MikroTik RouterOS Uncontrolled Resource Consumption (CVE-2017-8338)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(502069);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/28");

  script_cve_id("CVE-2017-8338");

  script_name(english:"MikroTik RouterOS Uncontrolled Resource Consumption (CVE-2017-8338)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A vulnerability in MikroTik Version 6.38.5 could allow an
unauthenticated remote attacker to exhaust all available CPU via a
flood of UDP packets on port 500 (used for L2TP over IPsec),
preventing the affected router from accepting new connections; all
devices will be disconnected from the router and all logs removed
automatically.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  script_set_attribute(attribute:"see_also", value:"http://seclists.org/fulldisclosure/2017/May/59");
  script_set_attribute(attribute:"see_also", value:"https://cxsecurity.com/issue/WLB-2017050062");
  # https://packetstormsecurity.com/files/142538/MikroTik-RouterBoard-6.38.5-Denial-Of-Service.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dceade04");
  script_set_attribute(attribute:"see_also", value:"https://www.vulnerability-lab.com/get_content.php?id=2064");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-8338");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(400);

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/05/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/02/27");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mikrotik:routeros:6.38.5");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/MikroTik");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/MikroTik');

var asset = tenable_ot::assets::get(vendor:'MikroTik');

var vuln_cpes = {
    "cpe:/o:mikrotik:routeros:6.38.5" :
        {"versionEndIncluding" : "6.38.5", "versionStartIncluding" : "6.38.5", "family" : "RouterOS"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);