PowerDNS Recursor File Injection Vulnerability

# 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("2023-07-25T05:05:58+0000");
  script_tag(name:"last_modification", value:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
  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");

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

  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 4.0.6, 3.7.4.");

  script_tag(name:"solution", value:"Upgrade 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);