Pi-Hole Web 4.3.2 < 4.3.3 RCE

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

include('compat.inc');

if (description)
{
  script_id(242965);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/07/29");

  script_cve_id("CVE-2020-8816");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/06/10");

  script_name(english:"Pi-Hole Web 4.3.2 < 4.3.3 RCE");

  script_set_attribute(attribute:"synopsis", value:
"An ad-blocking DNS server web-based admin interface is affected by a remote code execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Pi-Hole Web running on the remote web server is 4.3.2 prior to 4.3.3. It is, therefore, affected by a
remote code execution vulnerability by privileged dashboard users via a crafted DHCP static lease.

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/advisories/GHSA-v4fw-xc8h-7p52");
  script_set_attribute(attribute:"see_also", value:"https://github.com/pi-hole/web/releases/tag/v4.3.3");
  script_set_attribute(attribute:"solution", value:
"Upgrade Pi-Hole Web to version 4.3.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-8816");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/02/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/07/29");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:pi-hole:pi-hole");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("pihole_web_detect.nbin");
  script_require_keys("installed_sw/Pi-Hole Web");

  exit(0);
}

include('vcf.inc');
include('http.inc');

var port = get_http_port(default:443);

var app_info = vcf::get_app_info(app:'Pi-Hole Web', webapp:true, port:port);

var constraints = [
  {'min_version': '4.3.2', 'fixed_version': '4.3.3'}
];

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