Siemens InsydeH2O Time-of-check Time-of-use Race Condition (CVE-2022-32477)

high Tenable OT Security Plugin ID 501732

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the FvbServicesRuntimeDxe 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.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 501732

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 9/26/2023

Updated: 4/22/2024

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-2022-32477

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:5.5, cpe:/a:insyde:insydeh2o:5.0, cpe:/a:insyde:insydeh2o:5.4, 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-2022-32477

CWE: 367

Detections

Analytics