Microsoft .NET Framework Remote Code Execution Vulnerability (KB4040979)

###############################################################################
# OpenVAS Vulnerability Test
#
# Microsoft .NET Framework Remote Code Execution Vulnerability (KB4040979)
#
# Authors:
# Rinu Kuriakose <[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("1.3.6.1.4.1.25623.1.0.811816");
  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 09:32:37 +0530 (Wed, 13 Sep 2017)");
  script_name("Microsoft .NET Framework Remote Code Execution Vulnerability (KB4040979)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB4040979");

  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 improper
  processing of untrusted input.");

  script_tag(name:"impact", value:"Successful exploitation will allow
  an attacker to take control of an affected system. An attacker could then
  install programs, view, change, or delete data, or create new accounts with
  full user rights. Users whose accounts are configured to have fewer user rights
  on the system could be less impacted than users who operate with administrative
  user rights.");

  script_tag(name:"affected", value:"Microsoft .NET Framework 3.5 on Microsoft Windows Server 2012.");

  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/4040979");
  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_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(win2012:1) <= 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)
  {
    sysdllVer = fetch_file_version(sysPath:dotPath, file_name:"System.management.dll");
    if(sysdllVer)
    {
      ## .NET Framework 3.5
      if(version_in_range(version:sysdllVer, test_version:"2.0.50727.5700", test_version2:"2.0.50727.8765"))
      {
        report = 'File checked:     ' + dotPath + "\System.management.dll" + '\n' +
                 'File version:     ' + sysdllVer  + '\n' +
                 'Vulnerable range:  2.0.50727.5700 - 2.0.50727.8765\n' ;
        security_message(data:report);
        exit(0);
      }
    }
  }
}
exit(0);