Re: http AVC

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On Thursday 02 December 2010 18:10:22 Dominick Grift wrote:

> On 12/02/2010 06:47 PM, Daniel J Walsh wrote:

> > On 12/02/2010 12:44 PM, Tony Molloy wrote:

> >> On Thursday 02 December 2010 17:37:54 m.roth@xxxxxxxxx wrote:

> >>> Tony Molloy wrote:

> >>>> On Thursday 02 December 2010 15:56:59 m.roth@xxxxxxxxx wrote:

> >>>>> Daniel J Walsh wrote:

> >>>>>> On 12/02/2010 09:35 AM, Tony Molloy wrote:

> >>>>>>> Hi,

> >>>>>>>

> >>>>>>> I'm running http on a fully updated Centos 5 system.

> >>>>>>>

> >>>>>>> httpd-2.2.3-43.el5.centos.3.x86_64

> >>>>>>> selinux-policy-2.4.6-279.el5_5.2.noarch

> >>>>>>> selinux-policy-targeted-2.4.6-279.el5_5.2.noarch

> >>>>>>>

> >>>>>>> I'm trying to run a cgi script from a user directory.

> >>>>>

> >>>>> <MVNCH>

> >>>>>

> >>>>>> Do you have httpd_suexec_disable_trans turned on?

> >>>>>

> >>>>> Actually, what bothers me is trying to run a .cgi from a user's

> >>>>> directory. Can't you create a directory ->under the apache

> >>>

> >>> <Directory><- that the

> >>>

> >>>>> users can put scripts in for testing? (I assume that once they're

> >>>>> good, they go into the real production location for .cgi.)

> >>>>

> >>>> Not so easily done ;-)

> >>>>

> >>>> This is a University environment with several hundred faculty/students

> >>>> wanting to use this server to run/check assignments. So they have ftp

> >>>

> >>> accounts

> >>>

> >>>> where they can upload any scripts to their public_html directory and

> >>>> run

> >>>

> >>> them

> >>>

> >>>> from there.

> >>>

> >>> I figured it was something like that. What I was thinking was

> >>>

> >>> /var/www/html/public_cgi/<students' directories>

> >>>

> >>> which would put them in a *legitimate* place for apache to be happy

> >>> with, and which selinux would be happy with.

> >>>

> >>> You *might* need to add them to a group named something like pubcgi,

> >>> and make the above group acceptable to selinux and apache.

> >>>

> >>> mark

> >>

> >> Interesting idea. I could give it a try next semester.

>

> Not sure if suexec would work if you set it up that way

>

> I've ~/public_html/cgi-bin

> ~/(httpd_user_content_t/(httpd_user_script_exec_t) and works just dandy

> with suexec.

>

I'm not clear what you are saying here.

My SELinux contexts

-------------------

cd /var/pub/ftp

user directory

drwxr-xr-x healyp ftpgrp root:object_r:public_content_rw_t healyp

cd healyp

drwxr-xr-x healyp ftpgrp root:object_r:public_content_rw_t public_html

^^^^^^

cd public_html

drwxr-xr-x healyp ftpgrp root:object_r:httpd_sys_script_exec_t cgi-bin

^^^

cd cgi-bin

-rwxr-xr-x healyp ftpgrp root:object_r:httpd_sys_script_exec_t survey.cgi

^^^

Are you suggesting that ^^^ should be user instead of sys. Would that make a difference.

Thanks,

Tony

> >> Thanks,

> >>

> >> Tony

> >

> > It should not be necessary. public_html labeled correctly will work.

> > THe problem you are seeing is that this boolean was set causing suexec

> > to not work.

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