Fortinet Fortigate - Lack of certificate verification when establishing secure connections with threat feed fabric connectors (FG-IR-22-257)

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

include('compat.inc');

if (description)
{
  script_id(174403);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/17");

  script_cve_id("CVE-2022-39948");
  script_xref(name:"IAVA", value:"2023-A-0110-S");

  script_name(english:"Fortinet Fortigate - Lack of certificate verification when establishing secure connections with threat feed fabric connectors (FG-IR-22-257)");

  script_set_attribute(attribute:"synopsis", value:
"Fortinet Firewall is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The version of Fortigate installed on the remote host is prior to tested version. It is, therefore, affected by a
vulnerability as referenced in the FG-IR-22-257 advisory.

  - An improper certificate validation vulnerability [CWE-295] in FortiOS 7.2.0 through 7.2.3, 7.0.0 through
    7.0.7, 6.4 all versions, 6.2 all versions, 6.0 all versions and FortiProxy 7.0.0 through 7.0.6, 2.0 all
    versions, 1.2 all versions may allow a remote and unauthenticated attacker to perform a Man-in-the-Middle
    attack on the communication channel between the FortiOS/FortiProxy device and remote servers hosting
    threat feeds (when the latter are configured as Fabric connectors in FortiOS/FortiProxy) (CVE-2022-39948)

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://www.fortiguard.com/psirt/FG-IR-22-257");
  script_set_attribute(attribute:"solution", value:
"Please upgrade to FortiProxy version 7.2.0 or above 
Please upgrade to FortiProxy version 7.0.7 or above 
Please upgrade to FortiOS version 7.2.4 or above 
Please upgrade to FortiOS version 7.0.8 or above");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/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:H/PR:N/UI:N/S:U/C:H/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-2022-39948");

  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:"2023/02/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/02/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/04/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:fortinet:fortiproxy");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("fortinet_version.nbin");
  script_require_keys("Host/Fortigate/model", "Host/Fortigate/version");

  exit(0);
}

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

var app_name = 'Fortigate';
var app_info = vcf::get_app_info(app:app_name, kb_ver:'Host/Fortigate/version');
vcf::fortios::verify_product_and_model(product_name:app_name);

var constraints = [
  { 'min_version' : '6.0.0', 'max_version' : '6.0.16', 'fixed_display' : '7.0.8' },
  { 'min_version' : '6.2.0', 'max_version' : '6.2.14', 'fixed_display' : '7.0.8' },
  { 'min_version' : '6.4.0', 'max_version' : '6.4.12', 'fixed_display' : '7.0.8' },
  { 'min_version' : '7.0.0', 'fixed_version' : '7.0.8' },
  { 'min_version' : '7.2.0', 'fixed_version' : '7.2.4' }
];

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