Siemens LOGO! Channel Accessible By Non-Endpoint (CVE-2017-12735)

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

include('compat.inc');

if (description)
{
  script_id(501675);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");

  script_cve_id("CVE-2017-12735");

  script_name(english:"Siemens LOGO! Channel Accessible By Non-Endpoint (CVE-2017-12735)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS
variants) (All versions < V8.3). An attacker who performs a Man-in-
the-Middle attack between the LOGO! BM and other devices could
potentially decrypt and modify network traffic.

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://www.securityfocus.com/bid/100561");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/pdf/ssa-087240.pdf");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-17-243-02");
  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 provides LOGO!8 BM FS-05 with firmware Version 1.81.2, which fixes the first Insufficiently Protected
Credentials vulnerability.

Siemens recommends users update to v8.3 to mitigate the Man-in-the-Middle vulnerability. 

NOTE: To update, a new hardware version is required.

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

- Configure the environment according to the recommendations in the Siemens user manual.
- Apply cell protection concept.
- Use VPN for protecting network communication between cells.
- Apply defense-in-depth.

As a general security measure, Siemens strongly recommends protecting network access to the devices with appropriate
mechanisms. Siemens advises configuring the environment according to Siemens operational guidelines to run the devices
in a protected IT environment.

For more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens Security
Advisory SSA-087240");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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-2017-12735");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(300);

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/21");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:logo%21_8_bm_firmware");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023-2024 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:logo%21_8_bm_firmware" :
        {"versionEndExcluding" : "8.3", "family" : "LOGO!BM"}
};

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