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How the CVE Works:
The vulnerability resides in the Modbus RTU over TCP stack of the Socomec DIRIS Digiware M-70 firmware version 1.6.9. Modbus RTU over TCP encapsulates traditional serial Modbus RTU frames within TCP packets. The device’s parsing logic for these incoming network packets contains a flaw where a specially crafted packet causes a critical error. This crafted packet, which could contain malformed data, unexpected sequence, or invalid parameters within the RTU frame header or payload, is not properly handled by the firmware. When the vulnerable code processes this packet, it triggers an unhandled exception or resource exhaustion, leading to a process crash or system reboot. As the Modbus service is often unauthenticated, an attacker can repeatedly send this packet to the device’s TCP port (typically 502) from a remote network location, resulting in a persistent denial of service condition that renders the energy monitoring device unavailable.
DailyCVE Form:
Platform: Socomec DIRIS Digiware
Version: 1.6.9
Vulnerability: Denial of Service
Severity: High
date: 12/01/2025
Prediction: 2025-01-31
What Undercode Say:
Analytics
nmap -p 502 --script modbus-discover <target_ip> hping3 -S -p 502 --flood --data 200 <target_ip> python3 -c "from scapy.all import ; send(IP(dst='TARGET_IP')/TCP(dport=502)/Raw(load='\x00\x01\x00\x00\x00\x06\xff\x00'))"
How Exploit:
Send crafted Modbus/TCP packet to port 502. Malformed RTU frame causes crash. Unauthenticated network attack.
Protection from this CVE
Network segmentation for ICS. Firewall rules blocking. Apply vendor patch.
Impact:
Persistent device unavailability. Disrupts monitoring. Affects operational visibility.
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Sources:
Reported By: nvd.nist.gov
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