CVE-2025-29312
📋 TL;DR
This vulnerability in ONOS (Open Network Operating System) v2.7.0 allows attackers to trigger unexpected behavior in devices connected to legacy switches by manipulating link types from indirect to direct. This affects organizations using ONOS for software-defined networking with legacy switch infrastructure. The high CVSS score indicates significant potential impact on network operations.
💻 Affected Systems
- ONOS (Open Network Operating System)
📦 What is this software?
Onos by Opennetworking
⚠️ Risk & Real-World Impact
Worst Case
Complete network disruption, unauthorized network reconfiguration, potential data interception or manipulation across affected segments, and denial of service to connected devices.
Likely Case
Network instability, intermittent connectivity issues for devices connected through legacy switches, and potential unauthorized network topology changes.
If Mitigated
Limited to isolated network segments with proper segmentation and monitoring, causing minor operational disruptions that can be quickly detected and remediated.
🎯 Exploit Status
Exploitation requires network access to ONOS controller and knowledge of legacy switch connections. The GitHub gist provides technical details but not full exploit code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Monitor ONOS project updates for patch release
2. Consider upgrading to newer ONOS versions if compatible
3. Apply workarounds until official fix is available
🔧 Temporary Workarounds
Network Segmentation
linuxIsolate ONOS controller and legacy switch management interfaces from untrusted networks
# Configure firewall rules to restrict access to ONOS controller
# Example: iptables -A INPUT -s trusted_network -p tcp --dport 8181 -j ACCEPT
# iptables -A INPUT -p tcp --dport 8181 -j DROP
Access Control Lists
allImplement strict ACLs on legacy switches to prevent unauthorized link type changes
# Configure switch ACLs via CLI
# Example for Cisco: access-list 100 deny tcp any any eq 8181
# access-list 100 permit ip any any
🧯 If You Can't Patch
- Implement network monitoring to detect unexpected link type changes
- Restrict administrative access to ONOS controller to essential personnel only
🔍 How to Verify
Check if Vulnerable:
Check ONOS version: curl -s http://onos-controller:8181/onos/v1/docs/ | grep 'version'Check Version:
curl -s http://onos-controller:8181/onos/v1/docs/ | grep -o '"version":"[^"]*"'Verify Fix Applied:
Monitor for patch announcements from ONOS project and verify version after update📡 Detection & Monitoring
Log Indicators:
- Unexpected link type changes in ONOS logs
- Legacy switch connection anomalies
- Network topology change events without authorization
Network Indicators:
- Unusual traffic patterns between ONOS controller and legacy switches
- Unexpected protocol messages on switch management interfaces
SIEM Query:
source="onos.log" AND ("link type change" OR "indirect to direct")