開啟網站

繞過上傳限制

檔案型別被限制

修改MIME，成功繞過

使用冰蠍連線

原始碼審計

$is_upload = false;
$msg = null;
if (isset($_POST['submit'])) {
    if (file_exists(UPLOAD_PATH)) {
        if (($_FILES['upload_file']['type'] == 'image/jpeg') || ($_FILES['upload_file']['type'] == 'image/png') || ($_FILES['upload_file']['type'] == 'image/gif')) { //MIME 做了限制
            $temp_file = $_FILES['upload_file']['tmp_name'];
            $img_path = UPLOAD_PATH . '/' . $_FILES['upload_file']['name']            
            if (move_uploaded_file($temp_file, $img_path)) {
                $is_upload = true;
            } else {
                $msg = '上傳出錯！';
            }
        } else {
            $msg = '檔案型別不正確，請重新上傳！';
        }
    } else {
        $msg = UPLOAD_PATH.'資料夾不存在,請手工建立！';
    }
}
 

本文來自部落格園，作者：oldliutou，轉載請註明原文連結：https://www.cnblogs.com/oldliutou/p/15702277.html