PowerDNS Authoritative Server Packet Cache Pollution DoS Vulnerability

# 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("1.3.6.1.4.1.25623.1.0.141654");
  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:"2018-11-07 09:47:15 +0700 (Wed, 07 Nov 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 23:35:00 +0000 (Wed, 09 Oct 2019)");

  script_cve_id("CVE-2018-14626");

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

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

  script_name("PowerDNS Authoritative Server Packet Cache Pollution DoS Vulnerability");

  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
user to craft a DNS query that will cause an answer without DNSSEC records to be inserted into the packet cache
and be returned to clients asking for DNSSEC records, thus hiding the presence of DNSSEC signatures for a specific
qname and qtype. For a DNSSEC-signed domain, this means that DNSSEC validating clients will consider the answer to
be bogus until it expires from the packet cache, leading to a denial of service.");

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

  script_tag(name:"affected", value:"PowerDNS Authoritative Server versions 4.1.0 to 4.1.4.");

  script_tag(name:"solution", value:"Upgrade to version 4.1.5 or later.");

  script_xref(name:"URL", value:"https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2018-05.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_in_range(version: version, test_version: "4.1", test_version2: "4.1.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.1.5");
  security_message(data: report, port: port, proto: proto);
  exit(0);
}

exit(0);