【PHP代码审计】 那些年我们一起挖掘SQL注入 - 8.全局防护盲点的总结下篇

index.php里:
include TIPASK_ROOT . ‘/model/tipask.class.php‘;
$tipask = new tipask();
$tipask->run();
... ...
跟进到/model/tipask.class.php里:
function init_request() {
... ...
        $this->get = taddslashes($this->get, 1);
        $this->post = taddslashes(array_merge($_GET, $_POST));
        checkattack($this->post, ‘post‘);
        checkattack($this->get, ‘get‘);
        unset($_POST);
    }

<?php
function onupload() {
    //上传配置
    $config = array(
        "uploadPath" => "data/attach/", //保存路径
        "fileType" => array(".rar", ".doc", ".docx", ".zip", ".pdf", ".txt", ".swf", ".wmv", "xsl"), //文件允许格式
        "fileSize" => 10 //文件大小限制，单位MB
    );

    //文件上传状态,当成功时返回SUCCESS，其余值将直接返回对应字符窜
    $state = "SUCCESS";
    $clientFile = $_FILES["upfile"];
    if (!isset($clientFile)) {
        echo "{‘state‘:‘文件大小超出服务器配置！‘,‘url‘:‘null‘,‘fileType‘:‘null‘}"; //请修改php.ini中的upload_max_filesize和post_max_size
        exit;
    }

    //格式验证
    $current_type = strtolower(strrchr($clientFile["name"], ‘.‘));
    if (!in_array($current_type, $config[‘fileType‘])) {
        $state = "不支持的文件类型！";
    }
    //大小验证
    $file_size = 1024 * 1024 * $config[‘fileSize‘];
    if ($clientFile["size"] > $file_size) {
        $state = "文件大小超出限制！";
    }
    //保存文件
    if ($state == "SUCCESS") {
        $targetfile = $config[‘uploadPath‘] . gmdate(‘ym‘, $this->time) . ‘/‘ . random(8) . strrchr($clientFile["name"], ‘.‘);
        $result = $_ENV[‘attach‘]->movetmpfile($clientFile, $targetfile);
        if (!$result) {
            $state = "文件保存失败！";
        } else {
            //这里将上传的文件名带入数据库查询
            $_ENV[‘attach‘]->add($clientFile["name"], $current_type, $clientFile["size"], $targetfile, 0);
        }
    }
    //向浏览器返回数据json数据
    echo ‘{"state":"‘ . $state . ‘","url":"‘ . $targetfile . ‘","fileType":"‘ . $current_type . ‘","original":"‘ . $clientFile["name"] . ‘"}‘;
}

<?php
function add($filename,$ftype,$fsize,$location,$isimage=1) {
    $uid=$this->base->user[‘uid‘];
    $this->db->query("INSERT INTO ".DB_TABLEPRE."attach(time,filename,filetype,filesize,location,isimage,uid)  VALUES ({$this->base->time},‘$filename‘,‘$ftype‘,‘$fsize‘,‘$location‘,$isimage,$uid)");
    return $this->db->insert_id();
}

<?php
$a=222333;
@extract($_POST);
print_r($a);

<?php
$a=22333;
foreach(array(‘_COOKIE‘,‘_POST‘,‘_GET‘) as $_request){
    foreach($$_request as $_key=>$_value){
        $$_key = addslashes($_value);
    }
}
echo $a;