Siemens SICAM A8000 Use of Uninitialized Resource (CVE-2023-42797)

high Tenable OT Security Plugin ID 501888

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.20), CP-8050 MASTER MODULE (All versions < CPCI85 V05.20). The network configuration service of affected devices contains a flaw in the conversion of ipv4 addresses that could lead to an uninitialized variable being used in succeeding validation steps.
By uploading specially crafted network configuration, an authenticated remote attacker could be able to inject commands that are executed on the device with root privileges during device startup.

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Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

CP-8031 MASTER MODULE (6MF2803-1AA00):

- Review the list of users that are allowed to modify the network configuration and apply strong passwords.
- Update to CPCI85 V05.20 or later version

CP-8050 MASTER MODULE (6MF2805-0AA00):

- Review the list of users that are allowed to modify the network configuration and apply strong passwords.
- Update to CPCI85 V05.20 or later version

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 see the associated Siemens security advisory SSA-583634 in HTML and CSAF.

Plugin Details

Severity: High

ID: 501888

File Name: tenable_ot_siemens_CVE-2023-42797.nasl

Version: 1.3

Type: remote

Family: Tenable.ot

Published: 1/16/2024

Updated: 2/14/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 6.1

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

CVSS Score Source: CVE-2023-42797

CVSS v3

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/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:sicam_a8000_cp-8050_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 1/9/2024

Vulnerability Publication Date: 1/9/2024

Reference Information

CVE: CVE-2023-42797

CWE: 908

Detections

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