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CISA Warns of Multiple Critical Vulnerabilities Affecting Mitsubishi Electric PLCs

CISA Warns of Multiple Critical Vulnerabilities Affecting Mitsubishi Electric PLCs
Dec 02, 2022 ICS Security / Encryption
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) this week released an Industrial Control Systems (ICS) advisory warning of multiple vulnerabilities in Mitsubishi Electric GX Works3 engineering software. "Successful exploitation of these vulnerabilities could allow unauthorized users to gain access to the MELSEC iQ-R/F/L series CPU modules and the MELSEC iQ-R series OPC UA server module or to view and execute programs," the agency  said . GX Works3  is an  engineering workstation  software used in ICS environments, acting as a mechanism for uploading and downloading programs from/to the controller, troubleshooting software and hardware issues, and performing maintenance operations. The wide range of functions also makes the platform an attractive target for threat actors looking to compromise such systems to commandeer the  managed PLCs . Three of the 10 shortcomings relate to cleartext storage of sensitive data, four relate to the use of a hard-coded cr

Unpatched Security Flaws Expose Mitsubishi Safety PLCs to Remote Attacks

Unpatched Security Flaws Expose Mitsubishi Safety PLCs to Remote Attacks
Aug 05, 2021
Multiple unpatched security vulnerabilities have been disclosed in Mitsubishi safety programmable logic controllers (PLCs) that could be exploited by an adversary to acquire legitimate user names registered in the module via a brute-force attack, unauthorizedly login to the CPU module, and even cause a denial-of-service (DoS) condition. The security weaknesses, disclosed by  Nozomi Networks , concern the implementation of an authentication mechanism in the  MELSEC communication protocol  that's used to communicate and exchange data with the target devices by reading and writing data to the CPU module. A quick summary of the flaws is listed below - Username Brute-force (CVE-2021-20594, CVSS score: 5.9) - Usernames used during authentication are effectively brute-forceable Anti-password Brute-force Functionality Leads to Overly Restrictive Account Lockout Mechanism (CVE-2021-20598, CVSS score: 3.7) - The implementation to thwart brute-force attacks not only blocks a potential

How to Accelerate Vendor Risk Assessments in the Age of SaaS Sprawl

How to Accelerate Vendor Risk Assessments in the Age of SaaS Sprawl
Mar 21, 2024SaaS Security / Endpoint Security
In today's digital-first business environment dominated by SaaS applications, organizations increasingly depend on third-party vendors for essential cloud services and software solutions. As more vendors and services are added to the mix, the complexity and potential vulnerabilities within the  SaaS supply chain  snowball quickly. That's why effective vendor risk management (VRM) is a critical strategy in identifying, assessing, and mitigating risks to protect organizational assets and data integrity. Meanwhile, common approaches to vendor risk assessments are too slow and static for the modern world of SaaS. Most organizations have simply adapted their legacy evaluation techniques for on-premise software to apply to SaaS providers. This not only creates massive bottlenecks, but also causes organizations to inadvertently accept far too much risk. To effectively adapt to the realities of modern work, two major aspects need to change: the timeline of initial assessment must shorte
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