Fortinet Fortigate - header injection in proxy login page (FG-IR-22-362)

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

include('compat.inc');

if (description)
{
  script_id(174402);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/17");

  script_cve_id("CVE-2022-42472");
  script_xref(name:"IAVA", value:"2023-A-0110-S");

  script_name(english:"Fortinet Fortigate - header injection in proxy login page (FG-IR-22-362)");

  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-22-362 advisory.

  - A improper neutralization of crlf sequences in http headers ('http response splitting') in Fortinet
    FortiOS versions 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.11, 6.2.0 through 6.2.12,
    6.0.0 through 6.0.16, FortiProxy 7.2.0 through 7.2.1, 7.0.0 through 7.0.7, 2.0.0 through 2.0.10, 1.2.0
    through 1.2.13, 1.1.0 through 1.1.6 may allow an authenticated and remote attacker to perform an HTTP
    request splitting attack which gives attackers control of the remaining headers and body of the response.
    (CVE-2022-42472)

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-22-362");
  script_set_attribute(attribute:"solution", value:
"Please upgrade to FortiProxy version 7.2.2 or above 
Please upgrade to FortiProxy version 7.0.8 or above 
Please upgrade to FortiProxy version 2.0.11 or above 
Please upgrade to FortiOS version 7.2.3 or above 
Please upgrade to FortiOS version 7.0.9 or above 
Please upgrade to FortiOS version 6.4.13 or above");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/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:L/PR:L/UI:N/S:U/C:L/I:L/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-2022-42472");

  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' : '6.4.13' },
  { 'min_version' : '6.2.0', 'max_version' : '6.2.14', 'fixed_display' : '6.4.13' },
  { 'min_version' : '6.4.0', 'fixed_version' : '6.4.13' },
  { 'min_version' : '7.0.0', 'fixed_version' : '7.0.9' },
  { 'min_version' : '7.2.0', 'fixed_version' : '7.2.3' }
];

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