Microsoft .NET Framework Remote Code Execution Vulnerability (KB4040975)

# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.811325");
  script_version("2026-04-28T06:28:06+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-2017-8759");
  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:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2024-07-24 17:11:20 +0000 (Wed, 24 Jul 2024)");
  script_tag(name:"creation_date", value:"2017-09-13 15:16:30 +0530 (Wed, 13 Sep 2017)");
  script_tag(name:"qod_type", value:"executable_version");
  script_name("Microsoft .NET Framework Remote Code Execution Vulnerability (KB4040975)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB4040975");

  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 4.5.2.");

  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_xref(name:"URL", value:"https://support.microsoft.com/en-us/help/4040975");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/100742");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  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(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)
  {
    dllVer = fetch_file_version(sysPath:dotpath, file_name:"System.dll");
    if(dllVer)
    {
      ## .NET Framework 4.5.2 for Windows Server 2012: September 12, 2017
      if(version_in_range(version:dllVer, test_version:"4.0.30319.36000", test_version2:"4.0.30319.36410"))
      {
        report = 'File checked:     ' + dotpath + "\system.dll" + '\n' +
                 'File version:     ' + dllVer  + '\n' +
                 'Vulnerable range: 4.0.30319.36000 - 4.0.30319.36410' + '\n' ;
        security_message(data:report);
        exit(0);
      }
    }
  }
}