Do not allow bypassing users .profile Post: 302938635

Sponsored Content

Operating Systems AIX Do not allow bypassing users .profile Post 302938635 by omonoiatis9 on Wednesday 18th of March 2015 05:59:19 AM

03-18-2015

Registered User

@Don Cragun: Unfortunately I cannot use rlogin because our security department said that rlogin contains security vulnerabilities which can be exploited so we had to disable the service from our servers. Anyway reading your last post I still think that this will not prevent users from doing what they tried to do before. Even if I remove putty from their PCs and give them a different tool to connect on server, nothing stops them from download putty and use it. and if they do that it doesn't matter what kind of shell they are using. Even if I set their initial shell to /bin/myscript as long as they have putty they can still execute remote ssh command and run bash with --noprofile option.

@XrAy: Thank you for your reply. well I'm actually testing all the suggestions that people posted here. this is what I said that I will do and this is what I'm doing right now. I didn't focus in just one thing. I'm trying to see what is the best solution to implement or even a combination of things. this is what I found until now:

Obviously when I create a custom base version of bash solves the problem of remote execution of --noprofile command. but as you said I have to be alert that every time I need to upgrade bash I need to have in mind that I will still exclude the --noprofile option.
ForceCommand is doing a great job on sshd_config. I find out that when I use this option it solves all the issues that I faced.
1. The user cannot execute the bash --noprofile option even with the original version of bash
2. The user cannot do sftp and ssh to server and get command line
3. The user cannot use scp to send or receive files from server.
I couldn't make /etc/profile modification work.

I test it for one user but it doesn't seem to work. The user can still execute the remote command he wants through putty and can connect through sftp and use scp also.

Last edited by rbatte1; 03-18-2015 at 07:44 AM.. Reason: Broke up a single block of text, added LIST=1 & LIST=a tags, spelling, capital letters, apostrophes, bold for command names and ICODE tags for options etc.

omonoiatis9

View Public Profile for omonoiatis9

Find all posts by omonoiatis9

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

users with same .profile

guys i have a unix user (say "x") which is also an application owner ..thru this user i manage most (90 %) of my tasks related to application i.e application down/up,processes stop/start etc..in short i manage my "tuxedo" via this user.. now i want a new user to be created (on my name) which...

2. AIX

"ksh -" as login shell bypassing .profile

Hi all, I am currently trying to tell /bin/ksh to behave like a login shell. I am invoking it from an interactive shell. In the documentation is stated, that calling it with exec ksh - it should behave like a login shell, work 1st on /etc/profile, ~/.profile and so on. I tried that with...

3. UNIX for Advanced & Expert Users

How can I get sudo -u <username> to load that users profile on HP-UX

I am running a serverapplication on a HP-UX machine where I need to handle some of the commands as a specified user called "druser". When I log on as this user with the command; sudo -u druser -sit starts an instance of the shell as that user. However, it doesn't load that users .profile from...

4. AIX

SSH and a users .profile

How do I get a command like "ssh Theuser@host date" to execute the /home/Theuser/.profile before executing the "date" command?

5. Shell Programming and Scripting

sourcing .profile for other users

Hi Team, Thank you for your time. i have a situation where the user IDs of the applicatio users have been locked down to Read only. Hence I am writing a script to invoke their old .profile every time they login. My problem is : when i run . $userpath/.profile from within the ksh script...

6. UNIX for Advanced & Expert Users

Bypassing blocking of websites...

So my workplace uses websense to block certain websites. I read while researching firesheep, that you can somehow bypass that by creating a proxy, and thus: #1 protect yourself from people using firesheep (if using unsecure hot-spot) and #2 or visit un-approved websites at work. I...

7. Shell Programming and Scripting

Users who desire to have their .profile executed must explicitly do so in the crontab entry. Why?

The .profile file should be read when the user logs in. So, there should be no need to execute .profile file again in a cron job (since the cron job is run after the user logs in). Doesn't the cron require login from the user. Then, from where does the cron execute? Please help!!

8. IP Networking

Bypassing My Company Firewall!

Hi! My organization has put a Firewall which eat up a lot of important data access. So I came to know about SSH Tunneling to bypass the Firewall. I will have to setup a free access SSH server to tunnel data access through PUTTY or OpenSSH. The problem is that I don't know about any free...

9. Solaris

Remove a given profile from a users account

Hi Guys, I was studying RBAC and I gave a profile to a user . I have not seen anywhere that shows how to remove the profile from the users account. Can anyone show me how to remove a given profile from a users account? Thanks alot guys.

10. HP-UX

Create a new user from using existing users profile

Hello, Just wanting to know if it is possible. Also I am new to command line. I am running 5.1b, if that matters. Thanks in advance

LEARN ABOUT POSIX

sftp-server

sftp-server(1M) 					  System Administration Commands					   sftp-server(1M)

NAME

       sftp-server - SFTP server subsystem

SYNOPSIS

       /usr/lib/ssh/sftp-server

DESCRIPTION

       sftp-server implements the server side of the SSH File Transfer Protocol as defined in the IETF draft-ietf-secsh-filexfer.

       sftp-server is a subsystem for sshd(1M) and must not be run directly. There are no options or config settings.

       To enable the sftp-server subsystem for sshd add the following to /etc/ssh/sshd_config:

       Subsystem   sftp     /usr/lib/ssh/sftp-server

       See sshd_config(4) for a description of the format and contents of that file.

       There is no relationship between the protocol used by sftp-server and the FTP protocol (RFC 959) provided by in.ftpd.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion.

       >0	An error occurred.

FILES

       /usr/lib/sftp-server

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsshdu 		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sftp(1), ssh(1), ssh-add(1), ssh-keygen(1), sshd(1M), sshd_config(4), attributes(5)

       To  view  license  terms,  attribution,	and  copyright	for OpenSSH, the default path is /var/sadm/pkg/SUNWsshdr/install/copyright. If the
       Solaris operating environment has been installed anywhere other than the default, modify the given path to access the file at the installed
       location.

AUTHOR

       Markus Friedl

SunOS 5.10							    30 Jul 2003 						   sftp-server(1M)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

users with same .profile

Discussion started by: abhijeetkul

2. AIX

"ksh -" as login shell bypassing .profile

Discussion started by: zaxxon

3. UNIX for Advanced & Expert Users

How can I get sudo -u <username> to load that users profile on HP-UX

Discussion started by: ukiome

4. AIX

SSH and a users .profile

Discussion started by: IL-Malti