CVE-2021-40368: Buffer Overflow

Published Apr 12, 2022
·
Updated

A vulnerability has been identified in SIMATIC S7-400 CPU 412-1 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 414-2 DP V7 (All versions), SIMATIC S7-400 CPU 414-3 DP V7 (All versions), SIMATIC S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 414F-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 416-2 DP V7 (All versions), SIMATIC S7-400 CPU 416-3 DP V7 (All versions), SIMATIC S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 416F-2 DP V7 (All versions), SIMATIC S7-400 CPU 416F-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 417-4 DP V7 (All versions), SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants) (All versions < V6.0.10), SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) (All versions < V10.1), SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) (All versions < V8.2.3), SIPLUS S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 V7 (All versions), SIPLUS S7-400 CPU 417-4 V7 (All versions). 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.

Affected Software

8 affected components
Siemens Simatic S7-400h V6 Firmware<6.0.10
Siemens Simatic S7-400h V6
Siemens Simatic S7-400 Pn\/dp V7 Firmware
Siemens Simatic S7-400 Pn\/dp V7
Siemens Simatic S7-410 V8 Firmware
Siemens Simatic S7-410 V8
Siemens Simatic S7-410 V10 Firmware<10.1
Siemens Simatic S7-410 V10

Remediation

Patch Available

https://cert-portal.siemens.com/productcert/pdf/ssa-557541.pdf

Event History

Apr 12, 2022
CVE Published
via MITRE·09:07 AM
Data Sourced
via MITRE·09:07 AM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is CVE-2021-40368?

CVE-2021-40368 is a vulnerability identified in SIMATIC S7-400 CPU 412-1 DP V7 and other versions.

2

What is the severity of CVE-2021-40368?

The severity of CVE-2021-40368 is high with a severity value of 7.5.

3

How does CVE-2021-40368 affect Siemens Simatic S7-400h V6 Firmware?

Siemens Simatic S7-400h V6 Firmware up to version 6.0.10 is affected by CVE-2021-40368.

4

How can I fix CVE-2021-40368?

To fix CVE-2021-40368, it is recommended to update to a version that is not vulnerable.

5

Where can I find more information about CVE-2021-40368?

You can find more information about CVE-2021-40368 in the reference link: https://cert-portal.siemens.com/productcert/pdf/ssa-557541.pdf

Company

Resources

Contact

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