Microsoft Windows 10: Access Credential Manager as a trusted caller

##############################################################################
# OpenVAS Vulnerability Test
# $Id: win10_access_credential_manager_trusted_caller.nasl 11532 2018-09-21 19:07:30Z cfischer $
#
# Check value for Access Credential Manager as a trusted caller (WMI)
#
# Authors:
# Emanuel Moss <[email protected]>
#
# 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("1.3.6.1.4.1.25623.1.0.109112");
  script_version("$Revision: 11532 $");
  script_tag(name:"last_modification", value:"$Date: 2018-09-21 21:07:30 +0200 (Fri, 21 Sep 2018) $");
  script_tag(name:"creation_date", value:"2018-04-30 09:16:41 +0200 (Mon, 30 Apr 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 10: Access Credential Manager as a trusted caller');
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (c) 2018 Greenbone Networks GmbH");
  script_family("Policy");
  script_add_preference(name:"Value", type:"entry", value:"None");
  script_dependencies("gb_wmi_access.nasl", "smb_reg_service_pack.nasl");
  script_mandatory_keys("Compliance/Launch");
  script_require_keys("WMI/access_successful");
  script_tag(name:"summary", value:"The Access Credential Manager as a trusted
caller policy setting is used by Credential Manager during backup and restore.
No accounts should have this privilege because it is assigned only to the
Winlogon service. Saved credentials of users may be compromised if this
privilege is given to other entities.");
  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);
}

WindowsName = get_kb_item("SMB/WindowsName");
if('windows 10' >!< tolower(WindowsName)){
  policy_logging(text:'Host is not a Microsoft Windows 10 System.');
  exit(0);
}

title = 'Access Credential Manager as a trusted caller';
select = 'AccountList';
keyname = 'SeTrustedCredManAccessPrivilege';
fixtext = 'Set following UI path accordingly:
Computer Configuration/Windows Settings/Security Settings/Local Policies/User Rights Assignment/' + title;
default = script_get_preference('Value');

value = rsop_userprivilegeright(select:select,keyname:keyname);
if( value == ''){
  value = 'None';
}

if(tolower(chomp(value)) == tolower(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);

exit(0);