[BusyBox] Busybox 1.0.0-pre10 and sendmail
tzafrir at technion.ac.il
Mon May 10 18:18:07 UTC 2004
On Mon, May 10, 2004 at 01:54:32PM -0400, Michael Shearer wrote:
> Why Sendmail, good question. Well, it's the defacto SMTP daemon
> isn't it?
Not exactly. Postfix and exim (mostly postfix) are gainig popularity.
I believe almost all linux distros have switched from sendmail to
something else as the default MTA.
> I don't really need all it's features but
What exactly do you need?
* send mail by smtp?
* receieve mail by smtp?
* local delivery?
* filtering of some sorts?
> apart from
> being a hassle to configure, it's stable and secure. I'd welcome
> any other recommendations.
IIRC we had at least about one remote root exploit via sendmail per year
in the recent years. But I'm not sure.
> Why should BB set permissions to '/'? Because right now, that's the
> only way I could get Sendmail to work. Or else it complained that I
> had a World Writeable directory and didn't even want to start.
So, whoever built the system should fix this.
But then again: who mounted the root filesystem?
> I've since figured out the problem. It turns out that this is only
> an issue when mounting the root filesystem over NFS. The directory
> where my rootfs was located was World Writeable... That's why the /
> inherited those permissions. Now, it's debatable whether or not mount
> -t nfs should have changed those back to a+rwx,u-w. (Erik, any comments?)
Didn't the kernel perform the mount?
Tzafrir Cohen +---------------------------+
http://www.technion.ac.il/~tzafrir/ |vim is a mutt's best friend|
mailto:tzafrir at technion.ac.il +---------------------------+
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