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Groups > comp.unix.programmer > #870
| From | jt@toerring.de (Jens Thoms Toerring) |
|---|---|
| Newsgroups | comp.unix.programmer |
| Subject | Re: Why user can change password? |
| Date | 2011-06-29 09:55 +0000 |
| Organization | Freie Universitaet Berlin |
| Message-ID | <970b56FivfU1@mid.uni-berlin.de> (permalink) |
| References | <8d6a4a86-6fdf-4183-bfba-5ed322a98195@u28g2000yqf.googlegroups.com> |
Mateusz_madi <madi.czadi@gmail.com> wrote:
> Hi, why usre cna change his pasword using passwd if he don't have
> access to /etc/shadow ?
Because the 'passwd' program has special privileges when it's
running. If you do
> ls -l /usr/bin/passwd
-rwsr-xr-x 1 root root 42856 2011-02-14 23:11 /usr/bin/passwd
you will notice the 's' instead of an 'x' in the permissions
for the owner of this program (root). This indicates that this
program is 'setuid'-ed, i.e. it will run with the permissions
of the owner of the program instead your more restricted user
permissions. A Google search for 'setuid' will give you a lot
of additional information.
Regards, Jens
--
\ Jens Thoms Toerring ___ jt@toerring.de
\__________________________ http://toerring.de
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Why user can change password? Mateusz_madi <madi.czadi@gmail.com> - 2011-06-29 02:44 -0700
Re: Why user can change password? jt@toerring.de (Jens Thoms Toerring) - 2011-06-29 09:55 +0000
Re: Why user can change password? Ben Finney <ben+unix@benfinney.id.au> - 2011-06-29 22:36 +1000
Re: Why user can change password? jt@toerring.de (Jens Thoms Toerring) - 2011-06-29 15:03 +0000
Re: Why user can change password? John Gordon <gordon@panix.com> - 2011-06-29 14:41 +0000
Re: Why user can change password? Golden California Girls <gldncagrls@aol.com.mil> - 2011-06-29 18:42 -0700
Re: Why user can change password? Barry Margolin <barmar@alum.mit.edu> - 2011-06-29 22:29 -0400
Re: Why user can change password? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-06-29 22:29 -0400
Re: Why user can change password? gordonb.h6afl@burditt.org (Gordon Burditt) - 2011-06-29 22:10 -0500
Re: Why user can change password? Nobody <nobody@nowhere.com> - 2011-06-30 18:10 +0100
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