Siemens Desigo PXC and DXR Devices Uncontrolled Resource Consumption (CVE-2022-24040)

medium Tenable OT Security Plugin ID 500785

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.142.5-22), Desigo PXC3 (All versions < V01.21.142.4-18), Desigo PXC4 (All versions < V02.20.142.10-10884), Desigo PXC5 (All versions < V02.20.142.10-10884). The web application fails to enforce an upper bound to the cost factor of the PBKDF2 derived key during the creation or update of an account. An attacker with the user profile access privilege could cause a denial of service (DoS) condition through CPU consumption by setting a PBKDF2 derived key with a remarkably high cost effort and then attempting a login to the so-modified account.

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 recommends updating to the latest software version:

- Desigo DXR2: Update to v01.21.142.5-22 or later
- Desigo PXC3: Update to v01.21.142.4-18 or later
- Desigo PXC4: Update to v02.20.142.10-10884 or later
- Desigo PXC5: Update to v02.20.142.10-10884 or later

Contact Siemens for update information.

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 the recommendations in the product manuals.

For additional information, please refer to Siemens Security Advisory SSA-626968

For additional information, please refer to Siemens Security Advisory SSA-662649

Plugin Details

Severity: Medium

ID: 500785

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 1/25/2023

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2022-24040

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/o:siemens:desigo_dxr2_firmware, cpe:/o:siemens:desigo_pxc3_firmware, cpe:/o:siemens:desigo_pxc4_firmware, cpe:/o:siemens:desigo_pxc5_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 5/10/2022

Vulnerability Publication Date: 5/10/2022

Reference Information

CVE: CVE-2022-24040

CWE: 400

Detections

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