Microsoft .NET Framework Remote Code Execution Vulnerability (KB4040980)

###############################################################################
# OpenVAS Vulnerability Test
#
# Microsoft .NET Framework Remote Code Execution Vulnerability (KB4040980)
#
# Authors:
# Antu Sanadi <[email protected]>
#
# Copyright:
# Copyright (C) 2017 Greenbone Networks GmbH, http://www.greenbone.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# 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("1.3.6.1.4.1.25623.1.0.811322");
  script_version("2020-06-04T12:11:49+0000");
  script_cve_id("CVE-2017-8759");
  script_bugtraq_id(100742);
  script_tag(name:"cvss_base", value:"9.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_tag(name:"last_modification", value:"2020-06-04 12:11:49 +0000 (Thu, 04 Jun 2020)");
  script_tag(name:"creation_date", value:"2017-09-13 14:11:50 +0530 (Wed, 13 Sep 2017)");
  script_tag(name:"qod_type", value:"executable_version");
  script_name("Microsoft .NET Framework Remote Code Execution Vulnerability (KB4040980)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB4040980");

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

  script_tag(name:"insight", value:"A remote code execution vulnerability exists
  when Microsoft .NET Framework processes untrusted input. An attacker who
  successfully exploited this vulnerability in software using the .NET framework
  could take control of an affected system.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote
  attackers to execute code.");

  script_tag(name:"affected", value:"Microsoft .NET Framework 3.5.1.");

  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://support.microsoft.com/en-us/help/4040980");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone Networks GmbH");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("smb_reg_service_pack.nasl");
  script_mandatory_keys("SMB/WindowsVersion");
  script_require_ports(139, 445);
  exit(0);
}


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

if(hotfix_check_sp( win7:2, win7x64:2, win2008r2:2 ) <= 0){
  exit(0);
}

key = "SOFTWARE\Microsoft\ASP.NET\";
if(!registry_key_exists(key:key)){
  exit(0);
}

foreach item (registry_enum_keys(key:key))
{
  dotpath = registry_get_sz(key:key + item, item:"Path");
  if(dotpath && "\Microsoft.NET\Framework" >< dotpath)
  {
    dllVer = fetch_file_version(sysPath:dotpath, file_name:"System.dll");
    if(dllVer)
    {
      ##.NET Framework 3.5.1 for Windows Server 2012: September 12, 2017
      if(version_in_range(version:dllVer, test_version:"2.0.50727.8000", test_version2:"2.0.50727.8769"))
      {
        report = 'File checked:     ' + dotpath + "\system.dll" + '\n' +
                 'File version:     ' + dllVer  + '\n' +
                 'Vulnerable range: 2.0.50727.8000 - 2.0.50727.8769' + '\n' ;
        security_message(data:report);
        exit(0);
      }
    }
  }
}