PowerDNS Authoritative Server RESTful Vulnerability (2019-03)

# SPDX-FileCopyrightText: 2019 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("1.3.6.1.4.1.25623.1.0.142146");
  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:"2019-03-19 09:39:57 +0100 (Tue, 19 Mar 2019)");
  script_tag(name:"cvss_base", value:"6.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/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:"2019-04-05 05:29:00 +0000 (Fri, 05 Apr 2019)");

  script_cve_id("CVE-2019-3871");

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

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

  script_name("PowerDNS Authoritative Server RESTful Vulnerability (2019-03)");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("General");
  script_dependencies("gb_powerdns_dns_detect.nasl");
  script_mandatory_keys("powerdns/authoritative_server/detected");

  script_tag(name:"summary", value:"An issue has been found in PowerDNS Authoritative Server when
  the HTTP remote backend is used in RESTful mode (without post=1 set), allowing a remote user to
  cause the HTTP backend to connect to an attacker-specified host instead of the configured one, via
  a crafted DNS query. This can be used to cause a denial of service (DoS) by preventing the remote
  backend from getting a response, content spoofing if the attacker can time its own query so that
  subsequent queries will use an attacker-controlled HTTP server instead of the configured one, and
  possibly information disclosure if the Authoritative Server has access to internal servers.");

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

  script_tag(name:"affected", value:"PowerDNS Authoritative Server up to and including 4.1.6.");

  script_tag(name:"solution", value:"Update to version 4.0.7, 4.1.7 or later.");

  script_xref(name:"URL", value:"https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2019-03.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: "4.0.7")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.0.7");
  security_message(data: report, port: port, proto: proto);
  exit(0);
}

if (version_in_range(version: version, test_version: "4.1", test_version2: "4.1.6")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.1.7");
  security_message(data: report, port: port, proto: proto);
  exit(0);
}

exit(99);