MikroTik RouterOS Download of Code Without Integrity Check (CVE-2019-3977)

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

include('compat.inc');

if (description)
{
  script_id(502037);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/28");

  script_cve_id("CVE-2019-3977");

  script_name(english:"MikroTik RouterOS Download of Code Without Integrity Check (CVE-2019-3977)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"RouterOS 6.45.6 Stable, RouterOS 6.44.5 Long-term, and below
insufficiently validate where upgrade packages are download from when
using the autoupgrade feature. Therefore, a remote attacker can trick
the router into upgrading to an older version of RouterOS and
possibly reseting all the system's usernames and passwords.

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:"https://www.tenable.com/security/research/tra-2019-46");
  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:C/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:N/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3977");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(494);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/10/29");
  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");
  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" :
        {"versionEndIncluding" : "6.45.6", "family" : "RouterOS"}
};

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