Hi Dominick,
thanks for the quick reply. Here is what I'm getting when I run the command you suggested:
[proxyuser@lime ~]$ sesearch -SCT --allow -s unconfined_t -t CZtp_exec_t Found 10 semantic av rules: allow files_unconfined_type file_type : filesystem { mount remount unmount getattr relabelfrom relabelto transition associate quotamod quotaget } ; allow files_unconfined_type file_type : file { ioctl read write create getattr setattr lock relabelfrom relabelto append unlink link rename execute swapon quotaon mounton execute_no_trans entrypoint open audit_access } ; allow files_unconfined_type file_type : dir { ioctl read write create getattr setattr lock relabelfrom relabelto append unlink link rename execute swapon quotaon mounton add_name remove_name reparent search rmdir open audit_access execmod } ; allow files_unconfined_type file_type : lnk_file { ioctl read write create getattr setattr lock relabelfrom relabelto append unlink link rename execute swapon quotaon mounton open audit_access execmod } ; allow files_unconfined_type file_type : chr_file { ioctl read write create getattr setattr lock relabelfrom relabelto append unlink link rename execute swapon quotaon mounton execute_no_trans entrypoint open audit_access } ; allow files_unconfined_type file_type : blk_file { ioctl read write create getattr setattr lock relabelfrom relabelto append unlink link rename execute swapon quotaon mounton open audit_access execmod } ; allow files_unconfined_type file_type : sock_file { ioctl read write create getattr setattr lock relabelfrom relabelto append unlink link rename execute swapon quotaon mounton open audit_access execmod } ; allow files_unconfined_type file_type : fifo_file { ioctl read write create getattr setattr lock relabelfrom relabelto append unlink link rename execute swapon quotaon mounton open audit_access execmod } ; allow unconfined_usertype application_exec_type : file { ioctl read getattr lock execute execute_no_trans open } ; ET allow files_unconfined_type file_type : file execmod ; [ allow_execmod ]
I have a hard time telling whether the output qualifies as speciying a domain type transition or not - do you know whether it does? If not, what should I do with the policy you suggested (in terms of commands to get it installed) ?
Thanks for the help Michael
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:
- 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
- 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
- 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
- start process
[proxyuser@lime cz]$ cd /home/proxyuser/trunk/aps-base/crumple-zone/target/ [proxyuser@lime target]$ ./CZtp
- 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?
- check process context