CVE-2025-55087
📋 TL;DR
This vulnerability in NextX Duo's SNMP addon allows attackers to trigger an out-of-bounds read via specially crafted SNMPv3 security parameters. This could lead to information disclosure or system crashes. Systems using Eclipse Foundation ThreadX with NextX Duo SNMP addon versions before 6.4.4 are affected.
💻 Affected Systems
- NextX Duo SNMP addon
- Eclipse Foundation ThreadX
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution or complete system compromise through memory corruption leading to arbitrary code execution.
Likely Case
Information disclosure through memory leaks or denial of service through system crashes.
If Mitigated
Limited impact with proper network segmentation and SNMP access controls in place.
🎯 Exploit Status
Exploitation requires SNMPv3 access but no authentication. Attack complexity depends on memory layout.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.4.4
Vendor Advisory: https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-v474-mv4g-v8cx
Restart Required: Yes
Instructions:
1. Update NextX Duo SNMP addon to version 6.4.4 or later. 2. Recompile and redeploy affected ThreadX applications. 3. Restart affected systems.
🔧 Temporary Workarounds
Disable SNMPv3
allDisable SNMPv3 protocol support to prevent exploitation.
Configure SNMP to use only SNMPv1/v2c or disable SNMP entirely
Network Access Control
linuxRestrict 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 strict network segmentation to isolate SNMP traffic
- Deploy intrusion detection systems to monitor for SNMP exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check NextX Duo SNMP addon version. If version < 6.4.4 and SNMPv3 is enabled, system is vulnerable.Check Version:
Check application build configuration or consult system documentation for NextX Duo version.Verify Fix Applied:
Verify NextX Duo SNMP addon version is 6.4.4 or later and test SNMPv3 functionality.📡 Detection & Monitoring
Log Indicators:
- SNMP protocol errors
- Memory access violation logs
- System crash/restart events
Network Indicators:
- Unusual SNMPv3 traffic patterns
- SNMP requests with malformed security parameters
SIEM Query:
source="snmpd" AND (error OR violation OR crash)