PowerDNS Authoritative Server <= 4.0.4 DoS Vulnerability (2017-04)

# SPDX-FileCopyrightText: 2017 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:powerdns:authoritative_server";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140542");
  script_version("2025-10-31T05:40:56+0000");
  script_tag(name:"last_modification", value:"2025-10-31 05:40:56 +0000 (Fri, 31 Oct 2025)");
  script_tag(name:"creation_date", value:"2017-11-28 08:39:40 +0700 (Tue, 28 Nov 2017)");
  script_tag(name:"cvss_base", value:"5.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-09 23:24:00 +0000 (Wed, 09 Oct 2019)");

  script_cve_id("CVE-2017-15091");

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

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

  script_name("PowerDNS Authoritative Server <= 4.0.4 DoS Vulnerability (2017-04)");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_powerdns_dns_detect.nasl");
  script_mandatory_keys("powerdns/authoritative_server/detected");

  script_tag(name:"summary", value:"PowerDNS Authoritative Server is prone to a denial of service
  (DoS) vulnerability.");

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

  script_tag(name:"insight", value:"An issue has been found in the API component of PowerDNS
  Authoritative Server, where some operations that have an impact on the state of the server are
  still allowed even though the API has been configured as read-only via the api-readonly keyword.
  This missing check allows an attacker with valid API credentials could flush the cache, trigger a
  zone transfer or send a NOTIFY.");

  script_tag(name:"impact", value:"A remote attacker may cause a partial DoS condition.");

  script_tag(name:"affected", value:"PowerDNS Authoritative Server version 4.0.4 and prior.");

  script_tag(name:"solution", value:"Update to version 4.0.5 or later.");

  script_xref(name:"URL", value:"https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2017-04.html");

  exit(0);
}

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

if (!port = get_app_port(cpe: CPE))
  exit(0);

if (!infos = get_app_version_and_proto(cpe: CPE, port: port))
  exit(0);

version = infos["version"];
proto = infos["proto"];

if (version_is_less(version: version, test_version: "4.0.5")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.0.5");
  security_message(data: report, port: port, proto: proto);
  exit(0);
}

exit(99);