Microsoft Windows Server Message Block 3.1.1 RCE Vulnerability (KB4551762)

# Copyright (C) 2020 Greenbone Networks GmbH
# Text descriptions are largely excerpted from the rsleferenced
# advisory, and are Copyright (C) the respective author(s)
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# 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("1.3.6.1.4.1.25623.1.0.816800");
  script_version("2022-08-09T10:11:17+0000");
  script_xref(name:"CISA", value:"Known Exploited Vulnerability (KEV) catalog");
  script_xref(name:"URL", value:"https://www.cisa.gov/known-exploited-vulnerabilities-catalog");
  script_cve_id("CVE-2020-0796");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2022-08-09 10:11:17 +0000 (Tue, 09 Aug 2022)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-06-11 19:15:00 +0000 (Thu, 11 Jun 2020)");
  script_tag(name:"creation_date", value:"2020-03-12 13:00:37 +0000 (Thu, 12 Mar 2020)");
  script_name("Microsoft Windows Server Message Block 3.1.1 RCE Vulnerability (KB4551762)");

  script_tag(name:"summary", value:"This host is missing a critical security
  update according to Microsoft KB4551762");

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

  script_tag(name:"insight", value:"The vulnerability is due to an error when the
  SMBv3 handles maliciously crafted compressed data packets. Both SMB Servers and
  clients are affected. To exploit the vulnerability against an SMB Server, an
  unauthenticated attacker could send a specially crafted packet to a targeted SMBv3
  Server. While as to exploit the vulnerability against an SMB Client, an
  unauthenticated attacker would need to configure a malicious SMBv3 Server and
  convince a user to connect to it.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to execute code on the target SMB Server or SMB Client.");

  script_tag(name:"affected", value:"SMB 3.1.1(SMBv3) on

  - Windows 10 Version 1903 for 32-bit/x64-based Systems

  - Windows 10 Version 1909 for 32-bit/x64-based Systems");

  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-gb/help/4551762/");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
  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(win10:1, win10x64:1) <= 0){
  exit(0);
}

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

fileVer = fetch_file_version(sysPath:sysPath, file_name:"Gdiplus.dll");
if(!fileVer){
  exit(0);
}

if(version_in_range(version:fileVer, test_version:"10.0.18362.0", test_version2:"10.0.18362.719"))
{
  report = report_fixed_ver(file_checked:sysPath + "\Gdiplus.dll",
                            file_version:fileVer, vulnerable_range:"10.0.18362.0 - 10.0.18362.719");
  security_message(data:report);
  exit(0);
}
exit(99);