Notepad++ Hex Editor Plugin BOF Vulnerability (Aug 2017)

# 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

CPE = "cpe:/a:notepad-plus-plus:notepad++";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.811586");
  script_version("2026-02-13T05:57:48+0000");
  script_cve_id("CVE-2017-8803");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2026-02-13 05:57:48 +0000 (Fri, 13 Feb 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:"2021-09-13 11:26:00 +0000 (Mon, 13 Sep 2021)");
  script_tag(name:"creation_date", value:"2017-08-22 14:00:19 +0530 (Tue, 22 Aug 2017)");
  script_name("Notepad++ Hex Editor Plugin BOF Vulnerability (Aug 2017)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Buffer overflow");
  script_dependencies("gb_notepadpp_detect_portable_win.nasl", "gb_notepadpp_detect_win.nasl");
  script_mandatory_keys("Notepad++32/Win/installed");
  script_require_ports(139, 445);

  script_xref(name:"URL", value:"https://github.com/wlinzi/security_advisories/tree/master/CVE-2017-8803");

  script_tag(name:"summary", value:"Notepad++ is prone to a buffer overflow (BOF) vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version of Notepad++ and the Hex Editor
  Plugin is present on the target host.");

  script_tag(name:"insight", value:"The flaw is due to a 'Data from Faulting Address controls Code
  Flow' issue in Hex Editor in Notepad++.");

  script_tag(name:"impact", value:"Successful exploitation will allow user-assisted attackers to
  execute code via a crafted file.");

  script_tag(name:"affected", value:"Notepad++ version 7.3.3 (32-bit) with Hex Editor Plugin version
  0.9.5 on Windows.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year
  since the disclosure of this vulnerability. Likely none will be provided anymore. General solution
  options are to upgrade to a newer release, disable respective features, remove the product or
  replace the product by another one.");

  script_tag(name:"qod_type", value:"executable_version");
  script_tag(name:"solution_type", value:"WillNotFix");

  exit(0);
}

include("smb_nt.inc");
include("version_func.inc");
include("secpod_smb_func.inc");
include("host_details.inc");

if( ! infos = get_app_version_and_location( cpe:CPE, exit_no_version:TRUE ) )
  exit( 0 );

vers = infos["version"];
path = infos["location"];

if( vers != "7.3.3" || ! path || "Could not find the install location from registry" >< path )
  exit( 0 );

if( ! dllVer = fetch_file_version( sysPath:path, file_name:"plugins\hexeditor.dll" ) )
  exit( 0 );

if( dllVer == "0.9.5.0" ) {
  report = report_fixed_ver( installed_version:"Notepad++ version " + vers + ", Hex Editor version" + dllVer, fixed_version:"None", install_path:path );
  security_message( port:0, data:report );
  exit( 0 );
}

exit( 0 );