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How to Audit User Commands When sudo su - to Another User

Posted on 2011-09-28
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Last Modified: 2012-06-21
We have a team of people that login to unix servers as their individual ID, then need to "sudo su - shareduser" to a shared user ID.  It is possible that you could have several people logged into the same server at the same time that has switched to the shared user.  The question is - is it possible to keep an audit trail of the commands that each individual user runs as the shared ID?  Is so, can you tell me how this is done?  We are using two flavors of UNIX, AIX and RedHat Linux.
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Question by:lphillips
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Expert Comment

by:farzanj
ID: 36813150
Normally script command is used.  Did you try that?

script filename


And then you log everything.  You should script in a folder where everyone can write.  I am not sure if it would persist su but it is worth trying at least.

You will have to type exit twice at the end, once to revert to original account and second to terminate script command.
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by:woolmilkporc
ID: 36814300
Does it have to be "sudo su -"?

Wouldn't it be sufficient runnig "sudo -u shareduser some_command" ?

Of course this will require a bit more effort in setting up the sudoers file, but on the other hand you can have a perfect audit trail this way.

wmp

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Author Comment

by:lphillips
ID: 36814384
woolmilkporc - is it possible to setup it up where any command/script in a certain directory can be run?  For example if we had:

/allmycommands/bin/

And there were lots of scripts, AND they need to have arguments passed on the command line, is this doable?  How would that look in the sudoers file?
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woolmilkporc earned 500 total points
ID: 36814537
Yes, that's simple. Let's assume there is a group "individuals" where all concerned users belong to.

Add to the sudoers file using "visudo":

Defaults:%individuals   syslog=local7
%individuals ALL=(shareduser) NOPASSWD:/allmycommands/bin/


The "individuals" members are allowed to run eyerything (scripts/commands) which are in /allmycommands/bin/
with any number of arguments under the credentials of "shareduser", like this:

sudo -u shareduser /allmycommands/bin/somescript parm1 parm2 parm3

The example sudoers entry above isolates the log data of this particular group by using "local7" as the log facility.
Choose a different one if local7 is already in use at your system(s).

Add to /etc/syslog.conf:

local7.* /var/adm/individuals.sudolog

issue touch /var/adm/individuals.sudolog

and restart syslogd (AIX: refresh -s syslogd).

wmp

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Author Closing Comment

by:lphillips
ID: 36814567
thank you!
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