MikroTik RouterOS Uncontrolled Recursion (CVE-2019-13955)

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

include('compat.inc');

if (description)
{
  script_id(502057);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/28");

  script_cve_id("CVE-2019-13955");

  script_name(english:"MikroTik RouterOS Uncontrolled Recursion (CVE-2019-13955)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Mikrotik RouterOS before 6.44.5 (long-term release tree) is vulnerable
to stack exhaustion. By sending a crafted HTTP request, an
authenticated remote attacker can crash the HTTP server via recursive
parsing of JSON. Malicious code cannot be injected.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # http://packetstormsecurity.com/files/153733/Mikrotik-RouterOS-Resource-Stack-Exhaustion.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?000600fe");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2019/Jul/20");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-13955");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(674);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/26");
  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:6.44.5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mikrotik:routeros:6.45");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  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:6.44.5" :
        {"versionEndExcluding" : "6.44.5", "family" : "RouterOS"},
    "cpe:/o:mikrotik:routeros:6.45" :
        {"versionEndIncluding" : "6.45", "versionStartIncluding" : "6.45", "family" : "RouterOS"}
};

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