CVE-2020-7131 Explained : Impact and Mitigation

Blade Maintenance Entity, Integrated Maintenance Entity, and Maintenance Entity products are affected by a security vulnerability associated with an open UDP port 17185 on the Maintenance LAN. This vulnerability could lead to information disclosure, denial-of-service attacks, or local memory corruption.

Understanding CVE-2020-7131

This CVE describes a security issue impacting various maintenance entities within J/H-series NonStop systems.

What is CVE-2020-7131?

The vulnerability in Blade Maintenance Entity, Integrated Maintenance Entity, and Maintenance Entity products allows attackers to exploit an open UDP port on the Maintenance LAN, potentially resulting in severe consequences such as information disclosure, denial-of-service attacks, or system control.

The Impact of CVE-2020-7131

The vulnerability could lead to information disclosure, denial-of-service attacks, local memory corruption, and potential complete control of the affected system if accessed through the Maintenance LAN.

Technical Details of CVE-2020-7131

Blade Maintenance Entity, Integrated Maintenance Entity, and Maintenance Entity products are affected by this security flaw.

Vulnerability Description

The security vulnerability is due to an open UDP port 17185 on the Maintenance LAN, allowing for potential exploitation by unauthorized parties.

Affected Systems and Versions

Integrated Maintenance Entity T1805: Versions T1805A01 through T1805A01^AAH
Maintenance Entity T2805: Versions T2805A01 through T2805A01^AAU
Blade Maintenance Entity FW T4805: Versions T4805A01 through T4805A01^AAY

Exploitation Mechanism

To exploit this vulnerability, an attacker needs access to the Maintenance LAN connected to the affected products.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2020-7131.

Immediate Steps to Take

Block UDP port 17185 on the Maintenance LAN Network Switch/Firewall.

Long-Term Security Practices

Regularly monitor and update security configurations.
Implement network segmentation to restrict access to critical ports.

Patching and Updates

Install the following SPRs: T1805A01^AAI for Integrated Maintenance Entity and T4805A01^AAZ for Blade Maintenance Entity.
Ensure the SPRs are compatible with the specified RVUs.
Note that no fix is planned for certain RVUs, H-Series NonStop systems, or the product T2805 (Maintenance Entity).