Denial of Service Vulnerability in Siemens SIMATIC CP 343-1 and CP 443-1 Products
CVE-2021-33737

7.5HIGH

Key Information:

Vendor
Siemens
Status
Simatic Cp 343-1 (incl. Siplus Variants)
Simatic Cp 343-1 Advanced (incl. Siplus Variants)
Simatic Cp 343-1 Erpc
Simatic Cp 343-1 Lean (incl. Siplus Variants)
Vendor
CVE Published:
14 September 2021

Summary

A security flaw exists in Siemens SIMATIC CP 343-1 and CP 443-1 products that may be exploited by sending a specially crafted packet to port 102/tcp. This attack can lead to a denial of service condition, requiring a restart of the affected devices to restore normal functionality. It affects multiple versions of SIMATIC CP 343-1, SIMATIC CP 443-1, and their various SIPLUS variants.

Affected Version(s)

SIMATIC CP 343-1 (incl. SIPLUS variants) All versions

SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) All versions

SIMATIC CP 343-1 ERPC All versions

References

https://cert-portal.siemens.com/productcert/pdf/ssa-54923...

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

.