Curl 8.11.0 < 8.23.0 HSTS Policy Loss

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

include('compat.inc');

if (description)
{
  script_id(371146);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/23");

  script_cve_id("CVE-2026-87862");
  script_xref(name:"IAVA", value:"2026-A-1143");

  script_name(english:"Curl 8.11.0 < 8.23.0 HSTS Policy Loss");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has a program that is affected by a policy handling vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of curl installed on the remote host is 8.11.0 prior to 8.23.0. It is, therefore, affected by
a policy handling vulnerability:

  - Importing a includeSubDomains parent HSTS entry before a longer-lived child entry, silently drops
    the child. Consequently, when the parent expires, the child's valid HSTS policy is lost, causing
    curl to issue unencrypted HTTP requests rather than upgrading to HTTPS. (CVE-2026-87862)

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://curl.se/docs/CVE-2026-87862.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade Curl to version 8.23.0 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"manual");
  script_set_attribute(attribute:"cvss_score_rationale", value:"score from an analysis done by Tenable");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"asset_categories", value:"component");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:haxx:curl");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  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("curl_win_installed.nbin", "curl_nix_installed.nbin");
  script_require_keys("installed_sw/Curl");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'Curl', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'min_version': '8.11.0', 'fixed_version': '8.23.0'}
      ]
    }
  ]
};

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