Denied for com='ps' name='stat' {open} {read} {search}

[Dominick Grift]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 12/28/2010 09:06 PM, Frank Licea wrote:
> I just realised that the server is using a Ruby Enterprise edition
> installation. Which means that
> the ruby installation was downloaded as a .tar file and installed using an
> install script to the path /opt/ruby-enterprise-1.8.7-2010.02/
> 
> Thus everything in my $RUBY_HOME/bin is labelled system_u:object_r:bin_t:s0

you could try labelling "ApplicationPoolServerExecutable"
passenger_exec_t but to be honest i do not think this will be enough ( i
dont think the policy supports the enterprise edition) This may also
explain the /proc issue. Who know what other "features" the enterprise
edition supports.

So i guess you find yourself in a bit of a sticky situation here.
You could write policy for your enterprise edition yourself. After all
Selinux is a framework that allows you to do so, but you will have to
know a bit about the matter to be able to implement it, just like one
needs to know a bit about netfilter and iptables to open or forward some
network port.

I want to help you implement a policy but it isnt easy for me either as
i havent much experience with ruby on rails and its files.

Can you enclose a list with all the file locations included with you
passenger enterprise package?

> This includes $RUBY_HOME/bin/passenger. That explains why httpd is not
> running in the passenger domain.
> 
> Should I attempt to relabel these files myself?
> 
> This still doesn't explain the /proc access.
> 
> I've attempted to do look up the name of the process ID in the AVC denial
> messages but that process doesn't seem to show up using a `ps -ef` or
> looking for in in htop. It must be exiting quickly.
> 
> 
> On Tue, Dec 28, 2010 at 12:45 PM, Dominick Grift <domg472 at gmail.com> wrote:
> 
> On 12/28/2010 08:34 PM, Frank Licea wrote:
>>>> Daniel:
>>>>
>>>> I'm using Fedora 14.
>>>>
>>>> To answer Dominik's questions:
>>>>
>>>> 1) Why is passenger running in the httpd domain?
>>>>    I don't know. I've only followed the passenger installation
> instructions
>>>> at http://mifo.sk/posts/passenger-selinux-for-fedora/ minus step 5 since
>>>> Fedora 14 is supposed to have passenger policies installed? Should httpd
> be
>>>> in a special passenger domain?
> 
> I think fedora 14 has a special passenger policy installed but it looks
> like its not working on your system (note looks) since it seems to still
> run in the httpd_t domain.
> 
>>>> 2) is passenger running some webapp that for some reason needs to read
> the
>>>> state file in /proc  of some process that runs in the unconfined_t
> domain?
>>>>   No I don't think so. At least I haven't written any code where I use
>>>> anything in /proc.
>>>>   I suppose it is possible that a GEM library may be trying to.
> 
> Why would it? can you reproduce this issue. Does it only happen if you
> restart httpd manually? I guess it does..
> 
>>>> 3) does this issue cause any loss of functionality in enforcing mode
>>>>     I haven't checked yet. I will let you know soon.
>>>>
> 
> See if it works when ignoring this.
> 
>>>> 4. are you sure passenger and/or the passenger webapp is configured
>>>> correctly?
>>>>     I have as far as following the instructions in the blog post above. I
>>>> wonder if there
>>>>     is any relabelling I have to do?
> 
> I think this issue happens when the httpd server gets restarted manually
> (service httpd restart/stop/start etc) not sure though.
> 
> can you ls -alZ /path/to/passenger executable file?

> It should be labelled type: passenger_exec_t
> 
> httpd should domain transition to the passenger_t domain when it runs
> the passenger executable file (files with type passenger_exec_t)
> 
> seem that doesnt happen but even if it did, passenger still wouldnt be
> able to read unconfined_t state files in /proc ( not sure why it would
> need to either)
> 
> 
>>>>
>>>> 2010/12/28 Daniel J Walsh <dwalsh at redhat.com>
>>>>
>>>> On 12/26/2010 05:25 PM, Jorge Fábregas wrote:
>>>>>>> On Sunday, December 26, 2010 05:25:22 pm Dominick Grift wrote:
>>>>>>>>  is trying to read the state files in /proc for some unconfined_t
>>>> process
>>>>>>>
>>>>>>> Never thought of /proc.  That explains why I found it weird to see a
> file
>>>>>>> labeled as unconfined_t.
>>>>>>>
>>>>>>> Frank: disregard my previous suggetion >:)
>>>>>>>
>>>>>>> --
>>>>>>> Jorge
>>>>>>> --
>>>>>>> selinux mailing list
>>>>>>> selinux at lists.fedoraproject.org
>>>>>>> https://admin.fedoraproject.org/mailman/listinfo/selinux
>>>> What OS/Version are you seeing this in?
- --
selinux mailing list
selinux at lists.fedoraproject.org
https://admin.fedoraproject.org/mailman/listinfo/selinux
>>

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.16 (GNU/Linux)
Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/

iEYEARECAAYFAk0aRU0ACgkQMlxVo39jgT970wCgxvVa9Eb5FgQeyrDdVFqwnyx4
O8sAn1TZ0yMpADfsiCNMMPn1bH4Oe4U7
=86xe
-----END PGP SIGNATURE-----