CVE-2021-40368

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.32%
Vendor Advisory siemens.com
Affected: Siemens SIMATIC S7-400 CPU 412-1 DP V7
Affected: Siemens SIMATIC S7-400 CPU 412-2 DP V7
Affected: Siemens SIMATIC S7-400 CPU 412-2 PN/DP V7
Affected: Siemens SIMATIC S7-400 CPU 414-2 DP V7
Affected: Siemens SIMATIC S7-400 CPU 414-3 DP V7
Affected: Siemens SIMATIC S7-400 CPU 414-3 PN/DP V7
Affected: Siemens SIMATIC S7-400 CPU 414F-3 PN/DP V7
Affected: Siemens SIMATIC S7-400 CPU 416-2 DP V7
Affected: Siemens SIMATIC S7-400 CPU 416-3 DP V7
Affected: Siemens SIMATIC S7-400 CPU 416-3 PN/DP V7
Affected: Siemens SIMATIC S7-400 CPU 416F-2 DP V7
Affected: Siemens SIMATIC S7-400 CPU 416F-3 PN/DP V7
Affected: Siemens SIMATIC S7-400 CPU 417-4 DP V7
Affected: Siemens SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants)
Affected: Siemens SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants)
Affected: Siemens SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants)
Affected: Siemens SIPLUS S7-400 CPU 414-3 PN/DP V7
Affected: Siemens SIPLUS S7-400 CPU 416-3 PN/DP V7
Affected: Siemens SIPLUS S7-400 CPU 416-3 V7
Affected: Siemens SIPLUS S7-400 CPU 417-4 V7
Published at:
Updated at:

References

Link Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-557541.pdf patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-40368?
CVE-2021-40368 has been scored as a high severity vulnerability.
How to fix CVE-2021-40368?
To fix CVE-2021-40368, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-40368 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-40368 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-40368?
CVE-2021-40368 affects Siemens SIMATIC S7-400 CPU 412-1 DP V7, Siemens SIMATIC S7-400 CPU 412-2 DP V7, Siemens SIMATIC S7-400 CPU 412-2 PN/DP V7, Siemens SIMATIC S7-400 CPU 414-2 DP V7, Siemens SIMATIC S7-400 CPU 414-3 DP V7, Siemens SIMATIC S7-400 CPU 414-3 PN/DP V7, Siemens SIMATIC S7-400 CPU 414F-3 PN/DP V7, Siemens SIMATIC S7-400 CPU 416-2 DP V7, Siemens SIMATIC S7-400 CPU 416-3 DP V7, Siemens SIMATIC S7-400 CPU 416-3 PN/DP V7, Siemens SIMATIC S7-400 CPU 416F-2 DP V7, Siemens SIMATIC S7-400 CPU 416F-3 PN/DP V7, Siemens SIMATIC S7-400 CPU 417-4 DP V7, Siemens SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants), Siemens SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants), Siemens SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants), Siemens SIPLUS S7-400 CPU 414-3 PN/DP V7, Siemens SIPLUS S7-400 CPU 416-3 PN/DP V7, Siemens SIPLUS S7-400 CPU 416-3 V7, Siemens SIPLUS S7-400 CPU 417-4 V7.
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