Microsoft Windows: MS Security Guide: Enable Structured Exception Handling Overwrite Protection

# SPDX-FileCopyrightText: 2018 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("1.3.6.1.4.1.25623.1.0.109306");
  script_version("2023-08-23T05:05:12+0000");
  script_tag(name:"last_modification", value:"2023-08-23 05:05:12 +0000 (Wed, 23 Aug 2023)");
  script_tag(name:"creation_date", value:"2018-06-15 11:45:02 +0200 (Fri, 15 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: MS Security Guide: Enable Structured Exception Handling Overwrite Protection");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Policy");
  script_dependencies("compliance_tests.nasl", "smb_reg_service_pack.nasl");
  script_mandatory_keys("Compliance/Launch");

  script_add_preference(name:"Value", type:"radio", value:"0;1", id:1);
  script_xref(name:"Policy", value:"CIS Microsoft Windows 10 Enterprise (Release 22H2) Benchmark v2.0.0: 18.4.5 (L1) Ensure 'Enable Structured Exception Handling Overwrite Protection (SEHOP)' is set to 'Enabled'");
  script_xref(name:"Policy", value:"CIS Microsoft Windows 10 Enterprise (Release 2004) Benchmark v1.9.1: 18.3.4 (L1) Ensure 'Enable Structured Exception Handling Overwrite Protection (SEHOP)' is set to 'Enabled'");
  script_xref(name:"Policy", value:"CIS Microsoft Windows Server 2019 RTM (Release 1809) Benchmark v1.1.0: 18.3.4 (L1) Ensure 'Enable Structured Exception Handling Overwrite Protection (SEHOP)' is set to 'Enabled'");
  script_xref(name:"Policy", value:"CIS Controls Version 7: 8.3 Enable Operating System Anti-Exploitation Features/ Deploy Anti-Exploit Technologies");
  script_xref(name:"Policy", value:"CIS Controls Version 7: 9.3 Perform Regular Automated Port Scans");


  script_xref(name:"URL", value:"https://www.microsoft.com/en-us/download/confirmation.aspx?id=25250");

  script_tag(name:"summary", value:"If this setting is enabled, SEHOP is enforced.

If this setting is disabled or not configured, SEHOP is not enforced for 32-bit processes.

(C) Microsoft Corporation 2015.");

  exit(0);
}

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

target_os = "Microsoft Windows 7 or later";
win_min_ver = "6.1";
title = "Enable Structured Exception Handling Overwrite Protection (SEHOP)";
solution = "Set following UI path accordingly: Computer Configuration/Administrative Templates/MS Security Guide" + title;
type = "HKLM";
key = "SYSTEM\CurrentControlSet\Control\Session Manager\kernel";
item = "DisableExceptionChainValidation";
reg_path = type + "\" + key + "!" + item;
test_type = "RegKey";
default = script_get_preference("Value");

if(!policy_verify_win_ver(min_ver:win_min_ver))
  results = policy_report_wrong_os(target_os:target_os);
else
  results = policy_match_exact_reg_dword(key:key, item:item, type:type, default:default);

value = results["value"];
comment = results["comment"];
compliant = results["compliant"];

policy_reporting(result:value, default:default, compliant:compliant, fixtext:solution,
  type:test_type, test:reg_path, info:comment);
policy_set_kbs(type:test_type, cmd:reg_path, default:default, solution:solution, title:title,
  value:value, compliant:compliant);

exit(0);