<html><head></head><body><div>I like the sudo (used it many times) but the binaries are changing daily. Yes, can grant sudo as user foo to contents of folder bar and that may be part of the solution.</div><div><br></div><div>On Mon, 2016-05-16 at 17:02 -0400, DJ-Pfulio wrote:</div><blockquote type="cite"><pre>sudo isn't just to get access to the root account. It works great to
access other accounts, if configured for that.
I've done some fairly complex things with sudo to provide access to
other accounts (non-root) for thousands of end users who needed to run a
few different programs as different userids. We controlled which options
were allow too - sudo has config options for that as well. By far, this
would be the easiest answer.
On 05/16/16 16:43, DJ-Pfulio wrote:
<blockquote type="cite">
Force the processes to run under a different userid that is locked down.
Users would use sudo to access that other account and launch the
program(s) with approved options only. Nothing else. That user account
could have access to create an LV for all temporary data, if you wanted
to go crazy. Just don't let their normal userids have access to the
temporary areas.
Are the programs developed in-house? Hard to stop the devs from making
debug stuff write wherever they want.
On 05/16/16 10:48, Jim Kinney wrote:
<blockquote type="cite">
I'm trying to envision a process that will have some funky permissions
in play and would appreciate ideas.
Data is sensitive and stored in encrypted partition. Only users in the
approved group can read in that folder.
They need to run that data through custom code that may do temporary
writes somewhere. That will need to be locked down and either encrypted
or overwritten after use (or both). This is the easy part.
I need to prevent that data from being written/copied anywhere else even
if they have write permission (home dir).
I run CentOS 7 systems so I have selinux. However, once this scales off
the individual research system to the cluster, I've disabled selinux on
the cluster for performance reasons. I can activate it if the encrypted
folders are mounted and limit runs to specific nodes if always running.
So I'm seeing (sort of. Not fully thought out yet) a rule that allows
data read with binaries of a particular type that can only write to
particular folders. Note that the final output of the data run is not
sensitive but intermediate data may be. To run a process requires
writing binary to specific folder. That folder forces all contents to be
special type that is subject to selinux rule.
Can't allow users to directly read the files in order to disallow 'cat
file > newfile' to disallowed folder.
Data files are (currently) video and output is ascii text so it's
possible to check file types on output before allowed to copy to new folder.
However, the input data files may be ascii for a different groups work.
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</blockquote>
</blockquote>
</pre></blockquote><div><span><pre>--
James P. Kinney III
Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain
http://heretothereideas.blogspot.com/
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