Honeywell Safety Manager
Monitor7.5ICS-CERT ICSA-22-207-02Jul 26, 2022
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
CVE-2022-30315, CVE-2022-30313, and CVE-2022-30314 are authentication and access control weaknesses in Honeywell Safety Manager and Fail-Safe Controller (FSC). The vulnerabilities allow unauthorized downloading of safety logic and firmware manipulation. CVE-2022-30314 affects all versions prior to R160.1 (October 2014). CVE-2022-30315 and CVE-2022-30313 relate to insufficient enforcement of the key switch control mechanism that should prevent unauthorized logic downloads when locked. Successful exploitation could allow configuration and firmware manipulation or remote code execution on the safety controller.
What this means
What could happen
An attacker could upload malicious firmware or logic to a Safety Manager device, altering safety-critical control logic or shutting down safety systems. This could disable interlocks and safety functions that protect plant operators and equipment.
Who's at risk
Plant safety engineers and OT managers responsible for Honeywell Safety Manager installations used to control safety interlocks, emergency stops, and protective logic in industrial facilities. This affects all versions of Safety Manager and is critical for any facility relying on this system for operator protection.
How it could be exploited
An attacker with network access to the Safety Manager engineering interface can exploit weak authentication or bypass the key switch control mechanism to download unauthorized safety logic or firmware. No authentication may be required if default or weak credentials are in place, or if the key switch is improperly configured.
Prerequisites
- Network access to the Safety Manager engineering interface (typically port 502 or proprietary Honeywell ports)
- Key switch control may be absent or improperly set to unlocked state
- CVE-2022-30314 only affects devices running firmware earlier than R160.1 (released October 2014)
Remotely exploitableNo authentication required (if key switch not locked)Affects safety systemsLow complexity attackNo patch available for all versionsLegacy devices (some versions over 8 years old)
Exploitability
Moderate exploit probability (EPSS 1.4%)
Affected products (2)
2 pending
ProductAffected VersionsFix Status
Safety Manager: vers:all/*All versionsNo fix yet
Safety Manager: <R160.1<R160.1No fix yet
Remediation & Mitigation
0/5
Do now
0/3WORKAROUNDKeep the Safety Manager key switch in the locked position to prevent unauthorized logic downloads
HARDENINGRestrict network access to the Safety Manager engineering interface using firewalls or air-gapping
HARDENINGReview and validate the current Safety Manager configuration and verify key switch state
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXUpgrade Safety Manager to R160.1 or later firmware (released October 2014)
Long-term hardening
0/1HARDENINGImplement network segmentation to isolate Safety Manager from untrusted networks
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