Siemens KTK, SIDOOR, SIMATIC, and SINAMICS Uncontrolled Resource Consumption (CVE-2019-19300)

##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(500363);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");

  script_cve_id("CVE-2019-19300");

  script_name(english:"Siemens KTK, SIDOOR, SIMATIC, and SINAMICS Uncontrolled Resource Consumption (CVE-2019-19300)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A vulnerability exists in affected products that could allow remote 
attackers to affect the availability of the devices under certain conditions. 

The underlying TCP stack can be forced to make very computation expensive calls 
for every incoming packet which can lead to a Denial-of-Service. 

Siemens has released new versions for several affected products and recommends 
to update to the latest versions. Siemens is preparing further fix versions and 
recommends countermeasures for products where fixes are not, or not yet available. 

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://cert-portal.siemens.com/productcert/pdf/ssa-593272.pdf");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-20-105-08");
  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.

Siemens recommends applying updates if available:

- SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants): Update to v2.1.7
- SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants): Update to v20.8
- SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants): Update to v2.8 
- SIMATIC S7-1500 Software Controller: Update to v20.8
- SIMATIC S7-1200 CPU family (incl. SIPLUS variants): Update to v4.5.2 or later

- SIMATIC S7-410 CPU family (incl. SIPLUS variants): Update to v10.1.1 or later. 
    - Users should disable the ethernet ports on the CPU and use a communication module (like CP) for communication
instead

Siemens has not identified any specific mitigations or workarounds and recommends following their general security
recommendations. As a general security measure, Siemens strongly recommends protecting network access to devices with
appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring
the environment according to the Siemens operational guidelines for Industrial Security and following the
recommendations in the product manuals.

For additional information, users can refer to Siemens Security Advisory SSA-593272 in HTML or CSAF formats.");
  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-2019-19300");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(400);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/14");
  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:siemens:simatic_et200ecopn_firmware:5.1.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200ecopn_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200ecopn_firmware:5.1.3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200mp_im155-5_pn_hf_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200sp_im155-6_mf_hf_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200sp_im155-6_pn_ha_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200sp_im155-6_pn_hf_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200sp_im155-6_pn%2f2_hf_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200sp_im155-6_pn%2f3_hf_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200pro_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et200s_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc2_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_s7-300_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_s7-400_h_v6_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_s7-400_pn%2fdp_v7_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_s7-410_v8_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_s7-410_v10_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_s7-1200_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:siplus_s7-1500_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_tdc_cp51m1_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_tdc_cpu555_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/Siemens");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Siemens');

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

var vuln_cpes = {
    "cpe:/o:siemens:simatic_et200ecopn_firmware:5.1.2" :
        {"versionStartIncluding" : "5.1.1", "versionEndExcluding" : "5.1.2", "family" : "ET200", "orderNumbers" : ["6ES7144-6JF00-0BB0", "6ES7141-6BG00-0BB0", "6ES7141-6BH00-0BB0", "6ES7142-6BG00-0BB0", "6ES7142-6BR00-0BB0"]},
    "cpe:/o:siemens:simatic_et200ecopn_firmware" :
        {"versionStartIncluding" : "5.1.1", "family" : "ET200", "orderNumbers" : ["6ES7148-6JE00-0BB0", "6ES7148-6JG00-0BB0", "6ES7148-6JJ00-0BB0"]},
    "cpe:/o:siemens:simatic_et200ecopn_firmware:5.1.3" :
        {"versionStartIncluding" : "5.1.1", "versionEndExcluding" : "5.1.3", "family" : "ET200", "orderNumbers" : ["6ES7143-6BH00-0BB0"]},
    "cpe:/o:siemens:simatic_et200mp_im155-5_pn_hf_firmware" :
        {"versionStartIncluding" : "4.2", "family" : "ET200"},
    "cpe:/o:siemens:simatic_et200sp_im155-6_mf_hf_firmware" :
        {"family" : "ET200SP"},
    "cpe:/o:siemens:simatic_et200sp_im155-6_pn_ha_firmware" :
        {"family" : "ET200SP"},
    "cpe:/o:siemens:simatic_et200sp_im155-6_pn_hf_firmware" :
        {"versionStartIncluding" : "4.2", "family" : "ET200SP"},
    "cpe:/o:siemens:simatic_et200sp_im155-6_pn%2f2_hf_firmware" :
        {"versionStartIncluding" : "4.2", "family" : "ET200SP"},
    "cpe:/o:siemens:simatic_et200sp_im155-6_pn%2f3_hf_firmware" :
        {"versionStartIncluding" : "4.2", "family" : "ET200SP"},
    "cpe:/o:siemens:simatic_et200pro_firmware" :
        {"family" : "ET200", "orderNumbers" : ["6ES7154-8AB01-0AB0", "6ES7154-8FB01-0AB0", "6ES7154-8FX00-0AB0"]} ,
    "cpe:/o:siemens:simatic_et200s_firmware" :
        {"family" : "ET200", "orderNumbers" : ["6ES7151-8AB01-0AB0", "6ES7151-8FB01-0AB0", "6AG1151-8AB01-7AB0", "6AG1151-8FB01-2AB0"]},
    "cpe:/o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc2_firmware" :
        {"versionEndExcluding" : "2.0", "family" : "ET200SP"},
    "cpe:/o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc_firmware" :
        {"versionEndExcluding" : "2.0", "family" : "ET200SP"},
    "cpe:/o:siemens:simatic_s7-300_firmware" :
        {"family" : "S7300", "orderNumbers" : ["6ES7314-6EH04-0AB0","6ES7314-6EH04-0AB0","6ES7315-2EH14-0AB0","6ES7315-2EH14-0AB0","6ES7315-2FJ14-0AB0","6ES7315-2FJ14-0AB0","6ES7315-7TJ10-0AB0","6ES7315-7TJ10-0AB0","6ES7317-2EK14-0AB0","6ES7317-2EK14-0AB0","6ES7317-2FK14-0AB0","6ES7317-2FK14-0AB0","6ES7317-7TK10-0AB0","6ES7317-7TK10-0AB0","6ES7317-7UL10-0AB0","6ES7317-7UL10-0AB0","6ES7318-3EL01-0AB0","6ES7318-3EL01-0AB0","6ES7318-3FL01-0AB0","6ES7318-3FL01-0AB0","6AG1314-6EH04-7AB0","6AG1314-6EH04-7AB0","6AG1315-2EH14-7AB0","6AG1315-2EH14-7AB0","6AG1315-2FJ14-2AB0","6AG1315-2FJ14-2AB0","6AG1317-2EK14-7AB0","6AG1317-2EK14-7AB0","6AG1317-2FK14-2AB0","6AG1317-2FK14-2AB0"]},
    "cpe:/o:siemens:simatic_s7-400_h_v6_firmware" :
        {"versionStartIncluding" : "v6.0", "versionEndIncluding" : "v6.x", "family" : "S7400"},
    "cpe:/o:siemens:simatic_s7-400_pn%2fdp_v7_firmware" :
        {"versionStartIncluding" : "v7.0", "versionEndIncluding" : "v7.x", "family" : "S7400"},
    "cpe:/o:siemens:simatic_s7-410_v8_firmware" :
        {"versionStartIncluding" : "v8.0", "versionEndIncluding" : "v8.x", "family" : "S7400"},
    "cpe:/o:siemens:simatic_s7-410_v10_firmware" :
        {"versionStartIncluding" : "v10.0", "versionEndIncluding" : "v10.x", "family" : "S7400"},
    "cpe:/o:siemens:siplus_s7-1200_firmware" :
        {"versionEndExcluding" : "4.5.2", "family" : "S71200"},
    "cpe:/o:siemens:siplus_s7-1500_firmware" :
        {"versionEndExcluding" : "2.8", "family" : "S71500"},
    "cpe:/o:siemens:simatic_tdc_cp51m1_firmware" :
        {"family" : "TDCCP51m1"},
    "cpe:/o:siemens:simatic_tdc_cpu555_firmware" :
        {"family" : "TDCCPU555"}
};

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