Denial-of-Service Vulnerability in SIPROTEC 5 Relays by Siemens
CVE-2021-33720

7.5HIGH

Key Information:

Vendor
Siemens
Status
Siprotec 5 Relays With Cpu Variants Cp050
Siprotec 5 Relays With Cpu Variants Cp100
Siprotec 5 Relays With Cpu Variants Cp300
Vendor
CVE Published:
14 September 2021

Summary

A vulnerability has been detected in Siemens SIPROTEC 5 relays across specific CPU variants, which allows an attacker to send specially crafted packets to port 4443/tcp. This can potentially lead to a Denial-of-Service condition, disrupting the functionalities of the affected devices. Users of SIPROTEC 5 relays with CPU variants CP050, CP100, and CP300 should ensure their software is updated to version V8.80 or later to mitigate this risk.

Affected Version(s)

SIPROTEC 5 relays with CPU variants CP050 All versions < V8.80

SIPROTEC 5 relays with CPU variants CP100 All versions < V8.80

SIPROTEC 5 relays with CPU variants CP300 All versions < V8.80

References

https://cert-portal.siemens.com/productcert/pdf/ssa-84798...
x_refsource_MISC

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

.