MikroTik RouterOS Intermediary Vulnerability (CVE-2019-3924)

# 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:/o:mikrotik:routeros";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.142020");
  script_version("2025-08-18T05:42:33+0000");
  script_tag(name:"last_modification", value:"2025-08-18 05:42:33 +0000 (Mon, 18 Aug 2025)");
  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:3.1/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:"2025-08-15 20:21:44 +0000 (Fri, 15 Aug 2025)");

  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 (CVE-2019-3924)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("General");
  script_dependencies("gb_mikrotik_router_routeros_consolidation.nasl");
  script_mandatory_keys("mikrotik/routeros/detected");

  script_tag(name:"summary", value:"MikroTik RouterOS is prone 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);