#!/usr/bin/perl ############################################################################## # FormMail Version 1.92 # # Copyright 1995-2002 Matt Wright mattw@scriptarchive.com # # Created 06/09/95 Last Modified 04/21/02 # # Matt's Script Archive, Inc.: http://www.scriptarchive.com/ # ############################################################################## # COPYRIGHT NOTICE # # Copyright 1995-2002 Matthew M. Wright All Rights Reserved. # # # # FormMail may be used and modified free of charge by anyone so long as this # # copyright notice and the comments above remain intact. By using this # # code you agree to indemnify Matthew M. Wright from any liability that # # might arise from its use. # # # # Selling the code for this program without prior written consent is # # expressly forbidden. In other words, please ask first before you try and # # make money off of my program. # # # # Obtain permission before redistributing this software over the Internet or # # in any other medium. In all cases copyright and header must remain intact. # ############################################################################## # ACCESS CONTROL FIX: Peter D. Thompson Yezek # # http://www.securityfocus.com/archive/1/62033 # ############################################################################## # Define Variables # # Detailed Information Found In README File. # # $mailprog defines the location of your sendmail program on your unix # # system. The flags -i and -t should be passed to sendmail in order to # # have it ignore single dots on a line and to read message for recipients # $mailprog = '/usr/lib/sendmail -i -t'; # @referers allows forms to be located only on servers which are defined # # in this field. This security fix from the last version which allowed # # anyone on any server to use your FormMail script on their web site. # @referers = ('scriptarchive.com','209.196.21.3'); # @recipients defines the e-mail addresses or domain names that e-mail can # # be sent to. This must be filled in correctly to prevent SPAM and allow # # valid addresses to receive e-mail. Read the documentation to find out how # # this variable works!!! It is EXTREMELY IMPORTANT. # @recipients = &fill_recipients(@referers); # ACCESS CONTROL FIX: Peter D. Thompson Yezek # # @valid_ENV allows the sysadmin to define what environment variables can # # be reported via the env_report directive. This was implemented to fix # # the problem reported at http://www.securityfocus.com/bid/1187 # @valid_ENV = ('REMOTE_HOST','REMOTE_ADDR','REMOTE_USER','HTTP_USER_AGENT'); # Done # ############################################################################## # Check Referring URL &check_url; # Retrieve Date &get_date; # Parse Form Contents &parse_form; # Check Required Fields &check_required; # Send E-Mail &send_mail; # Return HTML Page or Redirect User &return_html; # NOTE rev1.91: This function is no longer intended to stop abuse, that # # functionality is now embedded in the checks made on @recipients and the # # recipient form field. # sub check_url { # Localize the check_referer flag which determines if user is valid. # local($check_referer) = 0; # If a referring URL was specified, for each valid referer, make sure # # that a valid referring URL was passed to FormMail. # if ($ENV{'HTTP_REFERER'}) { foreach $referer (@referers) { if ($ENV{'HTTP_REFERER'} =~ m|https?://([^/]*)$referer|i) { $check_referer = 1; last; } } } else { $check_referer = 1; } # If the HTTP_REFERER was invalid, send back an error. # if ($check_referer != 1) { &error('bad_referer') } } sub get_date { # Define arrays for the day of the week and month of the year. # @days = ('Sunday','Monday','Tuesday','Wednesday', 'Thursday','Friday','Saturday'); @months = ('January','February','March','April','May','June','July', 'August','September','October','November','December'); # Get the current time and format the hour, minutes and seconds. Add # # 1900 to the year to get the full 4 digit year. # ($sec,$min,$hour,$mday,$mon,$year,$wday) = (localtime(time))[0,1,2,3,4,5,6]; $time = sprintf("%02d:%02d:%02d",$hour,$min,$sec); $year += 1900; # Format the date. # $date = "$days[$wday], $months[$mon] $mday, $year at $time"; } sub parse_form { # Define the configuration associative array. # %Config = ('recipient','', 'subject','', 'email','', 'realname','', 'redirect','', 'bgcolor','', 'background','', 'link_color','', 'vlink_color','', 'text_color','', 'alink_color','', 'title','', 'sort','', 'print_config','', 'required','', 'env_report','', 'return_link_title','', 'return_link_url','', 'print_blank_fields','', 'missing_fields_redirect',''); # Determine the form's REQUEST_METHOD (GET or POST) and split the form # # fields up into their name-value pairs. If the REQUEST_METHOD was # # not GET or POST, send an error. # if ($ENV{'REQUEST_METHOD'} eq 'GET') { # Split the name-value pairs @pairs = split(/&/, $ENV{'QUERY_STRING'}); } elsif ($ENV{'REQUEST_METHOD'} eq 'POST') { # Get the input read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'}); # Split the name-value pairs @pairs = split(/&/, $buffer); } else { &error('request_method'); } # For each name-value pair: # foreach $pair (@pairs) { # Split the pair up into individual variables. # local($name, $value) = split(/=/, $pair); # Decode the form encoding on the name and value variables. # # v1.92: remove null bytes # $name =~ tr/+/ /; $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg; $name =~ tr/\0//d; $value =~ tr/+/ /; $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg; $value =~ tr/\0//d; # If the field name has been specified in the %Config array, it will # # return a 1 for defined($Config{$name}}) and we should associate # # this value with the appropriate configuration variable. If this # # is not a configuration form field, put it into the associative # # array %Form, appending the value with a ', ' if there is already a # # value present. We also save the order of the form fields in the # # @Field_Order array so we can use this order for the generic sort. # if (defined($Config{$name})) { $Config{$name} = $value; } else { if ($Form{$name} ne '') { $Form{$name} = "$Form{$name}, $value"; } else { push(@Field_Order,$name); $Form{$name} = $value; } } } # The next six lines remove any extra spaces or new lines from the # # configuration variables, which may have been caused if your editor # # wraps lines after a certain length or if you used spaces between field # # names or environment variables. # $Config{'required'} =~ s/(\s+|\n)?,(\s+|\n)?/,/g; $Config{'required'} =~ s/(\s+)?\n+(\s+)?//g; $Config{'env_report'} =~ s/(\s+|\n)?,(\s+|\n)?/,/g; $Config{'env_report'} =~ s/(\s+)?\n+(\s+)?//g; $Config{'print_config'} =~ s/(\s+|\n)?,(\s+|\n)?/,/g; $Config{'print_config'} =~ s/(\s+)?\n+(\s+)?//g; # Split the configuration variables into individual field names. # @Required = split(/,/,$Config{'required'}); @Env_Report = split(/,/,$Config{'env_report'}); @Print_Config = split(/,/,$Config{'print_config'}); # ACCESS CONTROL FIX: Only allow ENV variables in @valid_ENV in # # @Env_Report for security reasons. # foreach $env_item (@Env_Report) { foreach $valid_item (@valid_ENV) { if ( $env_item eq $valid_item ) { push(@temp_array, $env_item) } } } @Env_Report = @temp_array; } sub check_required { # Localize the variables used in this subroutine. # local($require, @error); # The following insures that there were no newlines in any fields which # # will be used in the header. # if ($Config{'subject'} =~ /(\n|\r)/m || $Config{'email'} =~ /(\n|\r)/m || $Config{'realname'} =~ /(\n|\r)/m || $Config{'recipient'} =~ /(\n|\r)/m) { &error('invalid_headers'); } if (!$Config{'recipient'}) { if (!defined(%Form)) { &error('bad_referer') } else { &error('no_recipient') } } else { # This block of code requires that the recipient address end with # # a valid domain or e-mail address as defined in @recipients. # $valid_recipient = 0; foreach $send_to (split(/,/,$Config{'recipient'})) { foreach $recipient (@recipients) { if ($send_to =~ /$recipient$/i) { push(@send_to,$send_to); last; } } } if ($#send_to < 0) { &error('no_recipient') } $Config{'recipient'} = join(',',@send_to); } # For each require field defined in the form: # foreach $require (@Required) { # If the required field is the email field, the syntax of the email # # address if checked to make sure it passes a valid syntax. # if ($require eq 'email' && !&check_email($Config{$require})) { push(@error,$require); } # Otherwise, if the required field is a configuration field and it # # has no value or has been filled in with a space, send an error. # elsif (defined($Config{$require})) { if ($Config{$require} eq '') { push(@error,$require); } } # If it is a regular form field which has not been filled in or # # filled in with a space, flag it as an error field. # elsif (!defined($Form{$require}) || $Form{$require} eq '') { push(@error,$require); } } # If any error fields have been found, send error message to the user. # if (@error) { &error('missing_fields', @error) } } sub return_html { # Local variables used in this subroutine initialized. # local($key,$sort_order,$sorted_field); # Now that we have finished using form values for any e-mail related # # reasons, we will convert all of the form fields and config values # # to remove any cross-site scripting security holes. # local($field); foreach $field (keys %Config) { $safeConfig{$field} = &clean_html($Config{$field}); } foreach $field (keys %Form) { $Form{$field} = &clean_html($Form{$field}); } # If redirect option is used, print the redirectional location header. # if ($Config{'redirect'}) { print "Location: $safeConfig{'redirect'}\n\n"; } # Otherwise, begin printing the response page. # else { # Print HTTP header and opening HTML tags. # print "Content-type: text/html\n\n"; print "\n \n"; # Print out title of page # if ($Config{'title'}) { print "$safeConfig{'title'}\n" } else { print "Thank You\n" } print " \n \n
\n"; # Print custom or generic title. # if ($Config{'title'}) { print "

$safeConfig{'title'}

\n" } else { print "

Thank You For Filling Out This Form

\n" } print "
\n"; print "Below is what you submitted to $safeConfig{'recipient'} on "; print "$date


\n"; # If a sort order is specified, sort the form fields based on that. # if ($Config{'sort'} =~ /^order:.*,.*/) { # Set the temporary $sort_order variable to the sorting order, # # remove extraneous line breaks and spaces, remove the order: # # directive and split the sort fields into an array. # $sort_order = $Config{'sort'}; $sort_order =~ s/(\s+|\n)?,(\s+|\n)?/,/g; $sort_order =~ s/(\s+)?\n+(\s+)?//g; $sort_order =~ s/order://; @sorted_fields = split(/,/, $sort_order); # For each sorted field, if it has a value or the print blank # # fields option is turned on print the form field and value. # foreach $sorted_field (@sorted_fields) { local $sfname = &clean_html($sorted_field); if ($Config{'print_blank_fields'} || $Form{$sorted_field} ne '') { print "$sfname: $Form{$sorted_field}

\n"; } } } # Otherwise, use the order the fields were sent, or alphabetic. # else { # Sort alphabetically if requested. if ($Config{'sort'} eq 'alphabetic') { @Field_Order = sort @Field_Order; } # For each form field, if it has a value or the print blank # # fields option is turned on print the form field and value. # foreach $field (@Field_Order) { local $fname = &clean_html($field); if ($Config{'print_blank_fields'} || $Form{$field} ne '') { print "$fname: $Form{$field}

\n"; } } } print "


\n"; # Check for a Return Link and print one if found. # if ($Config{'return_link_url'} && $Config{'return_link_title'}) { print "