Windows Remote Desktop Protocol (RDP) Denial of Service Vulnerability (KB4093227)

# 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("1.3.6.1.4.1.25623.1.0.812586");
  script_version("2023-07-20T05:05:17+0000");
  script_cve_id("CVE-2018-0976");
  script_tag(name:"cvss_base", value:"3.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:N/A:P");
  script_tag(name:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");
  script_tag(name:"creation_date", value:"2018-04-11 10:10:51 +0530 (Wed, 11 Apr 2018)");
  script_name("Windows Remote Desktop Protocol (RDP) Denial of Service Vulnerability (KB4093227)");

  script_tag(name:"summary", value:"This host is missing an important security update according to
  Microsoft KB4093227.");

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

  script_tag(name:"insight", value:"The flaw exists in the Remote Desktop Protocol (RDP) when an
  attacker connects to the target system using RDP and sends specially crafted requests.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker to cause the RDP
  service on the target system to stop responding.");

  script_tag(name:"affected", value:"Microsoft Windows Server 2008 x32/x64 Edition Service Pack 2.");

  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_tag(name:"qod_type", value:"executable_version");
  script_xref(name:"URL", value:"https://support.microsoft.com/en-us/help/4093227");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("smb_reg_service_pack.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/WindowsVersion");
  exit(0);
}

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

if(hotfix_check_sp(win2008:3, win2008x64:3) <= 0)
  exit(0);

if(!sysPath = smb_get_system32root())
  exit(0);

if(!vers = fetch_file_version(sysPath:sysPath, file_name:"scksp.dll"))
  exit(0);

if(version_is_less(version:vers, test_version:"6.0.6002.24329")) {
  report = report_fixed_ver(file_checked:sysPath + "\scksp.dll", file_version:vers, vulnerable_range:"Less than 6.0.6002.24329");
  security_message(port:0, data:report);
  exit(0);
}

exit(99);