Microsoft Windows: Network security: Allow Local System to use computer identity for NTLM

2018-06-12T00:00:00
ID OPENVAS:1361412562310109229
Type openvas
Reporter Copyright (c) 2018 Greenbone Networks GmbH
Modified 2018-09-12T00:00:00

Description

This test checks the setting for policy

                                        
                                            ##############################################################################
# OpenVAS Vulnerability Test
# $Id: win_nsec_local_sys_comp_ntlm.nasl 11344 2018-09-12 06:57:52Z emoss $
#
# Check value for Network security: Allow Local System to use computer identity for NTLM
#
# Authors:
# Emanuel Moss <emanuel.moss@greenbone.net>
#
# Copyright:
# Copyright (c) 2018 Greenbone Networks GmbH, http://www.greenbone.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.109229");
  script_version("$Revision: 11344 $");
  script_tag(name:"last_modification", value:"$Date: 2018-09-12 08:57:52 +0200 (Wed, 12 Sep 2018) $");
  script_tag(name:"creation_date", value:"2018-06-12 10:12:28 +0200 (Tue, 12 Jun 2018)");
  script_tag(name:"cvss_base", value:"0.0");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:H/Au:S/C:N/I:N/A:N");
  script_tag(name:"qod", value:"97");
  script_name('Microsoft Windows: Network security: Allow Local System to use computer identity for NTLM');
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (c) 2018 Greenbone Networks GmbH");
  script_family("Policy");
  script_dependencies("smb_reg_service_pack.nasl");
  script_add_preference(name:"Value", type:"radio", value:"1;0");
  script_mandatory_keys("Compliance/Launch");
  script_tag(name:"summary", value:"This test checks the setting for policy
'Network security: Allow Local System to use computer identity for NTLM' on
Windows hosts (at least Windows 7).

The setting ensures that services using Local System that use negotiate when
reverting to NTLM authentication will use the computer identity vs. anonymously.");
  exit(0);
}

include("smb_nt.inc");
include("policy_functions.inc");

if(!get_kb_item("SMB/WindowsVersion")){
  policy_logging(text:'Host is no Microsoft Windows System or it is not possible
to query the registry.');
  exit(0);
}

if(get_kb_item("SMB/WindowsVersion") < "6.1"){
  policy_logging(text:'Host is not at least a Microsoft Windows 7 system.
Older versions of Windows are not supported any more. Please update the
Operating System.');
  exit(0);
}

title = 'Network security: Allow Local System to use computer identity for NTLM';
fixtext = 'Set following UI path accordingly:
Computer Configuration/Windows Settings/Security Settings/Local Policies/Security Options/' + title;
type = 'HKLM';
key = 'System\\CurrentControlSet\\Control\\Lsa';
item = 'UseMachineId';
default = script_get_preference('Value');
value = registry_get_dword(key:key, item:item, type:type);
if(value == ''){
  value = '0';
}

if(int(value) == int(default)){
  compliant = 'yes';
}else{
  compliant = 'no';
}

policy_logging(text:'"' + title + '" is set to: ' + value);
policy_add_oid();
policy_set_dval(dval:default);
policy_fixtext(fixtext:fixtext);
policy_control_name(title:title);
policy_set_kb(val:value);
policy_set_compliance(compliant:compliant);
policy_control_name(title:title);

exit(0);