CVE-2021-27426: GE UR family insecure default variable initialization

Q: What is CVE-2021-27426?

CVE-2021-27426 is a vulnerability that affects GE UR IED firmware versions prior to version 8.1x with the “Basic” security variant.

Q: What is the severity of CVE-2021-27426?

CVE-2021-27426 has a severity rating of 9.8, which is classified as critical.

Q: Which software versions are affected by CVE-2021-27426?

GE UR IED firmware versions prior to version 8.1x with the “Basic” security variant are affected by CVE-2021-27426.

Q: How can I fix CVE-2021-27426?

To fix CVE-2021-27426, update your GE UR IED firmware to version 8.1x or later with the “Basic” security variant.

Q: Where can I find more information about CVE-2021-27426?

You can find more information about CVE-2021-27426 on the CISA (Cybersecurity and Infrastructure Security Agency) website and the GE Grid Solutions website.

Published Mar 23, 2022

Updated

GE UR IED firmware versions prior to version 8.1x with “Basic” security variant does not allow the disabling of the “Factory Mode,” which is used for servicing the IED by a “Factory” user.

Affected Software

44 affected components

GE Vulnerabilities related to SSH Support: firmware versions 7.4x to 8.0x (CyberSentry option)

GE Web server vulnerabilities: all firmware versions prior to version 8.1x

GE Protection from unintended firmware upload: all firmware versions prior to 8.1x with basic security option

GE Provisions to disable Factory Mode: all firmware versions prior to 8.1x with basic security option

GE Access to “Last-key pressed” register: all firmware versions prior to 8.1x with basic security option

GE Weakness in UR bootloader binary: all bootloader versions prior to 7.03/7.04

GE Multilin B30 Firmware<8.10

GE Multilin B30

GE Multilin B90 Firmware<8.10

GE Multilin B90

GE Multilin C60 Firmware<8.10

GE Multilin C60

GE Multilin C70 Firmware<8.10

GE Multilin C70

GE Multilin C95 Firmware<8.10

GE Multilin C95

GE Multilin D30 Firmware<8.10

GE Multilin D30

GE Multilin D60 Firmware<8.10

GE Multilin D60

GE Multilin F35 Firmware<8.10

GE Multilin F35

GE Multilin F60 Firmware<8.10

GE Multilin F60

GE Multilin G30 Firmware<8.10

GE Multilin G30

GE Multilin G60 Firmware<8.10

GE Multilin G60

GE Multilin L30 Firmware<8.10

GE Multilin L30

GE Multilin L60 Firmware<8.10

GE Multilin L60

GE Multilin L90 Firmware<8.10

GE Multilin L90

GE Multilin M60 Firmware<8.10

GE Multilin M60

GE Multilin N60 Firmware<8.10

GE Multilin N60

GE Multilin T35 Firmware<8.10

GE Multilin T35

GE Multilin T60 Firmware<8.10

GE Multilin T60

GE Multilin C30 Firmware<8.10

GE Multilin C30

Remediation

Information

GE strongly recommends users with impacted firmware versions update their UR devices to UR firmware Version 8.10, or greater to resolve these vulnerabilities. GE provides additional mitigations and information about these vulnerabilities in GE Publication Number: GES-2021-004 (login required).

Event History

Mar 23, 2022

CVE Published

via MITRE·07:46 PM

Data Sourced

via MITRE·07:46 PM

RemedyDescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

ICSA-21-075-02

Frequently Asked Questions

What is CVE-2021-27426?

CVE-2021-27426 is a vulnerability that affects GE UR IED firmware versions prior to version 8.1x with the “Basic” security variant.

What is the severity of CVE-2021-27426?

CVE-2021-27426 has a severity rating of 9.8, which is classified as critical.

Which software versions are affected by CVE-2021-27426?