Siemens InsydeH2O Inclusion of Functionality from Untrusted Control Sphere (CVE-2021-33626)

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

include('compat.inc');

if (description)
{
  script_id(501714);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/27");

  script_cve_id("CVE-2021-33626");

  script_name(english:"Siemens InsydeH2O Inclusion of Functionality from Untrusted Control Sphere (CVE-2021-33626)");

  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 SMM (System Management Mode) branch that
registers a SWSMI handler that does not sufficiently check or validate
the allocated buffer pointer(QWORD values for CommBuffer). This can be
used by an attacker to corrupt data in SMRAM memory and even lead to
arbitrary code execution.

Insyde BIOS is typically used in RUGGEDCOM APE products 
and some SIMATIC devices. Please refer to the vendor advisory for a 
precise list of models concerned.

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.insyde.com/security-pledge/SA-2021001");
  script_set_attribute(attribute:"see_also", value:"https://www.insyde.com/security-pledge");
  script_set_attribute(attribute:"see_also", value:"https://security.netapp.com/advisory/ntap-20220216-0006/");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-2021-33626");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(829);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/10/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/10/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/26");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:insyde:insydeh2o:5.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:insyde:insydeh2o:5.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:insyde:insydeh2o:5.3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:insyde:insydeh2o:5.4");
  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) 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:insyde:insydeh2o:5.3" :
        {"versionEndExcluding" : "5.35.25", "versionStartIncluding" : "5.3", "family" : "APE1808"},
    "cpe:/o:insyde:insydeh2o:5.2" :
        {"versionEndExcluding" : "5.26.25", "versionStartIncluding" : "5.2", "family" : "APE1808"},
    "cpe:/o:insyde:insydeh2o:5.1" :
        {"versionEndExcluding" : "5.16.25", "versionStartIncluding" : "5.1", "family" : "APE1808"},
    "cpe:/o:insyde:insydeh2o:5.4" :
        {"versionEndExcluding" : "5.43.25", "versionStartIncluding" : "5.4", "family" : "APE1808"}
};

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