Remote Code Execution in SIPROTEC 5 Relays by Siemens
CVE-2021-37206

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 identified in the SIPROTEC 5 relays, specifically affecting CPU variants CP050, CP100, and CP300 on pre-version 8.80. The issue arises from improper processing of received webpackets, enabling an unauthenticated remote attacker with network access to exploit the vulnerability and send specially crafted packets. This allows the attacker to force a restart of the affected devices, which may disrupt critical operations. Securing Ethernet interfaces is vital for preventing such exploitation.

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-50074...
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

.