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www.waraxe.us Forum Index -> Php -> PHP backdoor
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PHP backdoor
PostPosted: Wed May 13, 2009 10:59 pm Reply with quote
access101
Regular user
Regular user
Joined: Apr 29, 2009
Posts: 21




is there a PHP trojan/backdoor?

im trying to upload a php file as a image to a forum

here are the details
-------------------------------------------------------------------
Many forums/sites, give the possiblilty of an avatar or picture to upload. there are only jpg. the null byte exploit makes if possilbe to php files to forum.

--------------------------
%00
--------------------------
%00 is the hexdecimal value for null. paste this in your broswer

http://www.google.nl/search?hl=nl&q=ho% 00i


If youre in the search bar look, you see that there is 'ho' is sought. the i is not shown because 00% repersents.

what if we %00 once a file set?

example: C:\exploits\c99.php%00.jpg


the operating system of the website will upload c99.php now because 00%, but the server sees the jpg extension, and thinks that it is a image.
results: an uploaded php file only jpg is allowed




------------------------------------------------------------------------
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PostPosted: Thu May 14, 2009 1:42 am Reply with quote
access101
Regular user
Regular user
Joined: Apr 29, 2009
Posts: 21




alright i got shell

visit for the shell
http://pentestmonkey.net/tools/php-reverse-shell/

just need to find host that will run this
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PostPosted: Fri May 15, 2009 2:35 am Reply with quote
access101
Regular user
Regular user
Joined: Apr 29, 2009
Posts: 21




you need netcat
http://netcat.sourceforge.net/download.php
they have a windows version to

than in terminal or if you got verison for windows same i think

nc -v -n -l -p 1234
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PHP backdoor
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