Siemens SICAM A8000 Web Server Module Improper Access Control (CVE-2021-46304)

high Tenable OT Security Plugin ID 501071

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), CP-8000 MASTER MODULE WITH I/O -40/+70C (All versions), CP-8021 MASTER MODULE (All versions), CP-8022 MASTER MODULE WITH GPRS (All versions). The component allows to activate a web server module which provides unauthenticated access to its web pages. This could allow an attacker to retrieve debug-level information from the component such as internal network topology or connected systems.

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 provided the following updates to the vulnerabilities for the following products affected:

- CP-8000 MASTER MODULE WITH I/O -25/+70°C (6MF2101-0AB10-0AA0): There is currently no fix available
- CP-8000 MASTER MODULE WITH I/O -40/+70°C (6MF2101-1AB10-0AA0): There is currently no fix available
- CP-8021 MASTER MODULE (6MF2802-1AA00): There is currently no fix available
- CP-8022 MASTER MODULE WITH GPRS (6MF2802-2AA00): There is currently no fix available

Siemens has identified the following workarounds and mitigations for users to reduce risk:

- Operate the affected web server module only when required and apply the security instructions provided in the updated manual.

Siemens recommends users apply General Security Recommendations.

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

For additional information, please refer to Siemens Security Advisory SSA-185638.

Plugin Details

Severity: High

ID: 501071

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: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2021-46304

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/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: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: 8/10/2022

Vulnerability Publication Date: 8/10/2022

Reference Information

CVE: CVE-2021-46304

CWE: 287

Detections

Analytics