flatnuke3-cm.txt

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____ __________ __ ____ __   
/_ | ____ |__\_____ \ _____/ |_ /_ |/ |_   
| |/ \ | | _(__ <_/ ___\ __\ ______ | \ __\  
| | | \ | |/ \ \___| | /_____/ | || |   
|___|___| /\__| /______ /\___ >__| |___||__|   
\/\______| \/ \/   
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Http://www.inj3ct-it.org Staff[at]inj3ct-it[dot]org   
  
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Flatnuke3 Remote Cookie Manipoulation / Privilege Escalation  
  
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#By KiNgOfThEwOrLd  
  
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PoC:  
  
When an user log in, flatnuke set him a cookie value like this:   
myforum=nomeuser. If we try to change it, flatnuke will ask us to log in again.   
The code is:  
  
$req = $_SERVER["REQUEST_URI"];  
if (strstr($req, "myforum="))  
die(_NONPUOI);  
  
So, we can bypass this filter, using nullbyte and login as admin. For example,   
Replace:   
  
myforum=yourusername   
  
with:   
  
myforum%00=adminusername  
  
PHP Execution PoC:  
  
I saw that in download module, if we set to "1" the fneditmode, we can make   
directory. So, we can write a description for the directory, and this   
description will be saved in /Download/[Dir_Name]/description.it.php . Yes, we   
can insert php code in the description and it will be execute! Nice, dontcha? :  
P  
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Original here: http://www.inj3ct-it.org/exploit/flatnuke3-cm.txt  
  
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