2:37 p.m.
H Dominick,
thanks for the quick reply again, and for getting me over the hump.
I went with the changes to the .te file, and am now getting the process
started
in the right domain.
For completeness sake, here the following info:
[proxyuser@lime cz]$ sudo sesearch -SCT --allow -s unconfined_t -t
CZtp_exec_t
<snip>
Found 1 semantic te rules:
type_transition unconfined_t CZtp_exec_t : process CZtp_t;
The process now shows up with:
[proxyuser@lime target]$ ps -efZ | grep CZtp
unconfined_u:unconfined_r:CZtp_t:s0 501 6355 5903 0 15:26 pts/1
00:00:00 /bin/sh ./CZtp
On 7/23/2011 9:10 PM, Dominick Grift wrote:
No, but you could add the following to the .te file:
gen_require(` type unconfined_t; role unconfined_r; ')
CZtp_role(unconfined_r, unconfined_t)
.. Instead of what i suggested in my previous reply. Both methods should
make the domain transition happen.
On Sat, 2011-07-23 at 21:03 +0200, Michael Atighetchi wrote:
> One more point. Here is the .if file that sepolgen generated (see below
> between {{{ and }}}).
> Should I manually add the gen_requie and domatrans_pattern lines you
> suggested to that policy ?
>
> Michael
>
> {{{
>
> ##<summary>policy for CZtp</summary>
>
>
> ########################################
> ##<summary>
> ## Execute a domain transition to run CZtp.
> ##</summary>
> ##<param name="domain">
> ##<summary>
> ## Domain allowed access.
> ##</summary>
> ##</param>
> #
> interface(`CZtp_domtrans',`
> gen_require(`
> type CZtp_t, CZtp_exec_t;
> ')
>
> domtrans_pattern($1, CZtp_exec_t, CZtp_t)
> ')
>
>
> ########################################
> ##<summary>
> ## Execute CZtp in the CZtp domain, and
> ## allow the specified role the CZtp domain.
> ##</summary>
> ##<param name="domain">
> ##<summary>
> ## Domain allowed access
> ##</summary>
> ##</param>
> ##<param name="role">
> ##<summary>
> ## The role to be allowed the CZtp domain.
> ##</summary>
> ##</param>
> #
> interface(`CZtp_run',`
> gen_require(`
> type CZtp_t;
> ')
>
> CZtp_domtrans($1)
> role $2 types CZtp_t;
> ')
>
> ########################################
> ##<summary>
> ## Role access for CZtp
> ##</summary>
> ##<param name="role">
> ##<summary>
> ## Role allowed access
> ##</summary>
> ##</param>
> ##<param name="domain">
> ##<summary>
> ## User domain for the role
> ##</summary>
> ##</param>
> #
> interface(`CZtp_role',`
> gen_require(`
> type CZtp_t;
> ')
>
> role $1 types CZtp_t;
>
> CZtp_domtrans($2)
>
> ps_process_pattern($2, CZtp_t)
> allow $2 CZtp_t:process signal;
> ')
>
> }}}
>
>
>
> On 7/23/2011 8:43 PM, Dominick Grift wrote:
>> You are probably missing a domain type transition.
>>
>> running the following command you can see if unconfined_t has a domain
>> type transition defined when it runs executable files with type
>> CZtp_exec_t:
>>
>> sesearch -SCT --allow -s unconfined_t -t CZtp_exec_t
>>
>> if none is specified then you must specify that your calling domain
>> unconfined_t, domain type transitions to CZtp_t when a file with type
>> CZtp_exec_t is executed.
>>
>> You will also need to allow the unconfined_r role the CZtp_t domain.
>>
>> After that you may want to allow unconfined_t to interact with CZtp_t in
>> other ways as well but at least by then the type transition should
>> happen.
>>
>> The policy:
>>
>> gen_require(` type unconfined_t, CZtp_exec_t, CZtp_t; role unconfined_r;
>> ')
>> domtrans_pattern(unconfined_t, CZtp_exec_t, CZtp_t)
>> role unconfined_r types CZtp_t;
>>
>>
>> On Sat, 2011-07-23 at 20:32 +0200, Michael Atighetchi wrote:
>>> Hi,
>>>
>>> I'm trying to create a new policy for a constrained process (started by
>>> an unconstrainted user) and am stuck trying to get the process started
>>> in the right context.
>>>
>>> Here are the steps I followed:
>>>
>>> 0. confirm SELinux status
>>> [proxyuser@lime ~]$ sestatus
>>> SELinux status: enabled
>>> SELinuxfs mount: /selinux
>>> Current mode: permissive
>>> Mode from config file: permissive
>>> Policy version: 24
>>> Policy from config file: targeted
>>>
>>> [proxyuser@lime ~]$ cat /etc/redhat-release
>>> Fedora release 14 (Laughlin)
>>>
>>> [proxyuser@lime cz]$ id -Z
>>> unconfined_u:unconfined_r:unconfined_t:s0
>>>
>>> 1. create policy via
>>>
>>> sepolgen -t 3 /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp
>>>
>>> Note that CZtp is a shell script which in turn calls the JVM.
>>>
>>> [proxyuser@lime cz]$ sudo ./CZtp.sh
>>> Building and Loading Policy
>>> + make -f /usr/share/selinux/devel/Makefile
>>> make: Nothing to be done for `all'.
>>> + /usr/sbin/semodule -i CZtp.pp
>>> + /sbin/restorecon -F -R -v
>>> /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp
>>> /sbin/restorecon reset
>>> /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp context
>>> system_u:system_r:CZtp_exec_t:s0->system_u:object_r:CZtp_exec_t:s0
>>>
>>> 2. Verify that the the CZtp file is labeled properly:
>>> [proxyuser@lime cz]$ ls -lZ
>>> /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp
>>> -rwxr-xr-x. proxyuser proxyuser system_u:object_r:CZtp_exec_t:s0
>>> /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp
>>>
>>> 3. start process
>>> [proxyuser@lime cz]$ cd /home/proxyuser/trunk/aps-base/crumple-zone/target/
>>> [proxyuser@lime target]$ ./CZtp
>>>
>>> 4. Verify process context
>>> [proxyuser@lime ~]$ ps -efZ | grep -v grep | grep CZtp
>>> unconfined_u:unconfined_r:unconfined_t:s0 501 5789 5734 0 14:22 pts/0
>>> 00:00:00 /bin/sh ./CZtp
>>>
>>>
>>> Note that the process shows up as unconfined_t, although it was labeled
>>> with CZtp_exec_t.
>>>
>>> What am I missing?
>>>
>>>
>>>
>>> 4. check process context
>>>
>
--
Michael Atighetchi
Senior Scientist
Raytheon BBN Technologies
617-873-1679
matighet(a)bbn.com