flatnux-uploadlfi.txt
Posted on 20 April 2009
Author: girex Homepage: girex.altervista.org Date: 17/04/2009 CMS: flatnux-2009-03-27 site: flatnux.altervista.org Bugs: Multiple remote vulnerabilities Flatnux suffers of multiple local file inclusions: (output of my scanner) Line: 10 File: D:/xampp/htdocs/flat/flatnux/sections/00_News/admin.php require_once("sections/".sectionlocation($_FN['vmod'])."/functions.php"); Line: 6 File: D:/xampp/htdocs/flat/flatnux/sections/02_Flatforum/search.php include ("sections/$module/config.php"); Line: 8 File: D:/xampp/htdocs/flat/flatnux/sections/06_Download/section.php include ("sections/$_FNVMOD/config.php"); Line: 3 File: D:/xampp/htdocs/flat/flatnux/sections/08_Files/search.php include ("sections/$module/config.php"); Line: 30 File: D:/xampp/htdocs/flat/flatnux/sections/10_Login/section.php include ("sections/{$_FN['vmod']}/config.php"); Line: 14 File: D:/xampp/htdocs/flat/flatnux/sections/none_Control_Center/section.php require_once ("sections/{$_FN['vmod']}/cc_functions.php"); Line: 2 File: D:/xampp/htdocs/flat/flatnux/themes/tp_alpha/theme.php include ("themes/{$_FN['theme']}/config.php"); Line: 2 File: D:/xampp/htdocs/flat/flatnux/themes/tp_dhtml2/theme.php include ("themes/{$_FN['theme']}/config.php"); Line: 2 File: D:/xampp/htdocs/flat/flatnux/themes/tp_green/theme.php include ("themes/{$_FN['theme']}/config.php"); Now see... File: /include/xmldb.php - Lines: 433-447 if (isset ($_FILES[$key]['tmp_name']) && $_FILES[$key]['tmp_name'] != "") { if (eregi('.php', $_FILES["$key"]['name']) || eregi('.php3', $_FILES["$key"]['name']) || eregi('.php4', $_FILES["$key"]['name']) || eregi('.php5', $_FILES["$key"]['name'])) <== { touch("$path/$databasename/$tablename/$unirecid/$key/" . $_FILES["$key"]['name']); } else { if (!file_exists("$path/$databasename/$tablename/$unirecid")) mkdir("$path/$databasename/$tablename/$unirecid"); if (!file_exists("$path/$databasename/$tablename/$unirecid/$key")) mkdir("$path/$databasename/$tablename/$unirecid/$key"); move_uploaded_file(realpath($_FILES[$key]['tmp_name']), "$path/$databasename/$tablename/$unirecid/$key/" . $_FILES["$key"]['name']); <== As you can see the script checks for .php .php3/4/5 extensions but what about .phtml extension? Depending of web server configuration .phtml can be interpreted as php code. To upload a file you need a valid login. You can get the upload module at the URLs: - /path/index.php?mod=08_Files where 08 is the default number but it can be different (max 20 i think) or - /path/index.php?mod=none_Files Remember that you need aùto be authenticated. Now upload your shell with .phtml extension and retrieve its link. If the web server does not interprets .phtml files as php files you can upload a .txt file with malicious code (ex <? system($cmd);?>) And include it with one of local file inclusions reported before. So you can obtain a Remote Command Execution depending of php.ini configuration becouse lfi's works with: register_globals = On magic_quotes_gpc = Off Too see the php.ini configuration you can use this phpinfo() disclosure: - /path/sections/none_Control_Center/phpinfo.php or - /path/sections/10_Control_Center/phpinfo.php where 10 can be different number (max 20 i think)
