Re: [PATCH 2/3] Security: Implement disablenetwork semantics. (v4)

[David Wagner]

Pavel Machek  wrote:
>> On Tue, 12 Jan 2010 08:59:27 +0100, Pavel Machek said:
>> > Well, maybe, but mailer system where first user starts is as a daemon
>> > makes sense...
>> 
>> Does it?  How do you get port 25 open for listening if the first user isn't
>> root?  Most *actual* schemes to "launch at first use" that require privs for
>> something have used inetd or similar - that program exists for a
>> *reason*.
>
>Remember sendmail is setuid root... so it already has the permissions.

sendmail hasn't been setuid root on my system for (what feels like)
a long time; rather, it is setgid to a special group.

$ ls -l /usr/sbin/sendmail.sendmail 
-rwxr-sr-x 1 root smmsp 841528 2008-03-29 05:27 /usr/sbin/sendmail.sendmail*
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