OTPulse

Siemens SWT3000

MonitorCVSS 5.3ICS-CERT ICSA-17-334-01Nov 30, 2017
Siemens
Attack path
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

The Siemens SWT3000 device (TPOP and IEC 61850 firmware versions) contains vulnerabilities related to authentication bypass and input validation (CWE-287, CWE-288, CWE-20). An attacker on the network can bypass authentication mechanisms and access the device without valid credentials, potentially reading sensitive operational data. The device does not properly validate or encrypt communications, allowing remote access with low skill level. Siemens is providing updated firmware through the Customer Support Center.

What this means
What could happen
An attacker with network access to the SWT3000 could intercept and read sensitive data transmitted without encryption. This could expose operational data such as power flow readings, device configurations, or control parameters.
Who's at risk
Utilities operating Siemens SWT3000 devices (protection and control equipment) in power generation, transmission, or distribution networks are affected. This includes substations and power plants using TPOP or IEC 61850 firmware variants.
How it could be exploited
An attacker on the network can send requests directly to the SWT3000 device over the network without authentication. The device accepts and processes these requests, revealing information that should be protected.
Prerequisites
  • Network access to the SWT3000 device on port(s) used by TPOP or IEC 61850 firmware
  • No credentials required
  • Device must be deployed and operational
Remotely exploitableNo authentication requiredLow complexity attackNo patch available currentlyAffects critical power system equipment
Exploitability
Some exploitation risk — EPSS score 2.4%
Affected products (2)
2 EOL
ProductAffected VersionsFix Status
TPOP firmware: All< 01.01.00No fix (EOL)
IEC 61850 firmware: All< 4.29.01No fix (EOL)
Remediation & Mitigation
0/3
Do now
0/1
WORKAROUNDRestrict network access to SWT3000 devices using firewall rules or network segmentation to limit connections to authorized engineering and control stations only
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXContact Siemens Customer Support Center (support.energy@siemens.com) to obtain updated firmware and apply to affected TPOP and IEC 61850 systems
Mitigations - no patch available
0/1
The following products have reached End of Life with no planned fix: TPOP firmware: All, IEC 61850 firmware: All. Apply the following compensating controls:
HARDENINGReview and implement Siemens Operational Guidelines for Industrial Security to harden the operational environment
View full CISA ICS-CERT advisory
API: /api/v1/advisories/83a018c1-1e77-4896-bcda-986702de9eb4

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Siemens SWT3000 | CVSS 5.3 - OTPulse