Fortinet Fortigate - Privilege escalation via switch-control CLI command (FG-IR-21-242)

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

include('compat.inc');

if (description)
{
  script_id(165982);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/02/24");

  script_cve_id("CVE-2021-44171");
  script_xref(name:"IAVA", value:"2022-A-0401-S");

  script_name(english:"Fortinet Fortigate - Privilege escalation via switch-control CLI command (FG-IR-21-242)");

  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-21-242 advisory.

  - Animproper neutralization of special elements used in an os command [CWE-78] vulnerability in FortiOSmay
    allow an authenticated attacker to execute privileged commands on a linked FortiSwitch via diagnostic CLI
    commands. (CVE-2021-44171)

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:"solution", value:
"Upgrade to Fortigate version 6.0.15 / 6.2.11 / 6.4.9 / 7.0.7 or later.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-44171");

  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:"2022/10/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/10/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/10/10");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fortinet:fortios");
  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) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  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' : '6.0.14', 'fixed_version' : '6.0.15' },
  { 'min_version' : '6.2.0', 'max_version' : '6.2.10', 'fixed_version' : '6.2.11' },
  { 'min_version' : '6.4.0', 'max_version' : '6.4.8', 'fixed_version' : '6.4.9' },
  { 'min_version' : '7.0.0', 'max_version' : '7.0.3', 'fixed_version' : '7.0.7' }
];

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