Curl 8.8.0 < 8.14.0 Improper Certificate Validation (CVE-2025-4947)

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

include('compat.inc');

if (description)
{
  script_id(237583);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/06/05");

  script_cve_id("CVE-2025-4947");
  script_xref(name:"IAVA", value:"2025-A-0379-S");

  script_name(english:"Curl 8.8.0 < 8.14.0 Improper Certificate Validation (CVE-2025-4947)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has a program that is affected by a improper certificate validation vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Curl installed on the remote host is is missing security update. It is, therefore, affected by a
improper certificate validation vulnerability.

  - libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host 
    specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle 
    attacks. (CVE-2025-4947)

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-2025-4947.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade Curl to version 8.14.0 or later");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-4947");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/05/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/30");

  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:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025 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('vcf.inc');

var win_local;
if (!empty_or_null(get_kb_item('SMB/Registry/Enumerated')))
  win_local = TRUE;
else
  win_local = FALSE;

var app_info = vcf::get_app_info(app:'Curl', win_local:win_local);

vcf::check_all_backporting(app_info:app_info);

var constraints = [ 
  {'min_version': '8.8.0', 'fixed_version': '8.14.0'}
];

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