Microsoft Malware Protection Engine DoS Vulnerability (Apr 2023)

# SPDX-FileCopyrightText: 2023 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("1.3.6.1.4.1.25623.1.0.826960");
  script_version("2025-08-05T05:45:17+0000");
  script_cve_id("CVE-2023-24860");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_tag(name:"last_modification", value:"2025-08-05 05:45:17 +0000 (Tue, 05 Aug 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-04-11 21:15:00 +0000 (Tue, 11 Apr 2023)");
  script_tag(name:"creation_date", value:"2023-04-12 11:14:20 +0530 (Wed, 12 Apr 2023)");
  script_tag(name:"qod_type", value:"executable_version");
  script_name("Microsoft Malware Protection Engine DoS Vulnerability (Apr 2023)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft security update April 2023.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present
  on the target host.");

  script_tag(name:"insight", value:"The flaw exists due to an insufficient validation
  of user-supplied input in Microsoft Defender.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to conduct denial of service (DoS) attack on target systems.");

  script_tag(name:"affected", value:"Malware Protection Engine prior to 1.1.20200.4
  on Microsoft Windows");

  script_tag(name:"solution", value:"The vendor has released updates. Please see the references
  for more information.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_xref(name:"URL", value:"https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/microsoft-defender-antivirus-updates?view=o365-worldwide");
  script_xref(name:"URL", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24860");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("smb_reg_service_pack.nasl", "gb_ms_defender_smb_login_detect.nasl");


  script_mandatory_keys("SMB/WindowsVersion", "microsoft/defender/mpe_version");
  exit(0);
}

include("smb_nt.inc");
include("secpod_reg.inc");
include("version_func.inc");

mpe_version = get_kb_item("microsoft/defender/mpe_version");
if(!mpe_version)
  exit(0);

##First version of the Microsoft Malware Protection Engine with this vulnerability addressed 1.1.20200.4
if(version_is_less(version:mpe_version, test_version:"1.1.20200.4")){
  report = report_fixed_ver(installed_version:mpe_version, fixed_version: "1.1.20200.4 or higher");
  security_message(data:report);
  exit(0);
}
exit(99);