[Bug 1721746] [NEW] [If member-email known] Malformed "From:" header accepted -> anyone can post to list.
1721746 at bugs.launchpad.net
Fri Oct 6 06:38:25 EDT 2017
*** This bug is a security vulnerability ***
Private security bug reported:
because we got some spam from outside, but with email-adress of a list-
member lately, we found after an investigation that the E-Mail Header
From: "memberuseremail@" <memberuserdomain.tld somerandomspamemail.tld>
will be accepted by mailman and posted to the list. So if the spammer
knows a valid member-emailadress it is possible to send emails to the
I don't know if this is fixed already and i have to poke the ubuntu team
Ubuntu 16.04 LTS
Mailman Version: 1:2.1.20-1ubuntu0.1
Postfix Version: 3.1.0-3
** Affects: mailman
** Tags: email sender
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[If member-email known] Malformed "From:" header accepted -> anyone
can post to list.
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