Siemens InsydeH2O Time-of-check Time-of-use Race Condition (CVE-2022-32471)

high Tenable OT Security Plugin ID 501723

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. The IhisiDxe driver uses the command buffer to pass input and output data. By modifying the command buffer contents with DMA after the input parameters have been checked but before they are used, the IHISI SMM code may be convinced to modify SMRAM or OS, leading to possible data corruption or escalation of privileges.

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.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Siemens has released BIOS update V1.0.212N for the affected products and recommends updating to the latest version.

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage

For more information see the associated Siemens security advisory SSA-957369 in HTML and CSAF.

Plugin Details

Severity: High

ID: 501723

File Name: tenable_ot_siemens_CVE-2022-32471.nasl

Version: 1.3

Type: remote

Family: Tenable.ot

Published: 9/26/2023

Updated: 2/14/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2022-32471

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:insyde:insydeh2o:5.4, cpe:/a:insyde:insydeh2o:5.0, cpe:/a:insyde:insydeh2o:5.5, cpe:/a:insyde:insydeh2o:5.3

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 2/15/2023

Vulnerability Publication Date: 2/15/2023

Reference Information

CVE: CVE-2022-32471

CWE: 367

ICSA: 23-257-04

Detections

Analytics