Siemens InsydeH2O Time-of-check Time-of-use Race Condition (CVE-2022-32470)

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

include('compat.inc');

if (description)
{
  script_id(501698);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/22");

  script_cve_id("CVE-2022-32470");

  script_name(english:"Siemens InsydeH2O Time-of-check Time-of-use Race Condition (CVE-2022-32470)");

  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 Insyde InsydeH2O with kernel 5.0 through
5.5. DMA attacks on the FwBlockServiceSmm shared buffer used by SMM
and non-SMM code could cause TOCTOU race-condition issues that could
lead to corruption of SMRAM and escalation of privileges. This attack
can be mitigated using IOMMU protection for the ACPI runtime memory
used for the command buffer. This attack can be mitigated by copying
the firmware block services data to SMRAM before checking it.

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-2023002");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:S/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:H/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-2022-32470");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(367);

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/02/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/02/15");
  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:5.0");
  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) 2023-2024 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:/a:insyde:insydeh2o:5.5" :
        {"versionEndExcluding" : "5.5.05.52.27", "versionStartIncluding" : "5.5", "family" : "APE1808"},
    "cpe:/a:insyde:insydeh2o:5.4" :
        {"versionEndExcluding" : "5.4.05.44.27", "versionStartIncluding" : "5.4", "family" : "APE1808"},
    "cpe:/a:insyde:insydeh2o:5.3" :
        {"versionEndExcluding" : "5.3.05.36.27", "versionStartIncluding" : "5.3", "family" : "APE1808"},
    "cpe:/a:insyde:insydeh2o:5.0" :
        {"versionEndExcluding" : "5.2.05.27.27", "versionStartIncluding" : "5.0", "family" : "APE1808"}
};

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