Get Screensaver Status for ALL Users - Windows

# SPDX-FileCopyrightText: 2010 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.96058");
  script_version("2025-03-06T05:38:27+0000");
  script_tag(name:"last_modification", value:"2025-03-06 05:38:27 +0000 (Thu, 06 Mar 2025)");
  script_tag(name:"creation_date", value:"2010-04-27 10:02:59 +0200 (Tue, 27 Apr 2010)");
  script_tag(name:"cvss_base", value:"0.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:N");
  script_tag(name:"qod_type", value:"registry");
  script_name("Get Screensaver Status for ALL Users - Windows");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2010 Greenbone AG");
  script_family("IT-Grundschutz");
  script_mandatory_keys("Compliance/Launch/GSHB", "Tools/Present/wmi");
  script_dependencies("smb_reg_service_pack.nasl", "GSHB/GSHB_WMI_OSInfo.nasl", "lsc_options.nasl");
  script_exclude_keys("win/lsc/disable_win_cmd_exec");

  script_tag(name:"summary", value:"The script detects if Screensaver is activated and secured.");

  exit(0);
}

include("wmi_user.inc");
include("smb_nt.inc");
include("powershell_func.inc");

if(is_win_cmd_exec_disabled())
  exit(0);

host    = get_host_ip();
usrname = kb_smb_login();
domain  = kb_smb_domain();
if (domain){
  usrname = domain + '\\' + usrname;
}
passwd = kb_smb_password();

OSVER = get_kb_item("WMI/WMI_OSVER");

if(!OSVER || "none" >< OSVER){
  set_kb_item(name:"WMI/Screensaver", value:"error");
  set_kb_item(name:"WMI/Screensaver/log", value:"No access to SMB host.\nFirewall is activated or there is not a Windows system.");
  exit(0);
}

handlereg = wmi_connect_reg(host:host, username:usrname, password:passwd);

if(!handlereg){
  set_kb_item(name:"WMI/Screensaver", value:"error");
  set_kb_item(name:"WMI/Screensaver/log", value:"wmi_connect: WMI Connect failed.");
  wmi_close(wmi_handle:handlereg);
  exit(0);
}

sysLst = powershell_wmi_user_sysaccount();
usrLst = powershell_wmi_user_useraccount();

Lst = sysLst + usrLst;

Lst = split(Lst, "\n", keep:0);
for(i=1; i<max_index(Lst); i++)
{
  if("Domain|Name|SID" >< Lst[i]){
    continue;
  }
  desc = split(Lst[i], sep:"|", keep:0);
  if(desc !=NULL)
  {
    SID = desc[2];

    if(SID == "S-1-5-18" || SID == "S-1-5-19" || SID == "S-1-5-20") continue;

    testval = wmi_reg_enum_value(key:SID + "\\Control Panel\\Desktop",
                                 hive:0x80000003,
                                 wmi_handle:handlereg);

    if(testval){

      screenkey = SID + "\\Control Panel\\Desktop";
      domscreenkey = SID + "\\Software\\Policies\\Microsoft\\Windows\\Control Panel\\Desktop";

      ScreenSaveActive = wmi_reg_get_sz(wmi_handle:handlereg, hive:0x80000003,
       key:screenkey, key_name:"ScreenSaveActive");

      ScreenSaverIsSecure = wmi_reg_get_sz(wmi_handle:handlereg, hive:0x80000003,
       key:screenkey, key_name:"ScreenSaverIsSecure");

      ScreenSaveTimeOut = wmi_reg_get_sz(wmi_handle:handlereg, hive:0x80000003,
       key:screenkey, key_name:"ScreenSaveTimeOut");

      DomScreenSaveActive = wmi_reg_get_sz(wmi_handle:handlereg, hive:0x80000003,
       key:domscreenkey, key_name:"ScreenSaveActive");

      DomScreenSaverIsSecure = wmi_reg_get_sz(wmi_handle:handlereg, hive:0x80000003,
       key:domscreenkey, key_name:"ScreenSaverIsSecure");

      DomScreenSaveTimeOut = wmi_reg_get_sz(wmi_handle:handlereg, hive:0x80000003,
       key:domscreenkey, key_name:"ScreenSaveTimeOut");

      if (!ScreenSaveActive) ScreenSaveActive = "none";
      if (!DomScreenSaveActive) DomScreenSaveActive = "none";
      if (!ScreenSaverIsSecure) ScreenSaverIsSecure = "none";
      if (!DomScreenSaverIsSecure) DomScreenSaverIsSecure = "none";
      if (!ScreenSaveTimeOut) ScreenSaveTimeOut = "none";
      if (!DomScreenSaveTimeOut) DomScreenSaveTimeOut = "none";

      value += desc[0] + "\" + desc[1] +
       ";ScreenSaveActive=" + ScreenSaveActive +
       ";ScreenSaverIsSecure=" + ScreenSaverIsSecure +
       ";ScreenSaveTimeOut=" + ScreenSaveTimeOut +
       ";DomScreenSaveActive=" + DomScreenSaveActive +
       ";DomScreenSaverIsSecure=" + DomScreenSaverIsSecure +
       ";DomScreenSaveTimeOut=" + DomScreenSaveTimeOut + '\n';

    }
  }
}

if(!value) value = "none";

set_kb_item(name:"WMI/Screensaver", value:value);


wmi_close(wmi_handle:handlereg);
exit(0);