PowerDNS Recursor File Injection Vulnerability (2017-06)

# 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:recursor";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140544");
  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:"3.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N");
  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-2017-15093");

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

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

  script_name("PowerDNS Recursor File Injection Vulnerability (2017-06)");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("General");
  script_dependencies("gb_powerdns_dns_detect.nasl");
  script_mandatory_keys("powerdns/recursor/detected");

  script_tag(name:"summary", value:"PowerDNS Recursor is prone to a configuration file injection
  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 of PowerDNS Recursor during a
  source code audit by Nixu. When api-config-dir is set to a non-empty value, which is not the case
  by default, the API allows an authorized user to update the Recursor's ACL by adding and removing
  netmasks, and to configure forward zones. It was discovered that the new netmask and IP addresses
  of forwarded zones were not sufficiently validated, allowing an authenticated user to inject new
  configuration directives into the Recursor's configuration.");

  script_tag(name:"affected", value:"PowerDNS Recursor up to and including version 4.0.6.");

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

  script_xref(name:"URL", value:"https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2017-06.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);
}

exit(99);