Missing Authentication for Critical Function

CVE-2025-27256

Summary

Missing Authentication for Critical Function vulnerability in GE Vernova Enervista UR Setup application allows Authentication Bypass due to a missing SSH server authentication. Since the client connection is not authenticated, an attacker may perform a man-in-the-middle attack on the network.

Impact

An attacker may perform a Man-in-the-middle attack on the network in order to steal credentials or forge malicious traffic

Issue Date

March 7, 2025

Affects

This issue affect the GE Vernova EnerVista UR Setup software from version 7.0 to 8.60

CVE Name

CVE-2025-27256

CVSS Details

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

CVSS Score

8.3

Solution

Update the EnerVista UR Setup software to the latest released version

Mitigations

Acknowledgements

Diego Giubertoni of Nozomi Networks

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Research Projects

TRITON

TRITON is the first known cyberattack that directly interacted with a Safety Instrumented System (SIS). Labs reverse engineered the TriStation suite of software and delivered a report and two free tools for security researchers. This research was presented at Black Hat USA 2018.

GreyEnergy

The Labs team reverse engineered the GreyEnergy malicious document (maldoc) that leads to the installation of the malware (backdoor) on a victim’s network. Project outcomes include a report, multiple blogs and two free tools for security researchers.

IEC 62351

IEC Working Group 15 (WG15) is developing technology standards for secure-by-design power systems. Labs contributes to the standards and has demonstrated how they can be used to identify hard-to-detect cyberattacks. Research from this effort was presented at Black Hat USA 2019.

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