Siemens InsydeH2O Improper Restriction of Operations within the Bounds of a Memory Buffer (CVE-2021-41838)

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

include('compat.inc');

if (description)
{
  script_id(501715);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/27");

  script_cve_id("CVE-2021-41838");

  script_name(english:"Siemens InsydeH2O Improper Restriction of Operations within the Bounds of a Memory Buffer (CVE-2021-41838)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"An issue was discovered in SdHostDriver in the kernel 5.0 through 5.5
in Insyde InsydeH2O. There is an SMM callout that allows an attacker
to access the System Management Mode and execute arbitrary code. This
occurs because of a Numeric Range Comparison Without a Minimum Check.

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");
  script_set_attribute(attribute:"see_also", value:"https://www.insyde.com/security-pledge/SA-2022023");
  script_set_attribute(attribute:"see_also", value:"https://security.netapp.com/advisory/ntap-20220222-0001/");
  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:C/I:C/A:C");
  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:H/UI:N/S:C/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-2021-41838");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(119);

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/02/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/03");
  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:/a:insyde:insydeh2o:5.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:insyde:insydeh2o:5.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:insyde:insydeh2o:5.3");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:insyde:insydeh2o:5.4");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:insyde:insydeh2o:5.5");
  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:/a:insyde:insydeh2o:5.1" :
        {"versionEndExcluding" : "5.16.42", "versionStartIncluding" : "5.1", "family" : "APE1808"},
    "cpe:/a:insyde:insydeh2o:5.2" :
        {"versionEndExcluding" : "5.26.42", "versionStartIncluding" : "5.2", "family" : "APE1808"},
    "cpe:/a:insyde:insydeh2o:5.3" :
        {"versionEndExcluding" : "5.35.42", "versionStartIncluding" : "5.3", "family" : "APE1808"},
    "cpe:/a:insyde:insydeh2o:5.4" :
        {"versionEndExcluding" : "5.43.42", "versionStartIncluding" : "5.4", "family" : "APE1808"},
    "cpe:/a:insyde:insydeh2o:5.5" :
        {"versionEndExcluding" : "5.51.42", "versionStartIncluding" : "5.5", "family" : "APE1808"}
};

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