ISC BIND 9.16.0 < 9.18.41 / 9.16.8-S1 < 9.18.41-S1 / 9.18.0 < 9.18.41 / 9.18.11-S1 < 9.18.41-S1 / 9.20.0 < 9.20.15 / 9.20.9-S1 < 9.20.15-S1 / 9.21.0 < 9.21.14 Vulnerability (cve-2025-40780)

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

include('compat.inc');

if (description)
{
  script_id(298817);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/12");

  script_cve_id("CVE-2025-40780");

  script_name(english:"ISC BIND 9.16.0 < 9.18.41 / 9.16.8-S1 < 9.18.41-S1 / 9.18.0 < 9.18.41 / 9.18.11-S1 < 9.18.41-S1 / 9.20.0 < 9.20.15 / 9.20.9-S1 < 9.20.15-S1 / 9.21.0 < 9.21.14 Vulnerability (cve-2025-40780)");

  script_set_attribute(attribute:"synopsis", value:
"The remote name server is affected by a vulnerability vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of ISC BIND installed on the remote host is prior to tested version. It is, therefore, affected by a
vulnerability as referenced in the cve-2025-40780 advisory.

  - In specific circumstances, due to a weakness in the Pseudo Random Number Generator (PRNG) that is used, it
    is possible for an attacker to predict the source port and query ID that BIND will use. This issue affects
    BIND 9 versions 9.16.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through
    9.21.12, 9.16.8-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.
    (CVE-2025-40780)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://kb.isc.org/v1/docs/cve-2025-40780");
  script_set_attribute(attribute:"solution", value:
"Upgrade to ISC BIND version 9.18.41 / 9.18.41-S1 / 9.20.15 / 9.20.15-S1 / 9.21.14 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-40780");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/10/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/12");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:isc:bind");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

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

  script_dependencies("bind_version.nasl");
  script_require_keys("bind/version", "Settings/ParanoidReport");

  exit(0);
}

include('vcf.inc');
include('vcf_extras.inc');

vcf::bind::initialize();

var app_info = vcf::get_app_info(app:'BIND', port:53, kb_ver:'bind/version', service:TRUE, proto:'UDP');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var constraints = [
  { 'min_version' : '9.16.0', 'max_version' : '9.16.50', 'fixed_version' : '9.18.41' },
  { 'min_version' : '9.16.8-S1', 'max_version' : '9.16.50-S1', 'fixed_version' : '9.18.41-S1' },
  { 'min_version' : '9.18.0', 'max_version' : '9.18.39', 'fixed_version' : '9.18.41' },
  { 'min_version' : '9.18.11-S1', 'max_version' : '9.18.39-S1', 'fixed_version' : '9.18.41-S1' },
  { 'min_version' : '9.20.0', 'max_version' : '9.20.13', 'fixed_version' : '9.20.15' },
  { 'min_version' : '9.20.9-S1', 'max_version' : '9.20.13-S1', 'fixed_version' : '9.20.15-S1' },
  { 'min_version' : '9.21.0', 'max_version' : '9.21.12', 'fixed_version' : '9.21.14' }
];
constraints = vcf::bind::filter_constraints(constraints:constraints, version:app_info.version);

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_HOLE
);