[CentOS] permission problems with avamis and Centos 6.3

Mon Jan 28 19:39:47 UTC 2013
Robert Moskowitz <rgm at htt-consult.com>

On 01/28/2013 01:15 PM, Daniel J Walsh wrote:
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> On 01/28/2013 11:29 AM, Robert Moskowitz wrote:
>> On 01/24/2013 02:48 PM, Daniel J Walsh wrote:
>>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
>>>
>>> On 01/24/2013 01:15 PM, Robert Moskowitz wrote:
>>>> Thank you for your suggestion, but it did not fix the permissions
>>>> problem.
>>>>
>>>> On 01/24/2013 10:13 AM, Rob wrote:
>>>>> usermod -a -G amavis clam
>>>> How is this different from:
>>>>
>>>> gpasswd -a clam amavis
>>>>
>>>> And I am still getting the permissions error.
>>>>
>>>>> service clamd restart
>>>>>
>>>>> be happy
>>>>>
>>>>> On 24.01.2013, at 04:16, Robert Moskowitz <rgm at htt-consult.com>
>>>>> wrote:
>>>>>
>>>>>> I am trying to follow:
>>>>>>
>>>>>> http://wiki.centos.org/HowTos/Amavisd
>>>>>>
>>>>>> Which seems to really be written for Centos 5, with just some
>>>>>> selinux references for Centos 6.  There are real problems here for
>>>>>> Centos 6 with the userids section.
>>>>>>
>>>>>> It gives the following command and result:
>>>>>>
>>>>>> cat /etc/passwd | grep "amavis\|clamav" clamav:x:101:102:Clam Anti
>>>>>> Virus Checker:/var/clamav:/sbin/nologin amavis:x:102:103:Amavis
>>>>>> email scan user:/var/amavis:/bin/sh
>>>>>>
>>>>>> But my Centos 6.3 has:
>>>>>>
>>>>>> clam:x:494:490:Clam Anti Virus
>>>>>> Checker:/var/lib/clamav:/sbin/nologin
>>>>>> amavis:x:493:489::/var/spool/amavisd:/sbin/nologin
>>>>>>
>>>>>> Note the difference in userid clam instead of clamav.  So this
>>>>>> causes problems with the group recommendation:
>>>>>>
>>>>>> In addition, the clamav user should automatically have been added
>>>>>> to the amavis group:
>>>>>>
>>>>>> # groups clamav clamav : clamav amavis
>>>>>>
>>>>>> If not, you can manually add clamav to the amavis group:
>>>>>>
>>>>>> gpasswd -a clamav amavis
>>>>>>
>>>>>>
>>>>>> so I did:
>>>>>>
>>>>>> gpasswd -a clam amavis
>>>>>>
>>>>>>
>>>>>> So far, it seems just changing what userid is now used by
>>>>>> clamav...
>>>>>>
>>>>>> But in testing for spam I see the following in /var/log/maillog
>>>>>>
>>>>>> Jan 23 15:56:17 test1 amavis[25669]: (25669-01) (!)run_av
>>>>>> (ClamAV-clamd) FAILED - unexpected ,
>>>>>> output="/var/spool/amavisd/tmp/amavis-20130123T155617-25669/parts:
>>>>>> lstat() failed: Permission denied. ERROR\n"
>>>>>>
>>>>>> I checked this directory tree and all along the tree the
>>>>>> permissions are to amavis:amavis
>>>>>>
>>>>>> So where is my permission problem?
>>>>>>
>>>>>>
>>>>>> _______________________________________________ CentOS mailing
>>>>>> list CentOS at centos.org
>>>>>> http://lists.centos.org/mailman/listinfo/centos
>>>>> _______________________________________________ CentOS mailing list
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>>>>>
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>>>>
>>> Can you attach the AVC messages from audit log.
>>>
>>> ausearch -m avc -ts recent
>> Back home and booted up test system (thus no questions about clamav
>> state):
>>
>> ---- time->Mon Jan 28 11:18:26 2013 type=SYSCALL
>> msg=audit(1359389906.446:25): arch=40000003 syscall=5 success=yes exit=3
>> a0=92de9d8 a1=98800 a2=92de9d8 a3=92ba620 items=0 ppid=2211 pid=3045
>> auid=4294967295 uid=493 gid=489 euid=493 suid=493 fsuid=493 egid=489
>> sgid=489 fsgid=489 tty=(none) ses=4294967295 comm="clamscan"
>> exe="/usr/bin/clamscan" subj=system_u:system_r:clamscan_t:s0 key=(null)
>> type=AVC msg=audit(1359389906.446:25): avc:  denied  { read } for pid=3045
>> comm="clamscan" name="parts" dev=dm-0 ino=2624185
>> scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=dir ---- time->Mon Jan
>> 28 11:18:26 2013 type=SYSCALL msg=audit(1359389906.490:26): arch=40000003
>> syscall=39 success=yes exit=0 a0=92e64f8 a1=1c0 a2=a36cd8 a3=92e64f8
>> items=0 ppid=2211 pid=3045 auid=4294967295 uid=493 gid=489 euid=493
>> suid=493 fsuid=493 egid=489 sgid=489 fsgid=489 tty=(none) ses=4294967295
>> comm="clamscan" exe="/usr/bin/clamscan"
>> subj=system_u:system_r:clamscan_t:s0 key=(null) type=AVC
>> msg=audit(1359389906.490:26): avc:  denied  { create } for pid=3045
>> comm="clamscan" name="clamav-add5fee27e737080ac3907505396eca9"
>> scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=dir type=AVC
>> msg=audit(1359389906.490:26): avc:  denied  { add_name } for  pid=3045
>> comm="clamscan" name="clamav-add5fee27e737080ac3907505396eca9"
>> scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=dir type=AVC
>> msg=audit(1359389906.490:26): avc:  denied  { write } for pid=3045
>> comm="clamscan" name="tmp" dev=dm-0 ino=2624119
>> scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=dir ---- time->Mon Jan
>> 28 11:18:26 2013 type=SYSCALL msg=audit(1359389906.528:27): arch=40000003
>> syscall=5 success=yes exit=5 a0=92f1810 a1=2c2 a2=1c0 a3=bfdb5d2c items=0
>> ppid=2211 pid=3045 auid=4294967295 uid=493 gid=489 euid=493 suid=493
>> fsuid=493 egid=489 sgid=489 fsgid=489 tty=(none) ses=4294967295
>> comm="clamscan" exe="/usr/bin/clamscan"
>> subj=system_u:system_r:clamscan_t:s0 key=(null) type=AVC
>> msg=audit(1359389906.528:27): avc:  denied  { write } for pid=3045
>> comm="clamscan" name="clamav-308541af5e7a69c500ba0757a9644b91" dev=dm-0
>> ino=2753728 scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=file type=AVC
>> msg=audit(1359389906.528:27): avc:  denied  { create } for pid=3045
>> comm="clamscan" name="clamav-308541af5e7a69c500ba0757a9644b91"
>> scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=file ---- time->Mon Jan
>> 28 11:18:26 2013 type=SYSCALL msg=audit(1359389906.529:28): arch=40000003
>> syscall=15 success=yes exit=0 a0=92e64f8 a1=1c0 a2=a36cd8 a3=92e64f8
>> items=0 ppid=2211 pid=3045 auid=4294967295 uid=493 gid=489 euid=493
>> suid=493 fsuid=493 egid=489 sgid=489 fsgid=489 tty=(none) ses=4294967295
>> comm="clamscan" exe="/usr/bin/clamscan"
>> subj=system_u:system_r:clamscan_t:s0 key=(null) type=AVC
>> msg=audit(1359389906.529:28): avc:  denied  { setattr } for  pid=3045
>> comm="clamscan" name="clamav-add5fee27e737080ac3907505396eca9" dev=dm-0
>> ino=2753586 scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=dir ---- time->Mon Jan
>> 28 11:18:26 2013 type=SYSCALL msg=audit(1359389906.529:29): arch=40000003
>> syscall=40 success=no exit=-39 a0=92e64f8 a1=5106a4d2 a2=a36cd8 a3=92fee08
>> items=0 ppid=2211 pid=3045 auid=4294967295 uid=493 gid=489 euid=493
>> suid=493 fsuid=493 egid=489 sgid=489 fsgid=489 tty=(none) ses=4294967295
>> comm="clamscan" exe="/usr/bin/clamscan"
>> subj=system_u:system_r:clamscan_t:s0 key=(null) type=AVC
>> msg=audit(1359389906.529:29): avc:  denied  { rmdir } for pid=3045
>> comm="clamscan" name="clamav-add5fee27e737080ac3907505396eca9" dev=dm-0
>> ino=2753586 scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=dir type=AVC
>> msg=audit(1359389906.529:29): avc:  denied  { remove_name } for pid=3045
>> comm="clamscan" name="clamav-add5fee27e737080ac3907505396eca9" dev=dm-0
>> ino=2753586 scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=dir ---- time->Mon Jan
>> 28 11:18:26 2013 type=SYSCALL msg=audit(1359389906.529:30): arch=40000003
>> syscall=10 success=yes exit=0 a0=92f1910 a1=5106a4d2 a2=a36cd8 a3=92fee08
>> items=0 ppid=2211 pid=3045 auid=4294967295 uid=493 gid=489 euid=493
>> suid=493 fsuid=493 egid=489 sgid=489 fsgid=489 tty=(none) ses=4294967295
>> comm="clamscan" exe="/usr/bin/clamscan"
>> subj=system_u:system_r:clamscan_t:s0 key=(null) type=AVC
>> msg=audit(1359389906.529:30): avc:  denied  { unlink } for pid=3045
>> comm="clamscan" name="clamav-fcdca25df759de4e1da6dab82a8439a5" dev=dm-0
>> ino=2753729 scontext=system_u:system_r:clamscan_t:s0
>> tcontext=system_u:object_r:amavis_spool_t:s0 tclass=file
>>
>> Hope this helps!
>>
>>
> Try policy on people.redhat.com/dwalsh/SELinux/RHEL6

This is a little too cryptic for me.  I went to this url and since my 
system is i386 architecture, I went to the i686 directory.  There I find 
a number of RPMs and a number that start with policy.  I assume I can 
add this to my yum.repo over whatever I normally get for Centos, but 
what do I install or update?