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To: cygwin AT cygwin DOT com
From: "D. Boland" <daniel AT boland DOT nl>
Subject: Re: The eternal uid issue
Date: Thu, 31 Jul 2014 14:53:05 +0200
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Message-ID: <53DA3C31.3ACB14DF@boland.nl>
References: <20140723152357 DOT GA24446 AT calimero DOT vinschen DOT de> <53D0AD3A DOT 1FDF0B3F AT boland DOT nl> <20140724135222 DOT GD12212 AT calimero DOT vinschen DOT de> <53D17DCD DOT 726524E0 AT boland DOT nl> <20140725124200 DOT GC8725 AT calimero DOT vinschen DOT de> <53D604BC DOT 1CBD4557 AT boland DOT nl> <20140728091409 DOT GA25860 AT calimero DOT vinschen DOT de> <53D6373A DOT 193E3E47 AT boland DOT nl> <20140728115308 DOT GA11725 AT calimero DOT vinschen DOT de> <53D7A371 DOT BB5912EB AT boland DOT nl> <20140730131047 DOT GL25860 AT calimero DOT vinschen DOT de>
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Corinna Vinschen wrote:
> 
> On Jul 29 15:36, D. Boland wrote:
> > Corinna Vinschen wrote:
> > > The permissions of the home folder are set to 01777 by default (S_ISVTX
> > > bit!).  Since we can't rely on central administration for Cygwin, this
> > > allows a user to create her own homedir automatically at first start of
> > > a Cygwin shell.
> > >
> > > You might consider to disable this full patch check in sendmail for
> > > Cygwin.  Is there some configuration flag, maybe?
> > >
> >
> > If I make the 'Users' group owner of the /home folder and remove the world-writable
> > bit, Sendmail doesn't complain anymore. I found out that everybody who is logged on,
> > will be put in the 'Users' group anyway.
> 
> Uhm... that works for you, but you can't rely on that for a sendmail
> package.  You'd have to deal with the default 01777 /home as well.

Yes, yes, I know. Cygwin shouldn't want to lock their users out of their own system.
Sendmail is a real b&^ch with security. This project cost me 2 1/2 weeks straight,
trying to figure out a way to accomodate its strict impersonation rules on a system
which has multiple root users. But I did it. No hacking in the sendmail source code.

Anyway, today I tested it succesfully on my Win7 machine (32bit Cygwin), but no
complaining from Sendmail, even with a home folder which is group- and world
writable. Strange.

Cincerely,
Daniel


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