Detections
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Siemens InsydeH2O Exposure of Sensitive Information to an Unauthorized Actor (CVE-2021-43613)

medium Tenable OT Security Plugin ID 503052

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An issue was discovered in Insyde InsydeH2O 5.x, affecting SysPasswordDxe that exposes user and administrator password hashes in runtime UEFI variables, leading to escalation of privilege.

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

http://www.nessus.org/u?615a232f

https://www.insyde.com/security-pledge/sa-2022027/

Plugin Details

Severity: Medium

ID: 503052

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 3/12/2025

Updated: 3/12/2025

Supported Sensors: Tenable OT Security

Risk Information

CVSS v3

Risk Factor: Medium

Base Score: 5.2

Temporal Score: 4.7

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

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

Vulnerability Information

CPE: cpe:/o:insyde:insydeh2o:5.3, cpe:/o:insyde:insydeh2o:5.2, cpe:/o:insyde:insydeh2o:5.4, cpe:/o:insyde:insydeh2o:5.1, cpe:/o:insyde:insydeh2o:5.5

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 2/21/2022

Vulnerability Publication Date: 2/21/2022

Reference Information

CVE: CVE-2021-43613

CWE: 200