Microsoft .NET Framework Information Disclosure Vulnerability (3205640)

# SPDX-FileCopyrightText: 2016 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("1.3.6.1.4.1.25623.1.0.809760");
  script_version("2026-04-28T06:28:06+0000");
  script_cve_id("CVE-2016-7270");
  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:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  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:"2018-10-12 22:14:00 +0000 (Fri, 12 Oct 2018)");
  script_tag(name:"creation_date", value:"2016-12-14 15:04:05 +0530 (Wed, 14 Dec 2016)");
  script_name("Microsoft .NET Framework Information Disclosure Vulnerability (3205640)");
  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft Bulletin MS16-155.");

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

  script_tag(name:"insight", value:"Flaw exists as .NET Framework improperly uses
  a developer-supplied key. When this key is misused, it is also possible for
  access to data to be temporarily lost.");

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

  script_tag(name:"affected", value:"Microsoft .NET Framework 4.6.2.");

  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_tag(name:"qod_type", value:"executable_version");

  script_xref(name:"URL", value:"https://support.microsoft.com/en-us/kb/3204805");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/94741");
  script_xref(name:"URL", value:"https://support.microsoft.com/en-us/kb/3204801");
  script_xref(name:"URL", value:"https://support.microsoft.com/en-us/kb/3204802");
  script_xref(name:"URL", value:"https://support.microsoft.com/en-us/kb/3206632");
  script_xref(name:"URL", value:"https://technet.microsoft.com/library/security/ms16-155");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 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, win2008r2:2, win8_1:1, win8_1x64:1,
                   win2012:1, win2012R2:1, win10:1, win10x64:1, win2016:1) <= 0){
  exit(0);
}

sysPath = smb_get_system32root();
if(!sysPath){
  exit(0);
}

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

## NET Framework 4.6.2
key = "SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Client\";
if(registry_key_exists(key:key))
{
  pathv46 = registry_get_sz(key:key, item:"InstallPath");
  if(pathv46)
  {
    dllv46 = fetch_file_version(sysPath:pathv46, file_name:"system.data.dll");
    if(dllv46)
    {
      ## .NET Framework 4.6.2
      ##win8.1x86 updates system.data.dll file
      if(hotfix_check_sp(win7:2, win7x64:2, win2008r2:2, win2012:1, win8_1x64:1, win2012R2:1, win8_1:1) > 0)
      {
        if(version_in_range(version:dllv46, test_version:"4.6", test_version2:"4.6.1635"))
        {
          report = 'File checked:     ' + pathv46 + "system.data.dll" + '\n' +
                   'File version:     ' + dllv46  + '\n' +
                   'Vulnerable range: ' + "4.6 - 4.6.1635" + '\n' ;
          security_message(data:report);
          exit(0);
        }
      }
    }
  }
}

if(hotfix_check_sp(win10:1, win10x64:1, win2016:1) > 0)
{
  edgeVer = fetch_file_version(sysPath:sysPath, file_name:"edgehtml.dll");
  if(!edgeVer){
    exit(0);
  }
  if(edgeVer && version_in_range(version:edgeVer, test_version:"11.0.14393.0", test_version2:"11.0.14393.575"))
  {
    report = 'File checked:     ' + sysPath + "\edgehtml.dll" + '\n' +
             'File version:     ' + edgeVer  + '\n' +
             'Vulnerable range: 11.0.14393.0 - 11.0.14393.575' + '\n' ;
    security_message(data:report);
    exit(0);

  }
}