Flatnuke 3 Remote Cookie Manipoulation - Privilege Escalation
2007-10-23 00:00:00---------------------------------------------------------------
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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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#
Fixes
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