Siemens SCALANCE W1750D Improper Limitation of a Pathname to a Restricted Directory (Path Traversal) (CVE-2021-37735)

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

include('compat.inc');

if (description)
{
  script_id(501059);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/24");

  script_cve_id("CVE-2021-37735");

  script_name(english:"Siemens SCALANCE W1750D Improper Limitation of a Pathname to a Restricted Directory (Path Traversal) (CVE-2021-37735)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A remote denial of service vulnerability was discovered in Aruba
Instant version(s): Aruba Instant 6.5.x.x: 6.5.4.18 and below; Aruba
Instant 8.5.x.x: 8.5.0.10 and below; Aruba Instant 8.6.x.x: 8.6.0.4
and below. Aruba has released patches for Aruba Instant (IAP) that
address this security vulnerability.

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.arubanetworks.com/assets/alert/ARUBA-PSA-2021-017.txt");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-21-315-06");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/pdf/ssa-917476.pdf");
  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 upgrading their products to the latest version:

- SCALANCE W1750D: Update to v8.7.1.3 or later.

- SCALANCE W1750D: Update to v8.7.1.9 or later

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

- Block access to the Aruba Instant Command Line Interface from all untrusted users.
- Block access to the Aruba Instant web-based management interface from all untrusted users.
- Enable the Enhanced PAPI Security feature, where available, to prevent exploitation of these vulnerabilities. For
assistance from the Siemens Technical Assistance Center (TAC), please contact Siemens (login required).
- Block access for Aruba Instant device on Port UDP/8211 from all untrusted users.

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 more information see Siemens Security Advisory SSA-917476 in HTML or CSAF.");
  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:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-37735");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(134);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/10/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/10/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/04/11");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_w1750d_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 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:scalance_w1750d_firmware" :
        {"versionEndExcluding" : "8.7.1.3", "family" : "SCALANCEW"}
};

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