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' ||...
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 $s; } Discuz!7.0-7.2 临时补丁： 在if($operation == 'uc' && is_writeable('./config.inc.php') && $isfounder) {下添加： foreach($settingsnew['uc'] as $key => $value){ $settingsnew['uc'][$key]=str_replace(')','',$value); }
