Detections
Analytics

Siemens InsydeH2O Improper Input Validation (CVE-2021-41842)

critical Tenable OT Security Plugin ID 501686

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An issue was discovered in AtaLegacySmm in the kernel 5.0 before 05.08.46, 5.1 before 05.16.46, 5.2 before 05.26.46, 5.3 before 05.35.46, 5.4 before 05.43.46, and 5.5 before 05.51.45 in Insyde InsydeH2O. Code execution can occur because the SMI handler lacks a CommBuffer 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.

Solution

Refer to the vendor advisory.

See Also

https://www.insyde.com/security-pledge

https://security.netapp.com/advisory/ntap-20220223-0002/

Plugin Details

Severity: Critical

ID: 501686

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 9/26/2023

Updated: 9/27/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2021-41842

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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:5.0, cpe:/a:insyde:insydeh2o:5.1, cpe:/a:insyde:insydeh2o:5.2, cpe:/a:insyde:insydeh2o:5.3, cpe:/a:insyde:insydeh2o:5.4, cpe:/a:insyde:insydeh2o:5.5

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 1/6/2022

Vulnerability Publication Date: 1/6/2022

Reference Information

CVE: CVE-2021-41842