Peter Lesterhuis wrote:
ith SELinux in permissive mode clamd started without problem.
>>> > > > In the graphical configuration tool of SELinux I found
SELinux
>>> Service Protection; there I only had to check clamd.
>>> > > > Clamd is now also running in enforced mode (SELinux).
>>>
>> > > > >
>> > > Can you post the output of:
>> > >
>> > > # getsebool -a | grep clam
>> > >
>> > > I suspect all you've done is turn off SELinux protection of
clamd (by
>> > > setting the clamd_disable_trans boolean). If that's the case,
>> there is a
>> > > better way but it'll need more work.
>> > # getsebool -a | grep clam
>> > clamd_disable_trans --> on
>> > clamscan_disable_trans --> off
>> > freshclam_disable_trans --> off
>> > > As you can see I am afraid that is the case.
>> >> To fix it "properly" you'd need to put SELinux in permissive
mode, turn
>> off the clamd_disable_trans boolean and then find the "avc: denied"
>> messages mentioning clamd in your log files when you start and use the
>> service. By looking at those messages, we can figure out what's wrong
>> and hopefully fix it.
>> > I started clamd with SELinux in permissive mode and with >
clamd_disable_trans boolean turned off. In /var/log/messages there is
> this error:
> ...
> Jun 12 23:45:21 cello clamd[3053]: Daemon started.
> Jun 12 23:45:21 cello clamd[3053]: clamd daemon 0.88.2 (OS:
linux-gnu, > ARCH: i386, CPU: i386)
> Jun 12 23:45:21 cello clamd[3053]: Log file size limit disabled.
> Jun 12 23:45:21 cello clamd[3053]: Reading databases from
/var/lib/clamav
> Jun 12 23:45:22 cello clamd[3053]: Protecting against 59059 viruses.
> Jun 12 23:45:22 cello clamd[3054]: bind() error: Address already in use
This one might be normal; sshd generates a similar error message.
> In /var/log/audit/audit.log there are several "avc: denied" messages:
> > ...
Most of these should be fixed in the latest selinux-policy update:
# yum update selinux\* policycoreutils libsepol
This policy module should fix the others. Create files myclamd.fc and
myclamd.te in the /root/selinux.local you made last time, and run
"make" in that directory.
####### myclamd.fc (one long line) #######
/var/log/clamav/clamd.* --
gen_context(system_u:object_r:clamd_var_log_t,s0)
####### myclamd.te #######
policy_module(myclamd, 0.1.0)
require {
type clamd_t;
};
# Allow clamd to send syslog messages
# This is clamav 1.0.1
#logging_send_syslog_msg(clamd_t)
# term_dontaudit_use_generic_ptys(clamd_t) is in clamav 1.0.1
#term_dontaudit_use_generic_ptys(clamd_t)
kernel_read_kernel_sysctls(clamd_t)
Then load the new module:
# semodule -i myclamd
Check you have the required module versions
# semodule -l
amavis 1.0.4
clamav 1.0.1
myclamd 0.1.0
myfreshclam, 0.1.0
Fix /var/log/clamav file contexts:
# restorecon -rv /var/log/clamav
restorecon reset /var/log/clamav/clamd.log context
user_u:object_r:var_log_t->system_u:object_r:clamd_var_log_t
Then try restarting clamav and see if any more AVCs appear. If not,
try again in enforcing mode.
I updated selinux\* policycoreutils and libsepol. I created the files
myclamd.fc and myclamd.te and issued the "make"-command.
Loading the new module gives me this output:
selinux.local]# semodule -i myclamd
semodule: Could not read file 'myclamd':
Sorry, that should have been:
# semodule -i myclamd.pp
I wish I could be more helpfull, but this is way beyond my understanding
of SELinux (and clamav). So I simply follow your suggestions and report
what is happening.
Keep it up - some people would have given up by now :-)
Paul.
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