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Pilz: Multiple products prone to WIBU-SYSTEMS CodeMeter vulnerabilities

Act Now9.8VDE-2020-033Sep 10, 2020
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

Multiple Pilz software tools (CODESYS DevSys, PASvisu, PAS4000, PNOZsigma, SafetyEYE, Live Video Server) use WIBU-SYSTEMS CodeMeter Runtime for license management. CodeMeter Runtime versions below 6.90 contain multiple vulnerabilities in license file verification (CWE-346, CWE-347), input validation (CWE-20), and cryptographic handling (CWE-326) that allow attackers to forge license files, cause denial-of-service, or execute arbitrary code without authentication. Affected Pilz products can be patched to version 7.10, but CodeMeter Runtime itself has no patch planned if used as a standalone component.

What this means
What could happen
An attacker with network access could forge license files, disrupt operations by causing denial-of-service, or execute arbitrary code on devices running vulnerable CodeMeter Runtime versions. This affects all Pilz safety and process control tools that depend on CodeMeter for license management.
Who's at risk
Organizations operating Pilz safety systems and automation tools including CODESYS DevSys, PASvisu, PAS4000, PNOZsigma, SafetyEYE, and Live Video Server. Any facility using these products for industrial process control, safety management, or visual monitoring is affected.
How it could be exploited
An attacker with network connectivity to a device running vulnerable CodeMeter Runtime can send crafted requests to manipulate license validation. By exploiting weaknesses in license file verification (CWE-346, CWE-347) and insufficient input validation (CWE-20), the attacker could forge valid license files, trigger crashes, or inject code that executes with the Runtime's privileges.
Prerequisites
  • Network access to CodeMeter Runtime (default: listening on network interfaces)
  • No authentication required
  • Vulnerable CodeMeter Runtime version <6.90 installed on the target device
Remotely exploitableNo authentication requiredLow complexity attackHigh CVSS score (9.8)No patch available for CodeMeter Runtime standaloneAffects safety-critical systems
Affected products (7)
6 with fix1 EOL
ProductAffected VersionsFix Status
Software CODESYS DevSys <=V3 3.5.12<6.907.10
Software Live Video Server <=1.1.0<6.907.10
Software PAS4000 <=1.21.1<6.907.10
Software CodeMeter Runtime <6.90<6.90No fix (EOL)
Software PASvisu <=1.9.0<6.907.10
Software PNOZsigma <=1.3.0<6.907.10
Software SafetyEYE 3.0.0<=3.0.1<6.907.10
Remediation & Mitigation
0/3
Do now
0/2
HARDENINGEnsure CodeMeter Runtime is configured to run as Client only (verify default configuration is not overridden)
WORKAROUNDDeploy local firewall rules to restrict network access to CodeMeter Runtime services, allowing only trusted engineering workstations and administrative systems
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpdate CodeMeter Runtime to version 7.10 or later from WIBU-SYSTEMS website
View full CERT@VDE advisory
API: /api/v1/advisories/5e38521b-d327-45b3-840f-1bf8ffe301aa