RE: [squid-users] SELINUX issue(confined>unconfined)

Yes i am using a compiled version. I have used this command chcon -t unconfined_exec_t /usr/sbin/squid and its working now. Is this a security issue?
 
regards,
 
Bilal
 
 
 
 
 

----------------------------------------
> Date: Tue, 18 May 2010 14:26:06 +0200
> From: tiery.denys_at_gmail.com
> To: squid-users_at_squid-cache.org
> Subject: Re: [squid-users] SELINUX issue(confined>unconfined)
>
> Hi,
>
> ps -Z => squid_t and getenforce => enforcing
> squid is started with selinux
>
> Redhat/centos platform:
> If squid is installed with yum, squid will be started with a squid_t
> selinux context.
>
> If you compile your squid and installed it, you will have to change
> squid files contexts manually.
>
> As i see you have squid_kerb_plugin, you should have compile you squid
> to support kerberos, no?
>
> ---
>
> For your problem:
>
> try to check selinux log:
> audit2allow -al
> or cat /var/log/audit/audit.log | audit2allow
>
> You can also try to restore selinux context for all squid files:
> restorecon -R /etc/squid
> restorecon -R /var/log/squid
>
> etc...
>
> or touch /.autorelabel and reboot
>
>
> Tiery
>
> On Tue, May 18, 2010 at 9:47 AM, GIGO . wrote:
>>
>> Dear All,
>>
>> Your guidance is required. Please help.
>>
>> It looks that squid process run by default as a confined process whether its a compiled version or a version that come with the linux distro. It means that the squid software is SELINUX aware.Am i right?
>>
>> [root_at_squidLhr ~]# ps -eZ | grep squid
>> system_u:system_r:squid_t 3173 ? 00:00:00 squid
>> system_u:system_r:squid_t 3175 ? 00:00:00 squid
>> system_u:system_r:squid_t 3177 ? 00:00:00 squid
>> system_u:system_r:squid_t 3179 ? 00:00:00 squid
>> system_u:system_r:squid_t 3222 ? 00:00:00 unlinkd
>> system_u:system_r:squid_t 3223 ? 00:00:00 unlinkd
>>
>>
>> it was successful before i changed the selinux to enforcing.Now i even cannot start squid process that access the parent at localhost(3128) manually even. The other process starts normally if i do manually.
>>
>> When running as an unconfined process by the following command the problem had resolved
>>
>> chcon -t unconfined_exec_t /usr/sbin/squid
>>
>> However it doesnot feel appropriate to me. Please guide me on this.
>>
>>
>>
>> I am starting squid with the following init script if it has something to do with the problem:
>>
>> #!/bin/sh
>> #
>> #my script
>> case "$1" in
>> start)
>> /usr/sbin/squid -D -sYC -f /etc/squid/squidcache.conf
>> /usr/sbin/squid -D -sYC -f /etc/squid/squid.conf
>> #The below line is to automatically start apache with system startup
>> /usr/sbin/httpd -k start
>> #KRB5_KTNAME=/etc/squid/HTTP.keytab
>> #export KRB5_KTNAME
>> #KRB5RCACHETYPE=none
>> #export KRB5RCACHETYPE
>> ;;
>> stop)
>>
>> /usr/sbin/squid -k shutdown -f /etc/squid3/squidcache.conf
>> echo "Shutting down squid secondary process"
>> /usr/sbin/squid -k shutdown -f /etc/squid3/squid.conf
>> echo "Shutting down squid main process"
>> # The below line is to automatically stop apache at system shutdown
>> /usr/sbin/httpd -k stop
>> ;;
>> esac
>>
>>
>> Thanking you & regards,
>>
>> Bilal
>>
>>
>> ----------------------------------------
>>> From: gigoz_at_msn.com
>>> To: squid-users_at_squid-cache.org
>>> Date: Tue, 18 May 2010 06:02:35 +0000
>>> Subject: [squid-users] SELINUX issue
>>>
>>>
>>> Hi all,
>>>
>>> When i change SELINUX from permissive mode to Enforcing mode. My multiple instance setup fail to start. Please guide how to overcome this.
>>>
>>> -----------------------Excerpts from cache.log-----------------
>>>
>>> 2010/05/18 10:31:51| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:51| Store rebuilding is 7.91% complete
>>> 2010/05/18 10:31:52| Done reading /var/spool/squid swaplog (51794 entries)
>>> 2010/05/18 10:31:52| Finished rebuilding storage from disk.
>>> 2010/05/18 10:31:52| 51794 Entries scanned
>>> 2010/05/18 10:31:52| 0 Invalid entries.
>>> 2010/05/18 10:31:52| 0 With invalid flags.
>>> 2010/05/18 10:31:52| 51794 Objects loaded.
>>> 2010/05/18 10:31:52| 0 Objects expired.
>>> 2010/05/18 10:31:52| 0 Objects cancelled.
>>> 2010/05/18 10:31:52| 0 Duplicate URLs purged.
>>> 2010/05/18 10:31:52| 0 Swapfile clashes avoided.
>>> 2010/05/18 10:31:52| Took 1.13 seconds (45641.00 objects/sec).
>>> 2010/05/18 10:31:52| Beginning Validation Procedure
>>> 2010/05/18 10:31:52| Completed Validation Procedure
>>> 2010/05/18 10:31:52| Validated 103614 Entries
>>> 2010/05/18 10:31:52| store_swap_size = 913364
>>> 2010/05/18 10:31:52| storeLateRelease: released 0 objects
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| Detected DEAD Parent: 127.0.0.1
>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>> 2010/05/18 10:31:52| Failed to select source for 'http://1.channel19.facebook.com/p'
>>> 2010/05/18 10:31:52| always_direct = 0
>>> 2010/05/18 10:31:52| never_direct = 1
>>> 2010/05/18 10:31:52| timedout = 0
>>> 2010/05/18 10:31:57| Failed to select source for 'http://0.channel19.facebook.cm
>>>
>>> --------------------------------------------------------------------------------------------
>>>
>>>
>>> regards,
>>>
>>> Bilal
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Received on Tue May 18 2010 - 12:34:54 MDT