Siemens SICAM A8000 RTUs Protection Mechanism Failure (CVE-2020-28396)

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

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

if (description)
{
  script_id(500432);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");

  script_cve_id("CVE-2020-28396");

  script_name(english:"Siemens SICAM A8000 RTUs Protection Mechanism Failure (CVE-2020-28396)");

  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 SICAM A8000 CP-8000 (All versions < V16), SICAM A8000 CP-8021 (All versions <
V16), SICAM A8000 CP-8022 (All versions < V16). A web server misconfiguration of the affected device can cause insecure
ciphers usage by a users browser. An attacker in a privileged position could decrypt the communication and compromise
confidentiality and integrity of the transmitted information.  

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-415783.pdf");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-20-343-07");
  script_set_attribute(attribute:"see_also", value:"https://www.zerodayinitiative.com/advisories/ZDI-21-062/");
  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 users update to the latest version, v16. Siemens also recommends users configure the browser to
accept only secure ciphers.

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, please refer to Siemens Security Advisory SSA-415783");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/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:L/PR:L/UI:R/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-2020-28396");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(693);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/12/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/12/14");
  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:sicam_a8000_cp-8000_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:sicam_a8000_cp-8021_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:sicam_a8000_cp-8022_firmware");
  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:sicam_a8000_cp-8000_firmware" :
        {"versionEndExcluding" : "16", "family" : "SicamA8000CP800"},
    "cpe:/o:siemens:sicam_a8000_cp-8021_firmware" :
        {"versionEndExcluding" : "16", "family" : "SicamA8000CP802"},
    "cpe:/o:siemens:sicam_a8000_cp-8022_firmware" :
        {"versionEndExcluding" : "16", "family" : "SicamA8000CP802"}
};

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