full-disclosure - Block notification / bounce mails (as in DDOS)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20040401194651.5D7427F35@mail-terminator.cudeso.be>
From: koen4security at hotmail.com (Koen)
Subject: Block notification / bounce mails (as in DDOS)

Tomasz Konefal wrote:
>   first off, the From: header would not normally be the one emails get 
> bounced to.  rather, it would be the "MAIL FROM" envelope header.  in 
> any case, my 'solution' would be to temporarily drop all mail destined 
> to this deluged account to /dev/null and set up a new account for the 
> busted user.  you could alternatively set up a "user relocated" reply on 
> the server or just kill the account altogether and send responses of "no 
> such local user".  you get the general idea.  not a great solution, but 
> only one person's email is crapped out instead of everyone's.  when the 
> DDoS looks like it's petering away you can set up an alias from the old 
> to the new account to reenable legitimate mails to get to the user.

Hi,
A "user relocated" reply would only increase the problem. The problem isn't 
limited to one mailbox or user-account but rather to "all" mailboxes.
Thanks anyway