HCL Traveler for Microsoft Outlook < 3.0.16 DLL Hijacking (CVE-2026-21770)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(331333);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/31");

  script_cve_id("CVE-2026-21770");
  script_xref(name:"IAVA", value:"2026-A-0770");

  script_name(english:"HCL Traveler for Microsoft Outlook < 3.0.16 DLL Hijacking (CVE-2026-21770)");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote Windows host is affected by a DLL hijacking vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of HCL Traveler for Microsoft Outlook (HTMO) installed on the
remote host is prior to 3.0.16. It is, therefore, affected by a DLL hijacking
vulnerability which could allow an attacker to modify or replace the
application with malicious content.

Note that Nessus has not tested for this issue but has instead relied only on
the application's self-reported version number.");
  # https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0130919
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?804a1031");
  script_set_attribute(attribute:"solution", value:
"Upgrade to HCL Traveler for Microsoft Outlook (HTMO) version 3.0.16 or later.");
  script_set_attribute(attribute:"agent", value:"windows");

  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:M/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-21770");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/07/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/31");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:hcltech:traveler_for_microsoft_outlook");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("hcl_traveler_installed_win.nbin");
  script_require_keys("installed_sw/HCL Traveler");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'HCL Traveler', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '3.0.16'}
      ]
    }
  ]
};

var result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_WARNING);
vdf::handle_check_and_report_errors(vdf_result:result);