CVE-2021-27426 is a critical vulnerability in GE UR IED firmware versions prior to 8.1x that utilize the 'Basic' security variant. The vulnerability arises from the inability to disable the 'Factory Mode' configuration, which is intended for servicing the Intelligent Electronic Device (IED) by authorized factory personnel. This oversight could allow unauthorized access and manipulation of the IED, leading to significant operational risks.
With a CVSS score of 9.8, this vulnerability is classified as critical due to its potential impact on confidentiality, integrity, and availability. Attackers may leverage this vulnerability to gain unauthorized access, thereby compromising the system's integrity and availability. Organizations should prioritize patching this vulnerability immediately.
As of now, there is no confirmed public exploit available. However, given the critical nature of the vulnerability, the urgency for organizations to apply updates cannot be overstated. The risk to organizations includes significant operational disruption, potential data loss, and compliance implications.
Organizations utilizing affected GE UR IED firmware must take immediate action to remediate this vulnerability. This includes verifying firmware versions and applying the necessary patches to prevent unauthorized access.
Vulnerability Details
The vulnerability allows an attacker to exploit the IED due to the inability to disable 'Factory Mode.' The affected products include various firmware versions such as multilin_b30, multilin_b90, and others with the same security variant. The flaw is classified under CWE-453, indicating a configuration issue.
The vulnerability was published on March 23, 2022. Its exploitation could lead to a complete compromise of the IED functionalities, making it imperative for organizations to act swiftly.
Technical Analysis
The root cause of this vulnerability is the inadequate configuration management that allows 'Factory Mode' to remain enabled without the ability to disable it. This oversight presents a significant attack vector as it can be accessed over the network with low complexity, requiring no privileges or user interaction from the attacker.
The confidentiality, integrity, and availability impacts are rated as high, indicating that successful exploitation can lead to unauthorized access and operational disruptions.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to the IEDs, which may lead to operational disruptions or even complete control over the devices. Given the critical nature of these devices in infrastructure, the blast radius of a successful attack can be significant, impacting not just the organization but potentially critical services.
Organizations should prioritize remediation based on the critical CVSS score and the potential impact of exploitation. Immediate action is required to ensure the security and integrity of their systems.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include all GE UR IED firmware versions prior to 8.1x for various models, such as multilin_b30, multilin_b90, multilin_c30, and others. Organizations must ensure they are running the updated firmware to mitigate this vulnerability.
Mitigation & Remediation
Organizations should apply the latest firmware updates as recommended by GE. If an immediate patch is unavailable, consider disabling access to the IEDs from untrusted networks and implementing strict access controls while reviewing and updating configurations.
For further guidance, organizations can refer to resources on penetration testing and security assessments to ensure their systems are resilient against potential attacks.
Detection Guidance
Organizations should monitor logs for unusual access attempts to the IEDs, review access control lists, and ensure that any changes to configurations are documented and audited. Implementing network segmentation can also help in detecting and mitigating potential exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-27426 lies in its reflection on the importance of secure configurations in critical infrastructure systems. This vulnerability serves as a reminder for organizations to regularly assess their security postures and ensure that all configurations are secured against unauthorized access.
Security teams should take this opportunity to review their patch management processes and vulnerability management programs to prevent similar issues in the future. For more information on managing vulnerabilities, organizations can explore our vulnerability management program and best practices in security testing.
As the landscape of cyber threats evolves, organizations must remain vigilant and proactive in securing their systems against known vulnerabilities such as this. Continuous monitoring and security assessments are key components in maintaining a strong security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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