Denial of Service Vulnerability in Siemens SIMATIC MV540 and MV550 Series
CVE-2023-35921

7.5HIGH

Key Information:

Vendor

Siemens
Status
Simatic Mv540 H
Simatic Mv540 S
Simatic Mv550 H
Simatic Mv550 S
Vendor
CVE Published:
11 July 2023

What is CVE-2023-35921?

A vulnerability has been discovered in the Siemens SIMATIC MV540 and MV550 series devices, specifically affecting all versions prior to V3.3.4. These devices fail to properly handle specially crafted Ethernet frames, which allows an unauthenticated remote attacker to trigger a denial of service condition. As a result, the impacted devices may require manual restarting to restore normal functionality. Users of these products are advised to upgrade to the latest version to mitigate this risk.

Affected Version(s)

SIMATIC MV540 H All versions < V3.3.4

SIMATIC MV540 S All versions < V3.3.4

SIMATIC MV550 H All versions < V3.3.4

References

https://cert-portal.siemens.com/productcert/pdf/ssa-56132...

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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CVE-2023-35921 : Denial of Service Vulnerability in Siemens SIMATIC MV540 and MV550 Series