Ingress-NGINX Controller < 1.13.8 / 1.14.x < 1.14.4 / 1.15.x < 1.15.0 Configuration Injection

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

include('compat.inc');

if (description)
{
  script_id(301974);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/30");

  script_cve_id("CVE-2026-3288");
  script_xref(name:"IAVA", value:"2026-A-0217-S");

  script_name(english:"Ingress-NGINX Controller < 1.13.8 / 1.14.x < 1.14.4 / 1.15.x < 1.15.0 Configuration Injection");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of Ingress-NGINX controller installed on the remote host is prior to 1.13.8, 1.14.4, or 1.15.0. It is,
therefore, affected by a configuration injection vulnerability.

A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` Ingress
annotation can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of
the ingress-nginx controller, and disclosure of Secrets accessible to the controller. Note that in the default
installation, the controller can access all Secrets cluster-wide.

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://github.com/kubernetes/kubernetes/issues/137560");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Ingress-NGINX Controller 1.13.8, 1.14.4, 1.15.0, or later.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/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-2026-3288");

  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:"2026/03/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:kubernetes:nginx_ingress_controller");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("kubernetes_ingress_nginx_controller_linux_installed.nbin");
  script_require_keys("installed_sw/Kubernetes Ingress NGINX Controller");

  exit(0);
}

include('vdf.inc');

var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [{'scope': 'target', 'match': {'os': 'linux'}}],
  'checks': [
    {
      'product': {'name': 'Kubernetes Ingress NGINX Controller', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {
          'fixed_version': '1.13.8'
        },
        {
          'min_version': '1.14', 'fixed_version': '1.14.4', 'fixed_display': '1.14.4 / 1.15.0'
        }
      ]
    }
  ]
};

var result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_HOLE);
vdf::handle_check_and_report_errors(vdf_result:result);