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Mitsubishi Electrical PLCs Uncovered to Assaults by Engineering Software program Flaws

By Eduard Kovacs on December 02, 2022

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Researchers at industrial cybersecurity agency Nozomi Networks have found three vulnerabilities in Mitsubishi Electrical’s GX Works3 engineering workstation software program that might be exploited to hack security programs.

GX Works3 is the configuration and programming software program supplied by Mitsubishi Electrical for its MELSEC iQ-F and iQ-R programmable logic controllers (PLCs).

Nozomi researchers recognized three safety holes — tracked as CVE-2022-29831, CVE-2022-29832 and CVE-2022-29833 — that might enable an attacker to acquire data from GX Works3 mission information to compromise related security CPU modules.

The mission information for these modules are encrypted and a user-configured username and password are required to open them. Nonetheless, Nozomi found hardcoded password, cleartext storage, and inadequate credential safety points that expose these credentials and different delicate data.

A menace actor might acquire a mission file from a misconfigured file server, from a shared pc, or by intercepting unprotected communications. As soon as they’ve the file, they’ll exploit the vulnerabilities to acquire data wanted to hack industrial management programs (ICS).

In keeping with Nozomi, an attacker might “abuse the primary two points and acquire confidential data included within the mission file in regards to the mission itself, in addition to in regards to the usernames of the accounts registered on the associated security CPU module.”

The corporate added, “Nonetheless, if an asset proprietor has opted to re-use the identical credentials for accessing the protection CPU module to additionally defend the associated mission file, a way more harmful state of affairs would happen. As a matter of reality, on this scenario, an attacker might chain all three points and acquire a remarkably highly effective assault primitive that may enable them to immediately entry the protection CPU module. This may give them the potential alternative to compromise it and, subsequently, disrupt the managed industrial course of.”

Mitsubishi Electrical has launched an advisory describing these vulnerabilities and the US Cybersecurity and Infrastructure Safety Company (CISA) has launched its personal advisory to tell organizations utilizing these merchandise. The advisories from Mitsubishi and CISA additionally describe seven different vulnerabilities affecting the identical product.

Nonetheless, Mitsubishi has but to launch patches and has solely supplied mitigations and workarounds. Nozomi has not made public any technical data in an effort to stop potential exploitation by malicious actors.

Associated: Mitsubishi Electrical Patches Vulnerabilities in Air Conditioning Programs

Associated: Development Micro OfficeScan Flaw Apparently Exploited in Mitsubishi Electrical Hack

Associated: Mitsubishi Patches Vulnerabilities Disclosed at ICS Hacking Contest

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