LibreOffice < 26.2.6 / 26.8.x < 26.8.1 Heap Buffer Overflow

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

include('compat.inc');

if (description)
{
  script_id(380158);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/11/13");

  script_cve_id("CVE-2026-76181");
  script_xref(name:"IAVB", value:"2026-B-0325");

  script_name(english:"LibreOffice < 26.2.6 / 26.8.x < 26.8.1 Heap Buffer Overflow");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote host is affected by a heap buffer overflow vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of LibreOffice installed on the remote host is prior to 26.2.6, or 26.8.x prior to 26.8.1. It is,
therefore, affected by a heap buffer overflow vulnerability:

  - LibreOffice includes a dBASE database driver, which reads dBASE tables and their .ndx index files when a
    folder of dBASE files is used as a data source. A heap buffer overflow existed when an index page was read.
    The number of entries recorded in a page was not checked against the number of entries the page could hold,
    which comes from a different field of the index header. A crafted index could also make a page refer back to
    itself, so that reading it recursed without end. (CVE-2026-76181)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://www.libreoffice.org/about-us/security/advisories/cve-2026-76181
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5b314f98");
  script_set_attribute(attribute:"solution", value:
"Upgrade to LibreOffice version 26.2.6 / 26.8.1 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-76181");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/11/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/11/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/11/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:libreoffice:libreoffice");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("libreoffice_installed.nasl", "macosx_libreoffice_installed.nasl");
  script_require_keys("installed_sw/LibreOffice");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'LibreOffice', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '26.2.6'},
        {'min_version': '26.8.0', 'fixed_version': '26.8.1'}
      ]
    }
  ]
};

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