MikroTik RouterOS Intermediary Vulnerability

# Copyright (C) 2019 Greenbone Networks GmbH
# 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-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/o:mikrotik:routeros";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.142020");
  script_version("2021-09-02T14:01:33+0000");
  script_tag(name:"last_modification", value:"2021-09-02 14:01:33 +0000 (Thu, 02 Sep 2021)");
  script_tag(name:"creation_date", value:"2019-02-21 13:08:45 +0700 (Thu, 21 Feb 2019)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-09 23:49:00 +0000 (Wed, 09 Oct 2019)");

  script_cve_id("CVE-2019-3924");

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

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

  script_name("MikroTik RouterOS Intermediary Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_mikrotik_router_routeros_consolidation.nasl");
  script_mandatory_keys("mikrotik/detected");

  script_tag(name:"summary", value:"MikroTik RouterOS is vulnerable to an intermediary vulnerability. The software
will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use
this vulnerability to bypass the router's firewall or for general network scanning activities.");

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

  script_tag(name:"affected", value:"MikroTik RouterOS prior to version 6.42.12 and 6.43.12.");

  script_tag(name:"solution", value:"Update to version 6.42.1, 6.43.12 or later.");

  script_xref(name:"URL", value:"https://mikrotik.com/download/changelogs/bugfix-release-tree");
  script_xref(name:"URL", value:"https://mikrotik.com/download/changelogs/release-candidate-release-tree");
  script_xref(name:"URL", value:"https://www.tenable.com/security/research/tra-2019-07");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (!version = get_app_version(cpe: CPE, nofork: TRUE))
  exit(0);

if (version_is_less(version: version, test_version: "6.42.12")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.42.12");
  security_message(port: 0, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "6.43", test_version2: "6.43.11")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.43.12");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);