ABB SPIET800 and PNI800
Plan Patch7.5ICS-CERT ICSA-22-097-02Apr 7, 2022
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
ABB SPIET800 and PNI800 firmware versions A_B and earlier contain flaws (CWE-372, CWE-241, CWE-400) that allow an attacker to send crafted packets that cause the affected device to become unresponsive and require manual reboot. This results in a denial-of-service condition for any process dependent on the device. ABB has planned firmware updates (SPIET800 version A_C or later, PNI800 version B_0 or later) for Q2 2022, but no patches are currently available. No known public exploits exist at the time of this advisory.
What this means
What could happen
An attacker could send crafted packets to cause the SPIET800 or PNI800 device to become unresponsive, triggering a denial-of-service condition that requires manual reboot and interrupts whatever process the device controls (such as industrial communication, data collection, or control signaling).
Who's at risk
Operators of ABB SPIET800 (industrial communication modules or gateways) and PNI800 (process or network interface devices) should assess whether these devices are deployed in their control systems. Any production process that depends on these devices for communication or control signaling is at risk of unplanned downtime if a device crashes and requires manual recovery.
How it could be exploited
An attacker with network access to the affected device sends specially crafted packets that trigger a processing error in the firmware. The device crashes and stops responding to normal commands, remaining offline until manually rebooted. No credentials or authentication are required.
Prerequisites
- Network access to the device on its listening port
- Device running vulnerable firmware version A_B or earlier
remotely exploitableno authentication requiredlow complexityno patch availablecauses denial of service
Exploitability
Low exploit probability (EPSS 0.5%)
Affected products (2)
2 with fix
ProductAffected VersionsFix Status
SPIET800: Firmware≤ A BA_C or later
PNI800: Firmware≤ A BB_0 or later
Remediation & Mitigation
0/5
Do now
0/1WORKAROUNDRestrict network access to SPIET800 and PNI800 devices by implementing firewall rules to allow only authorized management and process communication traffic
Schedule — requires maintenance window
0/2Patching may require device reboot — plan for process interruption
HOTFIXUpdate SPIET800 to firmware version A_C or later when available (ABB planned Q2 2022 release)
HOTFIXUpdate PNI800 to firmware version B_0 or later when available (ABB planned Q2 2022 release)
Long-term hardening
0/2HARDENINGIsolate control system networks containing these devices from the business network using network segmentation or air-gapping
HARDENINGVerify device connectivity and establish a process to reboot devices quickly if they become unresponsive
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