ftpd is denied access to a dir

Wed Oct 3 23:58:12 UTC 2007

I have Fedora 7, using gnome. I installed pure-ftpd (version 1.0.21-12) 
on my personal computer (for my own use), along with the selinux augment.

When I run the server as a xinetd service, and attempt a unix-style log
in (with gftp, on my LAN), I get this from gftp:

Connected to 10.0.0.50:21
220 (text)
220 (text)
USER mpk
331 user mpk OK. Password required.
PASS xxxx
530 user authentication failed
Disconnected from 10.0.0.50.

On 10.0.0.50, this is in the SElinux troubleshooter:

>> ALERT 1

Summary
     SELinux is preventing the ftp daemon from writing files outside the
home directory (pure-ftpd).

Detailed Description
     SELinux has denied the ftp daemon write access to directories
outside the home directory (pure-ftpd). Someone has logged in via your
ftp daemon and is trying to create or write a file. If you only setup
ftp to allow anonymous ftp, this could signal a intrusion attempt.

Allowing Access
     If you do not want SELinux preventing ftp from writing files
anywhere on the system you need to turn on the allow_ftpd_full_access
boolean:
"setsebool -P allow_ftpd_full_access=1"

     The following command will allow this access:
     setsebool -P allow_ftpd_full_access=1

Additional Information

Source Context                user_u:system_r:ftpd_t
Target Context                user_u:object_r:var_run_t
Target Objects                pure-ftpd [ dir ]
Affected RPM Packages         pure-ftpd-1.0.21-12.fc7 [application]
Policy RPM                    selinux-policy-2.6.4-8.fc7
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   plugins.allow_ftpd_full_access
Host Name                     d500.localdomain
Platform                      Linux d500.localdomain 2.6.21-1.3228.fc7
#1 SMP  Tue Jun 12 15:37:31 EDT 2007 i686 i686
Alert Count                   6
First Seen                    Sat 25 Aug 2007 09:54:58 AM EDT
Last Seen                     Sat 25 Aug 2007 10:30:03 AM EDT
Local ID                      a8f17786-d787-4b38-86a2-ce3309391690
Line Numbers

Raw Audit Messages

avc: denied { create } for comm="pure-ftpd" egid=0 euid=0
exe="/usr/sbin/pure-
ftpd" exit=-13 fsgid=0 fsuid=0 gid=0 items=0 name="pure-ftpd" pid=28641
scontext=user_u:system_r:ftpd_t:s0 sgid=0 subj=user_u:system_r:ftpd_t:s0
suid=0 tclass=dir tcontext=user_u:object_r:var_run_t:s0 tty=(none) uid=0

**

I issued that command, and it apparently worked (no complaint displayed).

>> ALERT 2

Summary
     SELinux is preventing /usr/sbin/pure-ftpd (ftpd_t) "search" to net
(proc_net_t).

Detailed Description
     SELinux denied access requested by /usr/sbin/pure-ftpd. It is not
expected that this access is required by /usr/sbin/pure-ftpd and this
access may signal an intrusion attempt. It is also possible that the
specific version or configuration of the application is causing it to
require additional access.
Allowing Access
     Sometimes labeling problems can cause SELinux denials. You could
try to restore the default system file context for net, restorecon -v
net If this does not work, there is currently no automatic way to allow
this access. Instead, you can generate a local policy module to allow
this access - see
http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385 Or you can
disable SELinux protection altogether. Disabling SELinux protection is
not recommended. Please file a
http://bugzilla.redhat.com/bugzilla/enter_bug.cgi
against this package.

Additional Information
Source Context                user_u:system_r:ftpd_t
Target Context                system_u:object_r:proc_net_t
Target Objects                net [ dir ]
Affected RPM Packages         pure-ftpd-1.0.21-12.fc7 [application]
Policy RPM                    selinux-policy-2.6.4-8.fc7
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   plugins.catchall_file
Host Name                     d500.localdomain
Platform                      Linux d500.localdomain 2.6.21-1.3228.fc7
#1 SMP  Tue Jun 12 15:37:31 EDT 2007 i686 i686
Alert Count                   12
First Seen                    Thu 30 Aug 2007 09:26:07 PM EDT
Last Seen                     Thu 06 Sep 2007 09:30:33 PM EDT
Local ID                      8958c16e-27eb-4d3f-ad5c-787c1a960769
Line Numbers

Raw Audit Messages
avc: denied { search } for comm="pure-ftpd" dev=proc egid=0 euid=0
exe="/usr/sbin/pure-ftpd" exit=-13 fsgid=0 fsuid=0 gid=0 items=0 name="net"
pid=19097 scontext=user_u:system_r:ftpd_t:s0 sgid=0
subj=user_u:system_r:ftpd_t:s0 suid=0 tclass=dir
tcontext=system_u:object_r:proc_net_t:s0 tty=(none) uid=0

**

I tried to allow access; I saw that there is a directory 'net' in proc:
[root at d500 proc]# restorecon -v net
lstat(net) failed: Permission denied

Now what? Did I do this wrong, or do I need to create a 'local policy
module'?

Btw - if I run pure-ftpd as a standalone, I can login fine (but I don't
want to run it that way).