This patch is prompted by discussion on the mailman-
developers list won the following subject:
Re: [Mailman-Developers] bugtraq submission warning:
email address harvesting exploit
For those with deep concerns about email address harvesting
this patch offers a more aggressive masking of email
addresses in Mailman mail archive files.
The patch modifes two files in the standard Mailman
distribution: Mailman/Defaults.py and Mailman/Cgi/
private.py and can be applied using the following command
from within the Mailman build directory:
path -p1 < path-to-patch-file
It would be fairly trivial to make enabling this feature per-
list configurable rather than it being a site admin decision
and I will enhance this patch for that purpose if people show
an interest in it being done.
The following notes about the patch can be found in
Defaults.py. Rather idiosyncratically most of the operational
elements of this patch are in that file. My reasoning behind
this decision is that if people want to fool with the regexes
that are at the heart of this patch they can see what will be
affected by the changes more readily if the related bits are
in the same place.
#####
# Anti-spam email address harvesting prevention measures.
#
# These measures are to limit the ability of spam generators
to acquire
# email address from archived material in Mailman's list
archives.
# Implementation is via a dynamic search and replace for
email
# addresses, appearing in files of MIME type text/html or
text/plain, as
# those files are requested. The underlying archive file
content as
# generated by the archiving software remains unchanged.
#
# The implementation requires that archive files are all
delivered by a
# modified private.py CGI script which only requires user
authentication
# if the list whose archive material is being requested is set
up as a private
# list. In order to get public archives served by private.py a
RewriteRule
# like this:
#
# RewriteRule ^/pipermail/(.*) /mailman/private/$1 [PT]
#
# needs to be used in the Apache httpd.conf to transparently
redirect
# public arechive file requests.
#
# When email addresses are found, the domain part of the
addressed is replaced
# with a string of 'x' characters. If the local part of the
address appears to
# have been VERP'ed then the VERP information is similarly
obscured. This is
# a fairly brutal set of irreversible modifications to any
email addresses in
# the returned text and will break any mailto: links in the
text.
#
# Th eamil address regex looks for either an '@' character
or its HTML escaped
# version '%40' as the local-part/domain separator. You
should set
# ARCHIVER_OBSCURES_EMAILADDRS = 0 and run bin/arch
to rebuild existing archives
# to prevent that feature interfering with the operation of
these harvesting
# prevention measures.
#
# If you decide to change the regexes then copy all of this
stuff into
# mm_cfg.py and make the changes there.
#
#####
The file antispam-