Re: server side filter plugin problem

On Thu, Jun 27, 2013 at 12:09 AM, Bu Xiaobing <[email protected]> wrote:
> On 2013-6-25 7:14, Paul Lesniewski wrote:
>>> I think the problem with setgroups(0, NULL): Operation not permitted has
>>> been resolved.
>>
>> If you don't say *how* -- explain carefully what you changed, what
>> your current settings are, then you leave us to guess.  This is
>> frustrating and you are less likely to receive any help this way.
>>
>>> At the first time I set
>>> 'SUID_LOCATION'  => array('VALUE' =>
>>> '/var/www/html/webmail/plugins/server_settings_backend/suid_backend/squirrelmail_server_settings_suid_backend'),
>>>
>>> I find in the /var/www/html/webmail/plugins/server_settings_backend also has
>>> a squirrelmail_server_settings_suid_backend, and the file permission is
>>> -rwsr-xr-x.
>>>
>>> So I change the SUID_LOCATION value to
>>> /var/www/html/webmail/plugins/server_settings_backend/squirrelmail_server_settings_suid_backend
>>
>> The only examples I can find point to the server_settings_backend
>> directory.  The copy of the suid_wrapper in the suid_backend directory
>> shouldn't be used in your configuration.  (I believe this is your
>> oversight, unless you can point out where there was a misleading
>> example.)
>>
>>> But get another error "Remote file name cannot contain "/"" in the
>>> /var/log/httpd/error_log.
>>
>> This is good in general.  If you really need directory traversal
>> (why?), read the docs on how to compile the suid wrapper.  And once
>> again, READ THE DOCS **BEFORE** you ask for help.
>>
>>> And if I set "$ssf_debug_server_settings_backend = 1" in the
>>> server_side_filters/config.php, and after I click "Options->Message Filters"
>>> on the web browser, the web page only display the following message:
>>>
>>> Unable to retrieve file from command
>>> "/var/www/html/webmail/plugins/server_settings_backend/squirrelmail_server_settings_suid_backend
>>> 'localhost' 'buxiaobing' 'get_file' '/home/buxiaobing/.mailfiter'
>>> '/var/local/squirrelmail/attach/xo4HqZ6WpSq6iUazfx1TLAmw3SEg6p9D'"
>>>
>>> Can't understand why will it retrieve the
>>> /var/local/squirrelmail/attach/xo4HqZ6WpSq6iUazfx1TLAmw3SEg6p9D file and
>>> this file is not exist.
>>>
>>>
>>> Bu Xiaobing
>>
>>
>>
>
> Thanks for your help. I read the server_settings_backend/docs/SUID_BACKEND_ERRORS
> and find the problems and it works now!

Thanks for reading the docs.  I'd just caution you again *against*
allowing directory traversal.  There is no reason you should need that
and it is less secure.

-- 
Paul Lesniewski
SquirrelMail Team
Please support Open Source Software by donating to SquirrelMail!
http://squirrelmail.org/donate_paul_lesniewski.php

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