Siemens SIMATIC CP Cleartext Storage of Sensitive Information (CVE-2021-33716)

medium Tenable OT Security Plugin ID 501102

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in SIMATIC CP 1543-1 (incl. SIPLUS variants) (All versions < V3.0), SIMATIC CP 1545-1 (All versions < V1.1). An attacker with access to the subnet of the affected device could retrieve sensitive information stored in cleartext.

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 applying updates where applicable:

- SIMATIC CP 1545-1: Update to v1.1 or later

For SIMATIC CP 1543-1 (incl. SIPLUS variants), Siemens recommends affected users update to v3.0 or later and migrate the TIA Portal engineering project to v17. After migrating the project successfully, compilation and download to the device is required. See this product’s Siemens Product Support entry for more information.

For SIMATIC CP 1545-1, Siemens has not identified any additional specific workarounds or mitigations.

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 about this issue, please see Siemens Security Advisory SSA-535997

Plugin Details

Severity: Medium

ID: 501102

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 5/2/2023

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.4

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

CVSS Score Source: CVE-2021-33716

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/o:siemens:simatic_cp_1543-1_firmware, cpe:/o:siemens:simatic_cp_1545-1_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 9/14/2021

Vulnerability Publication Date: 9/14/2021

Reference Information

CVE: CVE-2021-33716

CWE: 312

Detections

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