ICONICS GENESIS64 and Mitsubishi Electric MC Works64
Plan Patch7.8ICS-CERT ICSA-21-294-01Oct 21, 2021
Attack VectorLocal
Auth RequiredNone
ComplexityLow
User InteractionRequired
Summary
Buffer overflow and out-of-bounds read vulnerabilities in ICONICS GENESIS64 (all versions up to 10.97) and Mitsubishi Electric MC Works64 (all versions up to 4.04E) allow code execution when a user opens a malicious AutoCAD DWG file or is socially engineered to click a malicious link. The vulnerabilities exist in file parsing logic and require local access and user interaction. ICONICS has stated that GENESIS64 Version 10.97.1 and later will not be vulnerable. No public exploits are currently known, and these vulnerabilities are not remotely exploitable.
What this means
What could happen
An attacker who gains local access to a workstation running GENESIS64 or MC Works64 could execute arbitrary code with the privileges of the logged-in user, potentially allowing them to modify HMI configurations, process data, or operator commands that control the industrial process.
Who's at risk
Energy sector organizations using ICONICS GENESIS64 HMI software or Mitsubishi Electric MC Works64 engineering tools on Windows workstations should care. This affects operators, engineers, and maintenance staff who work with these systems on computers that also have email access.
How it could be exploited
An attacker must trick a user into opening a malicious AutoCAD DWG file or clicking a link in email while logged into a workstation with GENESIS64 or MC Works64 installed. The vulnerability exists in the file parsing logic (CWE-787 buffer overflow, CWE-125 out-of-bounds read), allowing code execution when the crafted file is processed.
Prerequisites
- Local access to a workstation or engineering station running GENESIS64 (version 10.97 or earlier) or MC Works64 (version 4.04E or earlier)
- User must open a malicious AutoCAD DWG file or click a malicious email link
- Attacker relies on social engineering rather than network-level exploitation
No patch currently available for MC Works64No patch currently available for GENESIS64 (patch in development)Local access required—lower risk than remote, but still exploitable via social engineeringAffects HMI/supervisory systems which control process operationsBuffer overflow vulnerability (CWE-787) with memory access issues (CWE-125)
Exploitability
Low exploit probability (EPSS 0.4%)
Affected products (2)
1 with fix1 pending
ProductAffected VersionsFix Status
MC Works64: (all≤ 4.04ENo fix yet
GENESIS64: (all≤ 10.9710.97.1
Remediation & Mitigation
0/5
Do now
0/1WORKAROUNDRestrict access to DWG file imports and disable AutoCAD file opening in GENESIS64/MC Works64 if not required for operations
Schedule — requires maintenance window
0/2Patching may require device reboot — plan for process interruption
HOTFIXUpgrade GENESIS64 to version 10.97.1 or later when the Critical Fix Rollup becomes available
HOTFIXUpgrade MC Works64 to a patched version when available from Mitsubishi Electric
Long-term hardening
0/2HARDENINGImplement firewall rules to isolate control system networks from the business network and internet
HARDENINGTrain operators and engineering staff not to open unsolicited email attachments or click links from untrusted sources
CVEs (2)
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