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passwd

Posted on 2000-03-06
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Last Modified: 2010-04-21
I have been working with tcl and expect trying to get an html page to change a users name and password for them.

Either I did something or the expect program did something.

Now when I log on to the Unix box and type passwd I get the following response:

passwd: Changing password for 'username'
Permission denied

However, when I log on as root it still works.

Can anyone help me?
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Question by:afpcos
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by:jlevie
ID: 2588984
Try executing passwd with the absolute path, e.g., /bin/passwd. I'll bet your expect script is named passwd and it's being found before the system copy (like when "." is in your path ahead of everything else).
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by:afpcos
ID: 2589122
jlevie...

I get the same response from the system when I enter /bin/passwd.
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jlevie earned 100 total points
ID: 2589490
Rats, it's not going to be nice & easy...

What Unix are you using? The ones I have direct access to (Solaris, Linux & Irix) all show passwd to be owned by root and suid to root. Perhaps the ownership/mode of the passwd executable has changed. Also possible is that your passwd isn't actually in /bin and you're not executing the actual passwd executable. What did you name your expect script? If you do "file /bin/passwd" what does it say?

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by:freesource
ID: 2590284
I wouldn't be too surprised if the permissions are wrong on the actual passwd file, check that, too.
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by:freesource
ID: 2590293
for the above .. i.e. not the executable, but where the passwords are written.
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by:jlevie
ID: 2590343
Re: freesource's comment... Good point, we don't yet know which Unix it is and how it would behave if the perms on /etc/passwd [and maybe shadow] weren't right. /etc/password typically is owned by root and mode rw-r--r--, shadow r--------. I know that Solaris, Linux & Irix don't appear to care ('cause I just tried with the perms wrong), but...
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by:samri
ID: 2590813
afpcos,

Just wandering: are you trying to change you own password or sombody else password?  Only root (or root equivalent) are allowed to change other users password.

And from the browser, the script is running under what userid.  Normally, the CGI scripts will be executed under the WEB server UID (which is normally nobody).  If this is the case, try to get your scripts to be suid root, and check your web server configuration on how this could be achieved.

good luck,

samri
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Expert Comment

by:cartoon022100
ID: 2592198
Hi,
from root try editing your /etc/passwd file to remove the encrypted password
after writing try to logon.May work :-)
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