Schneider Electric Modicon Controllers Improper Check For Unusual or Exceptional Conditions (CVE-2019-6857)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(500347);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");

  script_cve_id("CVE-2019-6857");

  script_name(english:"Schneider Electric Modicon Controllers Improper Check For Unusual or Exceptional Conditions (CVE-2019-6857)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340,
Modicon Quantum, Modicon Premium (see security notification for specific versions) which could cause a Denial of Service
of the controller when reading specific memory blocks using Modbus TCP.  

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.se.com/ww/en/download/document/SEVD-2019-344-01");
  script_set_attribute(attribute:"see_also", value:"https://www.us-cert.gov/ics/advisories/icsa-20-016-01");
  script_set_attribute(attribute:"solution", value:
"The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original
can be found at CISA.gov.

Schneider Electric has developed the following mitigations: Specific Modicon M580 firmware v3.10 is available at: 

- BMEP584040
- BMEH584040 and C
- BMEP586040 and C
- BMEH586040 and C
- BMEP581020 and H
- BMEP582020 and H
- BMEP582040 and H
- BMEP583020
- BMEP583040
- BMEP584020
- BMEP585040 and C
- BMEH582040 and C
- BMEP584040S
- BMEH584040S
- BMEH586040S
- BMEP582040S

Modicon M340 firmware v3.20 is available at:

- BMXP3420302 and CL and H
- BMXP342020 and H
- BMXP342000
- BMXP341000 and H
- BMXP3420102 and CL
- BMXP3420302

Modicon Premium v3.20 firmware is available by contacting Schneider Electric customer support. Modicon Quantum firmware
v3.60 is available at:");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/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-2019-6857");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(754);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/01/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/07");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:schneider-electric:modicon_m580_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:schneider-electric:modicon_m340_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:schneider-electric:modicon_premium_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:schneider-electric:modicon_quantum_firmware");
  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) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Schneider');

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

var vuln_cpes = {
    "cpe:/o:schneider-electric:modicon_m580_series_firmware" :
        {"versionEndExcluding" : "2.80", "family" : "ModiconM580"},
    "cpe:/o:schneider-electric:modicon_m340_series_firmware" :
        {"versionEndExcluding" : "3.01", "family" : "ModiconM340"},
    "cpe:/o:schneider-electric:modicon_premium_firmware" :
        {"versionEndExcluding" : "3.20", "family" : "Premium"},
    "cpe:/o:schneider-electric:modicon_quantum_firmware" :
        {"versionEndExcluding" : "3.52", "family" : "QuantumUnity"}
};

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