vb.org Archive - Possible security issue with a mod, hack attempt?

vb.org Archive (https://vborg.vbsupport.ru/index.php)

- Forum and Server Management (https://vborg.vbsupport.ru/forumdisplay.php?f=232)

- - Possible security issue with a mod, hack attempt? (https://vborg.vbsupport.ru/showthread.php?t=281773)

viper357

04-19-2012 06:42 AM

Possible security issue with a mod, hack attempt?

Hi everyone

I got some strange database errors this morning which seemed to emanate from the vbimagehosting mod. I'm not sure if it is anything to be concerned about as I've got no idea what it all means, but maybe someone has found a security flaw in the mod? These are a few of the errors I was receiving, take note of the end of the url's.

Code:

http://*****.com/vbimghost.php?do=userlist&pp=20&page=/etc/passwd

Code:

http://*****.com/vbimghost.php?do=userlist&pp=20&page=/../../../../../../../../../../etc/passwd

Code:

http://*****.com/vbimghost.php?do=userlist&pp=20&page=/etc/passwd%00

Code:

http://*****.com/vbimghost.php?do=userlist&pp=20&page=/proc/self/environ%00

Should I be worried? To me it looks like someone is trying to access passwords or something?

Thanks.

kh99	04-19-2012 12:12 PM

Yes, it looks like someone was trying to use a security hole to read files from your system. But trying doesn't mean they were successful (or that the "hole" they were trying actually exists in your forum). You said you saw database errors? What did they look like? (BTW, I tried it once myself so that latest error was just me).

The latest code for that mod looks like it treats the 'page' parameter correctly, but maybe older versions (of the mod or of vb) had a problem.

viper357

04-19-2012 02:33 PM

Hi, thanks for the reply, this is one of the database errors, I got about 10, some with different URL's that they were obviously trying.

Code:

Database error in vBulletin 3.8.5:



Invalid SQL:

select user.username,  img.userid,count(*) imgcnt FROM vbimghost as img LEFT JOIN user as user ON  img.userid = user.userid where imgprivate =0 group by user.username LIMIT  -20,20;



MySQL Error   : You have an error in your SQL syntax; check the  manual that corresponds to your MySQL server version for the right syntax to use  near '-20,20' at line 1

Error Number  : 1064

Request Date  : Thursday,  April 19th 2012 @ 08:16:39 AM

Error Date    : Thursday, April 19th 2012 @  08:16:39 AM

Script        : http://www.marineaquariumsa.com/vbim.../../etc/passwd

Referrer       : 

IP Address    : removed

Username      :  Unregistered

Classname     : vB_Database

MySQL Version :

ForceHSS

04-19-2012 03:41 PM

ban the ips trying to hack and update to 3.8.7 Patch Level 2

kh99	04-19-2012 04:56 PM

There's a slight issue in that mod, in that if you pass a string as the 'page' parameter it becomes page 0 and generates a starting LIMIT in the query of -20 which is invalid (first page is 1 so 0 is invalid). But that doesn't create a security issue, and even if it did allow you to modify the sql, putting a file name there wouldn't read the file. So I don't think you have anything to worry about.

BTW, the ip address in the above error is mine, so please everybody don't start banning me. :)

viper357

04-19-2012 04:56 PM

Quote:

ban the ips trying to hack

Yip, I've done that in the admin panel, thanks.

Quote:

and update to 3.8.7 Patch Level 2

Yeah I need to do that one day, it's just I've got so many manually edited templates, lol.

--------------- Added [DATE]1334858362[/DATE] at [TIME]1334858362[/TIME] ---------------

Quote:

Originally Posted by kh99 (Post 2321646)

Ok, thanks for the help. Sorry about the IP address :p, I've removed it from my post.

All times are GMT. The time now is 02:43 PM.

X vBulletin 3.8.12 by vBS Debug Information
Page Generation 0.01020 seconds Memory Usage 1,731KB Queries Executed 10 (?)
More Information
Template Usage: (1)ad_footer_end (1)ad_footer_start (1)ad_header_end (1)ad_header_logo (1)ad_navbar_below (5)bbcode_code_printable (3)bbcode_quote_printable (1)footer (1)gobutton (1)header (1)headinclude (6)option (1)post_thanks_navbar_search (1)printthread (6)printthreadbit (1)spacer_close (1)spacer_open Phrase Groups Available: global postbit showthread	Included Files: ./printthread.php ./global.php ./includes/init.php ./includes/class_core.php ./includes/config.php ./includes/functions.php ./includes/class_hook.php ./includes/modsystem_functions.php ./includes/class_bbcode_alt.php ./includes/class_bbcode.php ./includes/functions_bigthree.php Hooks Called: init_startup init_startup_session_setup_start init_startup_session_setup_complete cache_permissions fetch_threadinfo_query fetch_threadinfo fetch_foruminfo style_fetch cache_templates global_start parse_templates global_setup_complete printthread_start bbcode_fetch_tags bbcode_create bbcode_parse_start bbcode_parse_complete_precache bbcode_parse_complete printthread_post printthread_complete
Messages: