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On 07/10/2014 08:17 PM, Gene Czarcinski
wrote:
Generally I am a "belt and suspenders" type of guy with respect to
security so for a webserver (apache(httpd), lighttpd, or nginx) I
want to run the server chrooted AS WELL AS have SELinux enforcing
in effect. I have been running SELinux enabled and enforcing from
the beginning so it is not a question of using SELinux.
Well, I am not doing to well and really cannot get things to
work. Without chroot but with SELinux enforcing, I can get
lighttpd to serve static files and CPI created info (specifically
to support git clone and gitweb). With chroot and SELInux
enforcing I can get static files served but not CGI stuff
...
I get lots of "CGI failed: Permission denied
cgi-bin/git-http-backend"
What AVC msgs are you getting?
Re-test and run
# ausearch -m avc -ts recent
A
bunch of years ago when I was using the bind package for dns,
there was a change in Fedora/RHEL to de-emphasize use of chroot
and instead depend on SELinux to protect things. This change was
not so much advertised and just done.
I am wondering if something similar has happened for the
webserver. There is some (very limited) doc for apache (httpd)
and a lot of rules in selinux-policy-targetted for "httpd" and
these rules seem to apply to both httpd (apache) and lighttpd. If
I am reading the tea leaves correctly SELinux seems to be
providing a lot of protection.
So, do I need chroot??? Is just using SELinux a "good enough"
solution? I am not looking for a perfect solution but one which
"good engineering practice" says should be "good enough." I hope
it is but would sure like some "experts" to agree as well as maybe
pointing to some substantiating documentation.
Side comment: If SELinux is attempting to provide the same
functionality to both httpd and lighttpd, it would be nice if the
documentation at least mentioned lighttpd.
Gene
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