OTPulse

FATEK Automation WinProladder

MonitorCVSS 7.8ICS-CERT ICSA-21-320-01Nov 16, 2021
FATEK
Attack path
Attack VectorLocal
Auth RequiredNone
ComplexityLow
User InteractionRequired
Summary

FATEK WinProladder versions 3.30_24518 and earlier contain buffer overflow vulnerabilities (CWE-787, CWE-121) that could allow arbitrary code execution if a user opens a malicious file or clicks a malicious link. Successful exploitation could allow an attacker to run code on the engineering workstation with the same privileges as the user, potentially leading to modification of PLC programs, theft of engineering data, or compromise of plant control logic before deployment to field devices. FATEK Automation has not responded to CISA requests and has not provided a patch. No public exploits are currently known, and these vulnerabilities are not remotely exploitable.

What this means
What could happen
An attacker could execute arbitrary code on a machine running WinProladder, potentially altering or disrupting PLC ladder logic programs, process parameters, or engineering workstation configurations. Since WinProladder is used to develop and deploy PLC programs that control industrial processes, compromise could lead to unauthorized changes to plant operations or complete loss of control.
Who's at risk
This affects any organization using FATEK WinProladder software to develop and manage PLC programs for water treatment plants, wastewater systems, electric substations, or other automated industrial processes. Engineering teams, system integrators, and plant maintenance personnel who use WinProladder are at risk if they access email or untrusted files on their workstations.
How it could be exploited
An attacker would need to trick a user into opening a malicious file or link (social engineering via email or web), which would execute arbitrary code on the engineering workstation running WinProladder. The attacker could then modify PLC programs before they are downloaded to field devices, or steal engineering data and credentials used to access the plant network.
Prerequisites
  • User interaction required: victim must click a malicious link or open an unsolicited attachment
  • WinProladder must be installed and running on the engineering workstation
  • Local or physical access to the workstation, or ability to deliver a malicious file via email or web
No patch availableLocal exploitation only but high impact if engineering workstation is compromisedRequires user interaction (social engineering)Affects engineering/control software
Exploitability
Unlikely to be exploited — EPSS score 0.6%
Affected products (1)
ProductAffected VersionsFix Status
WinProladder:≤ 3.30 24518No fix (EOL)
Remediation & Mitigation
0/6
Do now
0/2
WORKAROUNDDo not click web links or open unsolicited attachments in email messages
HARDENINGEnforce email security controls to block or quarantine unsolicited attachments and external links
Schedule — requires maintenance window
0/4

Patching may require device reboot — plan for process interruption

HARDENINGIsolate engineering workstations running WinProladder on a separate network segment with restricted outbound internet access
HARDENINGImplement application whitelisting on engineering workstations to restrict execution of unsigned or unauthorized programs
HOTFIXContact FATEK customer support to inquire about security patches or migration to a supported product version
HARDENINGRequire multi-factor authentication for access to engineering workstations and version control systems storing PLC programs
View full CISA ICS-CERT advisory
API: /api/v1/advisories/a15c3f9a-263d-45a2-a21b-5c4b7660d61e

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