Pi-hole Core < 5.18.3 SSRF/RCE Vulnerability

# SPDX-FileCopyrightText: 2024 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/a:pi-hole:pi-hole";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.114691");
  script_version("2025-11-06T05:40:15+0000");
  script_tag(name:"last_modification", value:"2025-11-06 05:40:15 +0000 (Thu, 06 Nov 2025)");
  script_tag(name:"creation_date", value:"2024-07-08 13:22:43 +0000 (Mon, 08 Jul 2024)");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2025-10-02 13:07:15 +0000 (Thu, 02 Oct 2025)");

  script_cve_id("CVE-2024-34361");

  script_tag(name:"qod_type", value:"remote_banner");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Pi-hole Core < 5.18.3 SSRF/RCE Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2024 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_pi-hole_consolidation.nasl");
  script_mandatory_keys("pi-hole/detected");

  script_tag(name:"summary", value:"Pi-hole Core is prone to a blind server-side request forgery
  (SSRF) vulnerability that can lead to remote code execution (RCE).");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"A vulnerability has been discovered that allows an authenticated
  user to make internal requests to the server via the 'gravity_DownloadBlocklistFromUrl()'
  function. Depending on some circumstances, the vulnerability could lead to remote command
  execution.");

  script_tag(name:"affected", value:"Pi-hole Core versions 5.18.2 and prior.");

  script_tag(name:"solution", value:"Update to version 5.18.3 or later.");

  script_xref(name:"URL", value:"https://github.com/pi-hole/pi-hole/security/advisories/GHSA-jg6g-rrj6-xfg6");
  script_xref(name:"URL", value:"https://github.com/pi-hole/pi-hole/pull/5694");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (!version = get_app_version(cpe: CPE, nofork: TRUE))
  exit(0);

if (version_is_less(version: version, test_version: "5.18.3")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.18.3");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);