Great Circle Associates Firewalls
(September 1995)
 

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Subject: Re: Any known security holes in the "vacation" program
From: nreadwin @ london . micrognosis . com (Neil Readwin)
Date: Fri, 15 Sep 1995 22:50:43 +0100 (BST)
To: yevaud @ netcom . com (Karl Wiebe)
Cc: firewalls @ greatcircle . com
In-reply-to: <199509151653 . JAA18708 @ netcom21 . netcom . com> from "Karl Wiebe" at Sep 15, 95 09:53:51 am

> >[...] the "/usr/ucb/vacation" program under SunOS 4.1.x. 
> 
> One reason is simply that vacation, being designed for the simple "I'm on
> vacation" setup, will only respond *once* to email from a given address;
> this is why it maintains its "database".

But it only maintains the database if you create it first. Otherwise it
replies to every mail.

Try it - set up a 'dead' account and change the .forward to run vacation.
Ignore for weeks until a cron job for the account sends mail to the owner.
Notice how rapidly /var/log fills up with sendmail syslog output. Neil.
-- 
 nreadwin @
 micrognosis .
 co .
 uk       Phone: +1 908 855 1221 x519
 Anything is a cause for sorrow that my mind or body has made


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From: cmcmanis @ scndprsn . Eng . Sun . COM (Chuck McManis)
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