Siemens SICAM A8000 Use of Hard-Coded Credentials (CVE-2021-45033)

high Tenable OT Security Plugin ID 501075

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in CP-8000 MASTER MODULE WITH I/O
-25/+70C (All versions < V16.20), CP-8000 MASTER MODULE WITH I/O
-40/+70C (All versions < V16.20), CP-8021 MASTER MODULE (All versions < V16.20), CP-8022 MASTER MODULE WITH GPRS (All versions < V16.20). An undocumented debug port uses hard-coded default credentials. If this port is enabled by a privileged user, an attacker aware of the credentials could access an administrative debug shell on the affected device.

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 v16.20 or later.

As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends users configure the environment according to Siemens’ operational guidelines for Industrial Security and follow the recommendations in the product manuals.

Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

For more information about these vulnerabilities, see Siemens’ security advisory SSA-324998

Plugin Details

Severity: High

ID: 501075

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 4/20/2023

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2021-45033

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/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:/o:siemens:cp-8000_master_module_with_i%2fo_-25%2f%2b70_firmware, cpe:/o:siemens:cp-8000_master_module_with_i%2fo_-40%2f%2b70_firmware, cpe:/o:siemens:cp-8021_master_module_firmware, cpe:/o:siemens:cp-8022_master_module_with_gprs_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 1/11/2022

Vulnerability Publication Date: 1/11/2022

Reference Information

CVE: CVE-2021-45033

CWE: 798

Detections

Analytics