Citrix ADC and Citrix NetScaler Gateway Multiple Vulnerabilities (CTX330728)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(155584);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/12");

  script_cve_id("CVE-2021-22955", "CVE-2021-22956");
  script_xref(name:"IAVA", value:"2021-A-0553");

  script_name(english:"Citrix ADC and Citrix NetScaler Gateway Multiple Vulnerabilities (CTX330728)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote Citrix ADC or Citrix NetScaler Gateway device is version 11.1.x prior to 11.1-65.23, 12.1.x prior to
12.1-63.22, 12.1-FIPS prior to 12.1-55.257, 13.0.x prior to 13.0-83.27, or 13.1.x prior to 13.1-4.43.
It is, therefore, affected by multiple vulnerabilities:

  - Unauthenticated denial of service (CVE-2021-22955)

  - Temporary disruption of the Management GUI, Nitro API and RPC communication (CVE-2021-22956)

Please refer to advisory CTX330728 for more information.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://support.citrix.com/article/CTX330728");
  script_set_attribute(attribute:"solution", value:
"For versions 11.1.x, 12.1.x, 12.1-FIPS, 13.0.x, and 13.1.x, upgrade to 11.1-65.23, 12.1-55.257-FIPS, 12.1-63.22, 13.0-83.27, and 13.1-4.43, or later, respectively.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
  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:N/UI:N/S:U/C:N/I:N/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-2021-22956");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/11/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/11/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/18");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:citrix:netscaler_gateway");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:citrix:netscaler_application_delivery_controller");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("citrix_netscaler_detect.nbin");
  script_require_keys("Host/NetScaler/Detected");

  exit(0);
}

include('vcf_extras_netscaler.inc');

var app_info = vcf::citrix_netscaler::get_app_info();
var constraints;

if (app_info['fips_status'] == 1)
{
  if (preg(pattern:"^12.1.*", string:app_info['version']))
    constraints = [ {'min_version': '12.1', 'fixed_version': '12.1.55.257', 'fixed_display': '12.1-55.257 and later releases of 12.1-FIPS.'} ];
}
else
{
  constraints = [
  {'min_version': '11.1', 'fixed_version': '11.1.65.23', 'fixed_display':'11.1-65.23'},
  {'min_version': '12.1', 'fixed_version': '12.1.63.22', 'fixed_display':'12.1-63.22'},
  {'min_version': '13.0', 'fixed_version': '13.0.83.27', 'fixed_display':'13.0-83.27'},
  {'min_version': '13.1', 'fixed_version': '13.1.4.43',  'fixed_display':'13.1-4.43'}
  ];
}

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