Siemens Simantic S7-1500 CPU family Use After Free (CVE-2023-46156)

high Tenable OT Security Plugin ID 501837

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a denial of service condition. A restart is needed to restore normal operations.

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

For the following devices, Update to V3.1.0 or later version:

- SIMATIC Drive Controller CPU 1504D TF (6ES7615-4DF10-0AB0)
- SIMATIC Drive Controller CPU 1507D TF (6ES7615-7DF10-0AB0)

For the following devices, limit access to port 102/TCP to trusted users and systems only:

- SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)
- SIMATIC S7-1500 CPU 1510SP F-1 PN (6ES7510-1SJ00-0AB0)
- SIMATIC S7-1500 CPU 1510SP F-1 PN (6ES7510-1SJ01-0AB0)
- SIMATIC S7-1500 CPU 1510SP-1 PN (6ES7510-1DJ00-0AB0)
- SIMATIC S7-1500 CPU 1510SP-1 PN (6ES7510-1DJ01-0AB0)
- SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK00-0AB0)
- SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK01-0AB0)
- SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK02-0AB0)
- SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CK00-0AB0)
- SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CK01-0AB0)
- SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK00-0AB0)
- SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK01-0AB0)
- SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK02-0AB0)
- SIMATIC S7-1500 CPU 1511T-1 PN (6ES7511-1TK01-0AB0)
- SIMATIC S7-1500 CPU 1511TF-1 PN (6ES7511-1UK01-0AB0)
- SIMATIC S7-1500 CPU 1512C-1 PN (6ES7512-1CK00-0AB0)
- SIMATIC S7-1500 CPU 1512C-1 PN (6ES7512-1CK01-0AB0)
- SIMATIC S7-1500 CPU 1512SP F-1 PN (6ES7512-1SK00-0AB0)
- SIMATIC S7-1500 CPU 1512SP F-1 PN (6ES7512-1SK01-0AB0)
- SIMATIC S7-1500 CPU 1512SP-1 PN (6ES7512-1DK00-0AB0)
- SIMATIC S7-1500 CPU 1512SP-1 PN (6ES7512-1DK01-0AB0)
- SIMATIC S7-1500 CPU 1513-1 PN (6ES7513-1AL00-0AB0)
- SIMATIC S7-1500 CPU 1513-1 PN (6ES7513-1AL01-0AB0)
- SIMATIC S7-1500 CPU 1513-1 PN (6ES7513-1AL02-0AB0)
- SIMATIC S7-1500 CPU 1513F-1 PN (6ES7513-1FL00-0AB0)
- SIMATIC S7-1500 CPU 1513F-1 PN (6ES7513-1FL01-0AB0)
- SIMATIC S7-1500 CPU 1513F-1 PN (6ES7513-1FL02-0AB0)
- SIMATIC S7-1500 CPU 1513R-1 PN (6ES7513-1RL00-0AB0)
- SIMATIC S7-1500 CPU 1513R-1 PN (6ES7513-1RM03-0AB0)
- SIMATIC S7-1500 CPU 1515-2 PN (6ES7515-2AM00-0AB0)
- SIMATIC S7-1500 CPU 1515-2 PN (6ES7515-2AM01-0AB0)
- SIMATIC S7-1500 CPU 1515-2 PN (6ES7515-2AM02-0AB0)
- SIMATIC S7-1500 CPU 1515F-2 PN (6ES7515-2FM00-0AB0)
- SIMATIC S7-1500 CPU 1515F-2 PN (6ES7515-2FM01-0AB0)
- SIMATIC S7-1500 CPU 1515F-2 PN (6ES7515-2FM02-0AB0)
- SIMATIC S7-1500 CPU 1515R-2 PN (6ES7515-2RM00-0AB0)
- SIMATIC S7-1500 CPU 1515R-2 PN (6ES7515-2RN03-0AB0)
- SIMATIC S7-1500 CPU 1515T-2 PN (6ES7515-2TM01-0AB0)
- SIMATIC S7-1500 CPU 1515TF-2 PN (6ES7515-2UM01-0AB0)
- SIMATIC S7-1500 CPU 1516-3 PN/DP (6ES7516-3AN00-0AB0)
- SIMATIC S7-1500 CPU 1516-3 PN/DP (6ES7516-3AN01-0AB0)
- SIMATIC S7-1500 CPU 1516-3 PN/DP (6ES7516-3AN02-0AB0)
- SIMATIC S7-1500 CPU 1516F-3 PN/DP (6ES7516-3FN00-0AB0)
- SIMATIC S7-1500 CPU 1516F-3 PN/DP (6ES7516-3FN01-0AB0)
- SIMATIC S7-1500 CPU 1516F-3 PN/DP (6ES7516-3FN02-0AB0)
- SIMATIC S7-1500 CPU 1517H-3 PN (6ES7517-3HP00-0AB0)
- SIMATIC S7-1500 CPU 1518HF-4 PN (6ES7518-4JP00-0AB0)
- SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK (6ES7518-4AP00-3AB0)
- SIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODK (6ES7518-4FP00-3AB0)
- SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN (6ES7513-2GL00-0AB0)
- SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN (6ES7513-2PL00-0AB0)
- SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN (6ES7516-2GN00-0AB0)
- SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN (6ES7516-2PN00-0AB0)
- SIMATIC S7-1500 Software Controller
- SIPLUS ET 200SP CPU 1510SP F-1 PN (6AG1510-1SJ01-2AB0)
- SIPLUS ET 200SP CPU 1510SP F-1 PN RAIL (6AG2510-1SJ01-1AB0)
- SIPLUS ET 200SP CPU 1510SP-1 PN (6AG1510-1DJ01-2AB0)
- SIPLUS ET 200SP CPU 1510SP-1 PN (6AG1510-1DJ01-7AB0)
- SIPLUS ET 200SP CPU 1510SP-1 PN RAIL (6AG2510-1DJ01-1AB0)
- SIPLUS ET 200SP CPU 1510SP-1 PN RAIL (6AG2510-1DJ01-4AB0)
- SIPLUS ET 200SP CPU 1512SP F-1 PN (6AG1512-1SK00-2AB0)
- SIPLUS ET 200SP CPU 1512SP F-1 PN (6AG1512-1SK01-2AB0)
- SIPLUS ET 200SP CPU 1512SP F-1 PN (6AG1512-1SK01-7AB0)
- SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL (6AG2512-1SK01-1AB0)
- SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL (6AG2512-1SK01-4AB0)
- SIPLUS ET 200SP CPU 1512SP-1 PN (6AG1512-1DK01-2AB0)
- SIPLUS ET 200SP CPU 1512SP-1 PN (6AG1512-1DK01-7AB0)
- SIPLUS ET 200SP CPU 1512SP-1 PN RAIL (6AG2512-1DK01-1AB0)
- SIPLUS ET 200SP CPU 1512SP-1 PN RAIL (6AG2512-1DK01-4AB0)
- SIPLUS S7-1500 CPU 1511-1 PN (6AG1511-1AK00-2AB0)
- SIPLUS S7-1500 CPU 1511-1 PN (6AG1511-1AK01-2AB0)
- SIPLUS S7-1500 CPU 1511-1 PN (6AG1511-1AK01-7AB0)
- SIPLUS S7-1500 CPU 1511-1 PN (6AG1511-1AK02-2AB0)
- SIPLUS S7-1500 CPU 1511-1 PN (6AG1511-1AK02-7AB0)
- SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL (6AG2511-1AK01-1AB0)
- SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL (6AG2511-1AK02-1AB0)
- SIPLUS S7-1500 CPU 1511-1 PN TX RAIL (6AG2511-1AK01-4AB0)
- SIPLUS S7-1500 CPU 1511-1 PN TX RAIL (6AG2511-1AK02-4AB0)
- SIPLUS S7-1500 CPU 1511F-1 PN (6AG1511-1FK00-2AB0)
- SIPLUS S7-1500 CPU 1511F-1 PN (6AG1511-1FK01-2AB0)
- SIPLUS S7-1500 CPU 1511F-1 PN (6AG1511-1FK02-2AB0)
- SIPLUS S7-1500 CPU 1513-1 PN (6AG1513-1AL00-2AB0)
- SIPLUS S7-1500 CPU 1513-1 PN (6AG1513-1AL01-2AB0)
- SIPLUS S7-1500 CPU 1513-1 PN (6AG1513-1AL01-7AB0)
- SIPLUS S7-1500 CPU 1513-1 PN (6AG1513-1AL02-2AB0)
- SIPLUS S7-1500 CPU 1513-1 PN (6AG1513-1AL02-7AB0)
- SIPLUS S7-1500 CPU 1513F-1 PN (6AG1513-1FL00-2AB0)
- SIPLUS S7-1500 CPU 1513F-1 PN (6AG1513-1FL01-2AB0)
- SIPLUS S7-1500 CPU 1513F-1 PN (6AG1513-1FL02-2AB0)
- SIPLUS S7-1500 CPU 1515F-2 PN (6AG1515-2FM01-2AB0)
- SIPLUS S7-1500 CPU 1515F-2 PN (6AG1515-2FM02-2AB0)
- SIPLUS S7-1500 CPU 1515F-2 PN RAIL (6AG2515-2FM02-4AB0)
- SIPLUS S7-1500 CPU 1515F-2 PN T2 RAIL (6AG2515-2FM01-2AB0)
- SIPLUS S7-1500 CPU 1515R-2 PN (6AG1515-2RM00-7AB0)
- SIPLUS S7-1500 CPU 1515R-2 PN TX RAIL (6AG2515-2RM00-4AB0)
- SIPLUS S7-1500 CPU 1516-3 PN/DP (6AG1516-3AN00-2AB0)
- SIPLUS S7-1500 CPU 1516-3 PN/DP (6AG1516-3AN00-7AB0)
- SIPLUS S7-1500 CPU 1516-3 PN/DP (6AG1516-3AN01-2AB0)
- SIPLUS S7-1500 CPU 1516-3 PN/DP (6AG1516-3AN01-7AB0)
- SIPLUS S7-1500 CPU 1516-3 PN/DP (6AG1516-3AN02-2AB0)
- SIPLUS S7-1500 CPU 1516-3 PN/DP (6AG1516-3AN02-7AB0)
- SIPLUS S7-1500 CPU 1516-3 PN/DP RAIL (6AG2516-3AN02-4AB0)
- SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAIL (6AG2516-3AN01-4AB0)
- SIPLUS S7-1500 CPU 1516F-3 PN/DP (6AG1516-3FN00-2AB0)
- SIPLUS S7-1500 CPU 1516F-3 PN/DP (6AG1516-3FN01-2AB0)
- SIPLUS S7-1500 CPU 1516F-3 PN/DP (6AG1516-3FN02-2AB0)
- SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL (6AG2516-3FN02-2AB0)
- SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL (6AG2516-3FN02-4AB0)
- SIPLUS S7-1500 CPU 1517H-3 PN (6AG1517-3HP00-4AB0)
- SIPLUS S7-1500 CPU 1518HF-4 PN (6AG1518-4JP00-4AB0)

For the following devices, Update to V3.1.0 or later version:

- SIMATIC S7-1500 CPU 1510SP F-1 PN (6ES7510-1SK03-0AB0)
- SIMATIC S7-1500 CPU 1510SP-1 PN (6ES7510-1DK03-0AB0)
- SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AL03-0AB0)
- SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CL03-0AB0)
- SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FL03-0AB0)
- SIMATIC S7-1500 CPU 1511T-1 PN (6ES7511-1TL03-0AB0)
- SIMATIC S7-1500 CPU 1511TF-1 PN (6ES7511-1UL03-0AB0)
- SIMATIC S7-1500 CPU 1512C-1 PN (6ES7512-1CM03-0AB0)
- SIMATIC S7-1500 CPU 1512SP F-1 PN (6ES7512-1SM03-0AB0)
- SIMATIC S7-1500 CPU 1512SP-1 PN (6ES7512-1DM03-0AB0)
- SIMATIC S7-1500 CPU 1513-1 PN (6ES7513-1AM03-0AB0)
- SIMATIC S7-1500 CPU 1513F-1 PN (6ES7513-1FM03-0AB0)
- SIMATIC S7-1500 CPU 1514SP F-2 PN (6ES7514-2SN03-0AB0)
- SIMATIC S7-1500 CPU 1514SP-2 PN (6ES7514-2DN03-0AB0)
- SIMATIC S7-1500 CPU 1514SPT F-2 PN (6ES7514-2WN03-0AB0)
- SIMATIC S7-1500 CPU 1514SPT-2 PN (6ES7514-2VN03-0AB0)
- SIMATIC S7-1500 CPU 1515-2 PN (6ES7515-2AN03-0AB0)
- SIMATIC S7-1500 CPU 1515F-2 PN (6ES7515-2FN03-0AB0)
- SIMATIC S7-1500 CPU 1515T-2 PN (6ES7515-2TN03-0AB0)
- SIMATIC S7-1500 CPU 1515TF-2 PN (6ES7515-2UN03-0AB0)
- SIMATIC S7-1500 CPU 1516-3 PN/DP (6ES7516-3AP03-0AB0)
- SIMATIC S7-1500 CPU 1516F-3 PN/DP (6ES7516-3FP03-0AB0)
- SIMATIC S7-1500 CPU 1516T-3 PN/DP (6ES7516-3TN00-0AB0)
- SIMATIC S7-1500 CPU 1516TF-3 PN/DP (6ES7516-3UN00-0AB0)
- SIMATIC S7-1500 CPU 1517-3 PN/DP (6ES7517-3AP00-0AB0)
- SIMATIC S7-1500 CPU 1517F-3 PN/DP (6ES7517-3FP00-0AB0)
- SIMATIC S7-1500 CPU 1517F-3 PN/DP (6ES7517-3FP01-0AB0)
- SIMATIC S7-1500 CPU 1517T-3 PN/DP (6ES7517-3TP00-0AB0)
- SIMATIC S7-1500 CPU 1517TF-3 PN/DP (6ES7517-3UP00-0AB0)
- SIMATIC S7-1500 CPU 1518-4 PN/DP (6ES7518-4AP00-0AB0)
- SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
- SIMATIC S7-1500 CPU 1518F-4 PN/DP (6ES7518-4FP00-0AB0)
- SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)
- SIMATIC S7-1500 CPU 1518T-4 PN/DP (6ES7518-4TP00-0AB0)
- SIMATIC S7-1500 CPU 1518TF-4 PN/DP (6ES7518-4UP00-0AB0)
- SIPLUS S7-1500 CPU 1518-4 PN/DP (6AG1518-4AP00-4AB0)
- SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)
- SIPLUS S7-1500 CPU 1518F-4 PN/DP (6AG1518-4FP00-4AB0)

For the following devices, Update to V6.0 or later version:

- SIMATIC S7-PLCSIM Advanced

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-592380 in HTML and CSAF.

Plugin Details

Severity: High

ID: 501837

File Name: tenable_ot_siemens_CVE-2023-46156.nasl

Version: 1.5

Type: remote

Family: Tenable.ot

Published: 12/18/2023

Updated: 2/14/2026

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:N/I:N/A:C

CVSS Score Source: CVE-2023-46156

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:N/I:N/A:H

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

Vulnerability Information

CPE: cpe:/o:siemens:simatic_s7-1500_firmware:3.1.2, cpe:/o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc2_firmware, cpe:/o:siemens:simatic_s7-1500_firmware, cpe:/o:siemens:simatic_s7-1500_firmware:3.1.0, cpe:/o:siemens:simatic_et_200sp_firmware, cpe:/o:siemens:simatic_et_200pro_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 12/12/2023

Vulnerability Publication Date: 12/12/2023

Reference Information

CVE: CVE-2023-46156

CWE: 416

Detections

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