"Sets the parameters used by other SMTP checks.");
  script_set_attribute(attribute:"description", value:
"This plugin sets various SMTP parameters because several checks need
to use a third-party host/domain name in order to work properly. The
checks that rely on this are SMTP or DNS relay checks. By default,
'example.edu' is being used for this purpose. However, under some
circumstances, this may leak packets from your network to this domain,
thus compromising the privacy of your tests. While the owner of
example.edu is not known to keep logs of such packet traces, you may
want to change this value to maximize your privacy.

Note that you absolutely need this option to be set to a third-party
domain. This means a domain that has nothing to do with the domain
name of the network you are testing.");
  script_set_attribute(attribute:"see_also", value:"http://www.ietf.org/rfc/rfc2821.txt");
  script_set_attribute(attribute:"solution", value:"n/a");
  script_set_attribute(attribute:"risk_factor", value:"None");

  script_set_attribute(attribute:"plugin_publication_date", value: "2002/07/01");

  script_set_attribute(attribute:"plugin_type", value:"settings");
  script_end_attributes();

  script_category(ACT_SETTINGS);
  script_family(english:"Settings");

  script_copyright(english:"This script is Copyright (C) 2002-2017 Tenable Network Security, Inc.");

  script_add_preference(name:"Third party domain :", type:"entry", value:default_domain);
  script_add_preference(name:"From address : ", type:"entry", value:"[email protected]");
  script_add_preference(name:"To address : ", type:"entry", value:"postmaster@[AUTO_REPLACED_IP]");
  # AUTO_REPLACED_IP and AUTO_REPLACED_ADDR are... automatically replaced!

  exit(0);
}

#
# The script code starts here
#

fromaddr = script_get_preference("From address : ");
toaddr = script_get_preference("To address : ");

if (!fromaddr) fromaddr = "[email protected]";
if (! toaddr) toaddr = "postmaster@[AUTO_REPLACED_IP]";

if ("AUTO_REPLACED_IP" >< toaddr) {
  dstip = get_host_ip();
  toaddr = ereg_replace(pattern:"AUTO_REPLACED_IP", string:toaddr,
		replace: dstip);
}
if ("AUTO_REPLACED_ADDR" >< toaddr) {
  dstaddr = get_host_name();
  toaddr = ereg_replace(pattern:"AUTO_REPLACED_ADDR", string:toaddr,
		replace: dstaddr);
}

set_kb_item(name:"SMTP/headers/From", value:fromaddr);
set_kb_item(name:"SMTP/headers/To", value:toaddr);

domain = script_get_preference("Third party domain :");

if(!domain)domain = default_domain;
set_kb_item(name:"Settings/third_party_domain", value:domain);

exit(0);