WooYun.org

function initupload($module, $catid,$args, $userid, $groupid = '8', $isadmin = '0',$userid_flash='0'){
        $grouplist = getcache('grouplist','member');
        if($isadmin==0 && !$grouplist[$groupid]['allowattachment']) return false;
        extract(getswfinit($args));
        $siteid = param::get_cookie('siteid');
        $site_setting = get_site_setting($siteid);
        $file_size_limit = $site_setting['upload_maxsize'];
        $sess_id = SYS_TIME;
        $admin_url = pc_base::load_config('system','admin_url');
        $upload_path = empty($admin_url) ? APP_PATH : 'http://'.$admin_url.'/';
        $swf_auth_key = md5(pc_base::load_config('system','auth_key').$sess_id);
        $init =  'var swfu = \'\';
        $(document).ready(function(){
        swfu = new SWFUpload({
            flash_url:"'.JS_PATH.'swfupload/swfupload.swf?"+Math.random(),
            upload_url:"'.$upload_path.'index.php?m=attachment&c=attachments&a=swfupload&dosubmit=1",
            file_post_name : "Filedata",
            post_params:{"SWFUPLOADSESSID":"'.$sess_id.'","module":"'.$module.'","catid":"'.$_GET['catid'].'","userid":"'.$userid.'","siteid":"'.$siteid.'","dosubmit":"1","thumb_width":"'.$thumb_width.'","thumb_height":"'.$thumb_height.'","watermark_enable":"'.$watermark_enable.'","filetype_post":"'.$file_types_post.'","swf_auth_key":"'.$swf_auth_key.'","isadmin":"'.$isadmin.'","groupid":"'.$groupid.'","userid_flash":"'.$userid_flash.'"},
            file_size_limit:"'.$file_size_limit.'",
            file_types:"'.$file_types.'",
            file_types_description:"All Files",
            file_upload_limit:"'.$file_upload_limit.'",
            custom_settings : {progressTarget : "fsUploadProgress",cancelButtonId : "btnCancel"},
     
            button_image_url: "",
            button_width: 75,
            button_height: 28,
            button_placeholder_id: "buttonPlaceHolder",
            button_text_style: "",
            button_text_top_padding: 3,
            button_text_left_padding: 12,
            button_window_mode: SWFUpload.WINDOW_MODE.TRANSPARENT,
            button_cursor: SWFUpload.CURSOR.HAND,
            file_dialog_start_handler : fileDialogStart,
            file_queued_handler : fileQueued,
            file_queue_error_handler:fileQueueError,
            file_dialog_complete_handler:fileDialogComplete,
            upload_progress_handler:uploadProgress,
            upload_error_handler:uploadError,
            upload_success_handler:uploadSuccess,
            upload_complete_handler:uploadComplete
            });
        })';
        return $init;
    }

<?php echo initupload($_GET['module'],$_GET['catid'],$args,$this->userid,$this->groupid,$this->isadmin,$userid_flash)?>

public function download() {
        $a_k = trim($_GET['a_k']);
        if(empty($_SERVER['HTTP_USER_AGENT'])){
            $pc_auth_key = md5(pc_base::load_config('system','auth_key').'down');
        }else{
            $pc_auth_key = md5(pc_base::load_config('system','auth_key').$_SERVER['HTTP_USER_AGENT']);//修改UA为$sess_id
        }
        $a_k = sys_auth($a_k, 'DECODE', $pc_auth_key);//$pc_auth_key为前面获取到的$swf_auth_key
        if(empty($a_k)) showmessage(L('illegal_parameters'));
        unset($i,$m,$f,$t,$ip);
        parse_str($a_k);        
        if(isset($i)) $downid = intval($i);
        if(!isset($m)) showmessage(L('illegal_parameters'));
        if(!isset($modelid)) showmessage(L('illegal_parameters'));
        if(empty($f)) showmessage(L('url_invalid'));
        if(!$i || $m<0) showmessage(L('illegal_parameters'));
        if(!isset($t)) showmessage(L('illegal_parameters'));
        if(!isset($ip)) showmessage(L('illegal_parameters'));
        $starttime = intval($t);
        if(preg_match('/(php|phtml|php3|php4|jsp|dll|asp|cer|asa|shtml|shtm|aspx|asax|cgi|fcgi|pl)(\.|$)/i',$f) || strpos($f, ":\\")!==FALSE || strpos($f,'..')!==FALSE) showmessage(L('url_error'));
        $fileurl = trim($f);
        if(!$downid || empty($fileurl) || !preg_match("/[0-9]{10}/", $starttime) || !preg_match("/[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}/", $ip) || $ip != ip()) showmessage(L('illegal_parameters'));    
        $endtime = SYS_TIME - $starttime;
        if($endtime > 3600) showmessage(L('url_invalid'));
        if($m) $fileurl = trim($s).trim($fileurl);//对$s没有过滤，可以将路径拆成两部分来绕过检查
        //远程文件
        if(strpos($fileurl, ':/') && (strpos($fileurl, pc_base::load_config('system','upload_url')) === false)) { 
            header("Location: $fileurl");
        } else {
            if($d == 0) {
                header("Location: ".$fileurl);
            } else {
                $fileurl = str_replace(array(pc_base::load_config('system','upload_url'),'/'), array(pc_base::load_config('system','upload_path'),DIRECTORY_SEPARATOR), $fileurl);
                $filename = basename($fileurl);
                //处理中文文件
                if(preg_match("/^([\s\S]*?)([\x81-\xfe][\x40-\xfe])([\s\S]*?)/", $fileurl)) {
                    $filename = str_replace(array("%5C", "%2F", "%3A"), array("\\", "/", ":"), urlencode($fileurl));
                    $filename = urldecode(basename($filename));
                }
                $ext = fileext($filename);
                $filename = date('Ymd_his').random(3).'.'.$ext;
                file_down($fileurl, $filename);//readfile读取文件输出
            }
        }
    }