Bug 162349 – Policy prevents NFS exporting CDs

Bug 162349 - Policy prevents NFS exporting CDs

Summary:	Policy prevents NFS exporting CDs

Status:	CLOSED CURRENTRELEASE

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	selinux-policy-targeted (Show other bugs)
Sub Component:
Version:	4
Hardware:	i386 Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Daniel Walsh
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Reported:	2005-07-02 19:15 EDT by Pete Chown
Modified:	2007-11-30 17:11 EST (History)
CC List:	0 users

See Also:
Fixed In Version:	1.25.4-10.1
Doc Type:	Bug Fix
Doc Text:
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Environment:
Last Closed:	2005-09-15 11:58:28 EDT
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Description Pete Chown 2005-07-02 19:15:08 EDT

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.7.8) Gecko/20050524 Fedora/1.0.4-4 Firefox/1.0.4

Description of problem:
When the targeted policy is loaded, the NFS daemon is denied access to iso9660_t, preventing it exporting mounted CDs or CD images.  There also doesn't seem to be a way of disabling SELinux protection for NFS, whereas there is a way for all the other daemons.

Version-Release number of selected component (if applicable):
selinux-policy-targeted-1.23.18-17

How reproducible:
Always

Steps to Reproduce:
1. Mount a CD.
2. Configure NFS to export the directory where the CD is mounted.
3. Enable targeted policy.
4. Mount the directory exported at (2) above from another machine.
  

Actual Results:  AVC message in the audit log.

Expected Results:  The directory should have been mounted.

Additional info:

Comment 1 Daniel Walsh 2005-07-03 11:22:59 EDT

Fixed in selinux-policy-targeted-1.24-3

Comment 2 Pete Chown 2005-07-11 16:04:35 EDT

I've just updated to selinux-policy-targeted-1.24-3 and retested this.  I
haven't yet tried to export a mounted physical CD, but exporting mounted CD
images still doesn't work.  I managed to get this working by adding

allow nfsd_t iso9660_t:dir getattr;

to my local policy.  Hope this helps, let me know if you need more information
about my setup.

Comment 3 Daniel Walsh 2005-07-11 16:19:11 EDT

What is the current settings of your booleans?

getsebool -a | grep nfs

Comment 4 Pete Chown 2005-07-11 16:31:18 EDT

Daniel,

The NFS booleans are:

nfs_export_all_ro --> active
nfs_export_all_rw --> active
nfsd_disable_trans --> inactive
use_nfs_home_dirs --> inactive

Thanks
Pete

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