Fortinet Fortigate Privilege escalation vulnerability using the automation script feature (FG-IR-20-131)

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

include('compat.inc');

if (description)
{
  script_id(209732);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/10/29");

  script_cve_id("CVE-2021-26110");
  script_xref(name:"IAVA", value:"2021-A-0574-S");

  script_name(english:"Fortinet Fortigate Privilege escalation vulnerability using the automation script feature (FG-IR-20-131)");

  script_set_attribute(attribute:"synopsis", value:
"Fortinet Firewall is affected by a privilege escalation.");
  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-20-131 advisory.

  - An improper access control vulnerability [CWE-284] in FortiOS autod daemon 7.0.0, 6.4.6 and below, 6.2.9
    and below, 6.0.12 and below and FortiProxy 2.0.1 and below, 1.2.9 and below may allow an authenticated
    low-privileged attacker to escalate their privileges to super_admin via a specific crafted configuration
    of fabric automation CLI script and auto-script features. (CVE-2021-26110)

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-20-131");
  script_set_attribute(attribute:"solution", value:
"Please upgrade to FortiOS version 6.0.13/6.2.9/6.2.10/6.4.7/7.0.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/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-2021-26110");

  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:"2021/12/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/10/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fortinet:fortios");
  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) 2024 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_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' : '5.6', 'max_version' : '5.6', 'fixed_version' : '6.0.13' },
  { 'min_version' : '6.0.0', 'max_version' : '6.0.12', 'fixed_version' : '6.0.13' },
  { 'min_version' : '6.2.0', 'fixed_version' : '6.2.9' },
  { 'min_version' : '6.4.0', 'max_version' : '6.4.6', 'fixed_version' : '6.4.7' },
  { 'min_version' : '7.0.0', 'max_version' : '7.0.0', 'fixed_version' : '7.0.1' }
];

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