Denial-of-Service Vulnerability in Siemens SIMATIC S7-400 Series
CVE-2021-40368

7.5HIGH

Key Information:

Vendor

Siemens
Status
Simatic S7-400 Cpu 412-1 Dp V7
Simatic S7-400 Cpu 412-2 Dp V7
Simatic S7-400 Cpu 412-2 Pn/dp V7
Simatic S7-400 Cpu 414-2 Dp V7
Vendor
CVE Published:
12 April 2022

What is CVE-2021-40368?

A vulnerability has been found in the Siemens SIMATIC S7-400 product line that allows an attacker to send specially crafted packets to port 102/tcp. This improper handling of packets could lead to a Denial-of-Service situation, requiring a manual restart of the affected devices to restore normal operation. Users of the affected products are encouraged to implement security measures to mitigate potential disruptions.

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Deploy the Patch

Affected Version(s)

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

References

https://cert-portal.siemens.com/productcert/pdf/ssa-55754...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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