PowerDNS Authoritative Server < 3.4.11 / 4.0 < 4.0.2 DoS Vulnerabilities

# SPDX-FileCopyrightText: 2018 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("1.3.6.1.4.1.25623.1.0.141466");
  script_version("2023-07-20T05:05:18+0000");
  script_tag(name:"last_modification", value:"2023-07-20 05:05:18 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"creation_date", value:"2018-09-11 10:27:37 +0700 (Tue, 11 Sep 2018)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-09 23:19:00 +0000 (Wed, 09 Oct 2019)");

  script_cve_id("CVE-2016-7072", "CVE-2016-2120");

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

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

  script_name("PowerDNS Authoritative Server < 3.4.11 / 4.0 < 4.0.2 DoS Vulnerabilities");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("pdns_version.nasl");
  script_mandatory_keys("powerdns/authoritative_server/installed");

  script_tag(name:"summary", value:"An issue has been found in PowerDNS Authoritative Server allowing a remote,
unauthenticated attacker to cause a denial of service by opening a large number of TCP connections to the web
server. If the web server runs out of file descriptors, it triggers an exception and terminates the whole PowerDNS
process. While it's more complicated for an unauthorized attacker to make the web server run out of file
descriptors since its connection will be closed just after being accepted, it might still be possible.");

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

  script_tag(name:"affected", value:"PowerDNS Authoritative Server version 3.4.10, 4.0.1 and prior.");

  script_tag(name:"solution", value:"Upgrade to version 3.4.11, 4.0.2 or later.");

  script_xref(name:"URL", value:"https://doc.powerdns.com/md/security/powerdns-advisory-2016-03/");
  script_xref(name:"URL", value:"https://doc.powerdns.com/md/security/powerdns-advisory-2016-05/");

  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: "3.4.11")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.4.11");
  security_message(data: report, port: port, proto: proto);
  exit(0);
}

if (version_in_range(version: version, test_version: "4.0.0", test_version2: "4.0.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.0.2");
  security_message(data: report, port: port, proto: proto);
  exit(0);
}

exit(0);