PowerDNS Recursor Crafted Answer 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:recursor';

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.141655");
  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 09:53:35 +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 23:33:00 +0000 (Wed, 09 Oct 2019)");

  script_cve_id("CVE-2018-10851");

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

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

  script_name("PowerDNS Recursor Crafted Answer 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/recursor/installed");

  script_tag(name:"summary", value:"An issue has been found in PowerDNS Recursor allowing a malicious
authoritative server to cause a memory leak by sending specially crafted records. The issue is due to the fact
that some memory is allocated before the parsing and is not always properly released if the record is malformed.");

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

  script_tag(name:"affected", value:"PowerDNS Recursor versions 3.2 until 4.1.4.");

  script_tag(name:"solution", value:"Upgrade to version 4.0.9, 4.1.5 or later.");

  script_xref(name:"URL", value:"https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-04.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_in_range(version: version, test_version: "3.2", test_version2: "4.0.8")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.0.9");
  security_message(data: report, port: port, proto: proto);
  exit(0);
}

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);