Microsoft .NET Framework Information Disclosure Vulnerability (KB4480056)

# SPDX-FileCopyrightText: 2019 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("1.3.6.1.4.1.25623.1.0.814730");
  script_version("2023-07-14T16:09:27+0000");
  script_cve_id("CVE-2019-0545");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2023-07-14 16:09:27 +0000 (Fri, 14 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-01-14 20:54:00 +0000 (Mon, 14 Jan 2019)");
  script_tag(name:"creation_date", value:"2019-01-09 16:36:42 +0530 (Wed, 09 Jan 2019)");
  script_name("Microsoft .NET Framework Information Disclosure Vulnerability (KB4480056)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB4480056");

  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 error in .NET
  Framework and .NET Core which allows bypassing Cross-origin Resource Sharing
  (CORS) configurations.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to gain access to potentially sensitive information.");

  script_tag(name:"affected", value:"Microsoft .NET Framework 3.5 and 4.7.2 for Microsoft Windows 10 version 1809.");

  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/4480056/");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone AG");
  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);
}
edgeVer = fetch_file_version(sysPath:sysPath, file_name:"edgehtml.dll");
if(!edgeVer){
  exit(0);
}

if(edgeVer =~ "^11\.0\.17763")
{
  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;
            dllVer = fetch_file_version(sysPath:dotPath, file_name:"webengine.dll");
            if(dllVer)
            {
              if(version_is_less(version:dllVer, test_version:"4.7.3282.0")){
                report = report_fixed_ver(file_checked:dotPath + "webengine.dll",
                                          file_version:dllVer, vulnerable_range:"Less than 4.7.3282.0");
                security_message(data:report);
                exit(0);
              }
            }
          }
        }
      }
    }

    if("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)
        {
          dllVer = fetch_file_version(sysPath:dotPath, file_name:"webengine.dll");
          if(dllVer)
          {
            if(version_is_less(version:dllVer, test_version:"4.7.3282.0")){
              report = report_fixed_ver(file_checked:dotPath + "\webengine.dll",
                                          file_version:dllVer, vulnerable_range:"Less than 4.7.3282.0");
              security_message(data:report);
              exit(0);
            }
          }
        }
      }
    }
  }
}
exit(99);