Date: Fri, 22 Mar 2002 15:36:57 -0500 From: Anthony Schneider <aschneid@mail.slc.edu> To: Fernan Aguero <fernan@iib.unsam.edu.ar> Cc: FreeBSD Security <freebsd-security@FreeBSD.ORG> Subject: Re: su -c user command not working Message-ID: <20020322153657.A3593@mail.slc.edu> In-Reply-To: <20020322165816.A561@iib.unsam.edu.ar>; from fernan@iib.unsam.edu.ar on Fri, Mar 22, 2002 at 04:58:17PM -0300 References: <20020322165816.A561@iib.unsam.edu.ar>
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the -c flag passes a command to the shell of the user you are su'ing to,
so since user man's shell is /sbin/nologin, /sbin/nologin is (according
to su) supposed to interpret the command 'catman' and execute it,
however /sbin/nologin doesn't interpret commands, it just prints the
message "This account is currently unavailable" (just as it did for you)
and then exits. for 'su -c' to work, the user you are su'ing to needs
something to actually interpret the command. i suggest you either change
that user's passwd info to have such a shell, or you to an account that
has such a shell.
as for xterm reading your .cshrc, you need to pass it the option -ls,
which tells it to launch a login shell.
-Anthony.
On Fri, Mar 22, 2002 at 04:58:17PM -0300, Fernan Aguero wrote:
> I wonder if this is security related.
>
> Basically I'd like to know if this has been disabled for security
> reasons.
>
> According to su(1) you can do something like:
> su man -c catman
> Runs the command catman as user man. You will be asked for man's
> password unless your real UID is 0.
>
> However, I am refused to run the example in this way (I am root, of
> course).
>
> root> su man -c catman
> This account is currently not available.
>
> man is listed in /etc/passwd with /sbin/nologin as shell
>
> I'd also like to know why my ~/.cshrc is not read when I log in or
> open an xterm. I have to source it every time. Is this also related to
> the previous issue (disabled for some reason?)
>
> I am running FreeBSD-4.3 (RELENG_4_3), and except for some minor
> things haven't done major configuration or editing of system base
> defaults.
>
> Thanks in advance for any help or pointers,
>
> Fernan
>
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-security" in the body of the message
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