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Date:      Mon, 7 Oct 2002 13:50:25 +0100
From:      Burhan Nazir <burhan@blueyonder.co.uk>
To:        chat@freebsd.org
Subject:   which <email_domain_name> - SECURITY BREACH?
Message-ID:  <20021007125025.GG7713@host-123.syseng.cableinet.net>

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Hello,

It seems that by
sending the "which" command to majordomo, it can return a list of email
addresses subscribed to all lists matching any domain name that you specify.

This has huge spamming implications 
For example by doing:

which freebsd.org

to majordomo@freebsd.org, will return a list of ALL subscribers with
domain freebsd.org.  Is this a security flaw with majordomo?  By
disabling the "which" customers loose the ability to query which lists they
are subscribe to.

This seems weird?

-Burhan

-- 
FreeBSD 4.6.2-RELEASE * http://www.freebsd.org
1:35PM  up 45 days, 23:12, 11 users, load averages: 0.00, 0.00, 0.00

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