diff options
Diffstat (limited to 'Mailman/Cgi/subscribe.py')
| -rwxr-xr-x[-rw-r--r--] | Mailman/Cgi/subscribe.py | 46 |
1 files changed, 41 insertions, 5 deletions
diff --git a/Mailman/Cgi/subscribe.py b/Mailman/Cgi/subscribe.py index 7c49c51c..ab5c7cd8 100644..100755 --- a/Mailman/Cgi/subscribe.py +++ b/Mailman/Cgi/subscribe.py @@ -1,4 +1,4 @@ -# Copyright (C) 1998-2011 by the Free Software Foundation, Inc. +# Copyright (C) 1998-2015 by the Free Software Foundation, Inc. # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License @@ -20,6 +20,7 @@ import sys import os import cgi +import time import signal from Mailman import mm_cfg @@ -63,7 +64,7 @@ def main(): # Send this with a 404 status. print 'Status: 404 Not Found' print doc.Format() - syslog('error', 'No such list "%s": %s\n', listname, e) + syslog('error', 'subscribe: No such list "%s": %s\n', listname, e) return # See if the form data has a preferred language set, in which case, use it @@ -117,9 +118,44 @@ def process_form(mlist, doc, cgidata, lang): # Canonicalize the full name fullname = Utils.canonstr(fullname, lang) # Who was doing the subscribing? - remote = os.environ.get('REMOTE_HOST', - os.environ.get('REMOTE_ADDR', - 'unidentified origin')) + remote = os.environ.get('HTTP_FORWARDED_FOR', + os.environ.get('HTTP_X_FORWARDED_FOR', + os.environ.get('REMOTE_ADDR', + 'unidentified origin'))) + # Are we checking the hidden data? + if mm_cfg.SUBSCRIBE_FORM_SECRET: + now = int(time.time()) + # Try to accept a range in case of load balancers, etc. (LP: #1447445) + if remote.find('.') >= 0: + # ipv4 - drop last octet + remote1 = remote.rsplit('.', 1)[0] + else: + # ipv6 - drop last 16 (could end with :: in which case we just + # drop one : resulting in an invalid format, but it's only + # for our hash so it doesn't matter. + remote1 = remote.rsplit(':', 1)[0] + try: + ftime, fhash = cgidata.getvalue('sub_form_token', '').split(':') + then = int(ftime) + except ValueError: + ftime = fhash = '' + then = 0 + token = Utils.sha_new(mm_cfg.SUBSCRIBE_FORM_SECRET + + ftime + + mlist.internal_name() + + remote1).hexdigest() + if ftime and now - then > mm_cfg.FORM_LIFETIME: + results.append(_('The form is too old. Please GET it again.')) + if ftime and now - then < mm_cfg.SUBSCRIBE_FORM_MIN_TIME: + results.append( + _('Please take a few seconds to fill out the form before submitting it.')) + if ftime and token != fhash: + results.append( + _("The hidden token didn't match. Did your IP change?")) + if not ftime: + results.append( + _('There was no hidden token in your submission or it was corrupted.')) + results.append(_('You must GET the form before submitting it.')) # Was an attempt made to subscribe the list to itself? if email == mlist.GetListEmail(): syslog('mischief', 'Attempt to self subscribe %s: %s', email, remote) |