CVE-2025-41654
📋 TL;DR
An unauthenticated remote attacker can exploit this SNMP vulnerability to access process information and trigger a system reboot via watchdog. This affects systems with SNMP enabled and exposed to untrusted networks. The vulnerability allows denial of service and information disclosure.
💻 Affected Systems
- Specific product information not provided in CVE description
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system reboot leading to extended downtime, potential data loss from interrupted processes, and information disclosure about running services that could enable further attacks.
Likely Case
System reboot causing service disruption and temporary unavailability, combined with exposure of process information that could aid reconnaissance for additional attacks.
If Mitigated
Limited to information disclosure only if watchdog reboot mechanism is prevented, but SNMP data remains accessible to unauthorized parties.
🎯 Exploit Status
Exploitation requires SNMP access but no authentication. Attack involves querying SNMP to retrieve process information that triggers watchdog reboot.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://cert.vde.com/en/advisories/VDE-2025-011
Restart Required: Yes
Instructions:
1. Check vendor advisory for specific patch information. 2. Apply available security updates. 3. Restart affected services or systems as required.
🔧 Temporary Workarounds
Disable SNMP Service
linuxCompletely disable SNMP service if not required
systemctl stop snmpd
systemctl disable snmpd
Restrict SNMP Access
linuxConfigure firewall rules to restrict SNMP access to trusted networks only
iptables -A INPUT -p udp --dport 161 -s TRUSTED_NETWORK -j ACCEPT
iptables -A INPUT -p udp --dport 161 -j DROP
🧯 If You Can't Patch
- Implement network segmentation to isolate SNMP services from untrusted networks
- Configure SNMP with strong community strings and access controls
🔍 How to Verify
Check if Vulnerable:
Check if SNMP service is running and accessible on port 161/UDP from untrusted networksCheck Version:
snmpd --versionVerify Fix Applied:
Verify SNMP service is either disabled or properly restricted after applying controls📡 Detection & Monitoring
Log Indicators:
- Unusual SNMP query patterns
- Watchdog-triggered reboots
- Multiple process information requests via SNMP
Network Indicators:
- High volume of SNMP requests from single source
- SNMP queries for process table (hrSWRunTable)
SIEM Query:
source_port:161 AND (event_type:"SNMP_QUERY" OR protocol:"SNMP") AND (query:"hrSWRun" OR query:"process")