Microsoft .NET Framework Multiple Vulnerabilities (KB4470640)

# 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("1.3.6.1.4.1.25623.1.0.814703");
  script_version("2023-07-20T05:05:17+0000");
  script_cve_id("CVE-2018-8517", "CVE-2018-8540");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-09-28 12:58:00 +0000 (Mon, 28 Sep 2020)");
  script_tag(name:"creation_date", value:"2018-12-12 11:38:29 +0530 (Wed, 12 Dec 2018)");
  script_name("Microsoft .NET Framework Multiple Vulnerabilities (KB4470640)");

  script_tag(name:"summary", value:"This host is missing a critical security
  update according to Microsoft KB4470640");

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

  script_tag(name:"insight", value:"Multiple flaws exist due to:

  - An error when .NET Framework improperly handles special web requests.

  - An error when the Microsoft .NET Framework fails to validate input properly.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to cause a denial of service condition and take control of an affected system.");

  script_tag(name:"affected", value:"- Microsoft .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Microsoft Windows 7 SP1 and Microsoft Windows Server 2008 R2 SP1

  - Microsoft .NET Framework 4.6 for Microsoft Windows Server 2008 SP2");

  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/4470640");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/106075");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/106073");
  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_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, win2008:3, win2008x64:3, win2008r2:2) <= 0){
  exit(0);
}

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

key_list = make_list("SOFTWARE\Microsoft\.NETFramework\", "SOFTWARE\Microsoft\ASP.NET\");
foreach key(key_list)
{
  if(".NETFramework" >< key)
  {
    foreach item (registry_enum_keys(key:key))
    {
      NetPath = registry_get_sz(key:key + item, item:"InstallRoot");
      if(NetPath && "\Microsoft.NET\Framework" >< NetPath)
      {
        foreach item (registry_enum_keys(key:key))
        {
          dotPath = NetPath + item;
          sysdllVer = fetch_file_version(sysPath:dotPath, file_name:"system.web.extensions.dll");
          if(sysdllVer)
          {
            if(version_in_range(version:sysdllVer, test_version:"4.6", test_version2:"4.7.3281")){
              VULN = TRUE;
            }
          }
        }
      }
    }
  }
  if((!VULN) && "ASP.NET" >< key)
  {
    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.web.extensions.dll");
        if(sysdllVer)
        {
          if(version_in_range(version:sysdllVer, test_version:"4.6", test_version2:"4.7.3281")){
            VULN = TRUE ;
          }
        }
      }
    }
  }
  if(VULN)
  {
    report = report_fixed_ver(file_checked:dotPath + "system.web.extensions.dll",
                              file_version:sysdllVer, vulnerable_range:"4.6 - 4.7.3281");
    security_message(data:report);
    exit(0);
  }
}
exit(99);