CVE-2024-5267
📋 TL;DR
This vulnerability allows network-adjacent attackers to execute arbitrary code with root privileges on Sonos Era 100 smart speakers without authentication. The flaw exists in SMB2 message handling where improper input validation enables buffer overflow attacks. Only Sonos Era 100 devices are affected.
💻 Affected Systems
- Sonos Era 100
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent malware, steal credentials, pivot to other network devices, or join botnets.
Likely Case
Device takeover for cryptocurrency mining, DDoS participation, or network reconnaissance.
If Mitigated
Limited impact if devices are isolated on separate VLANs with strict network segmentation.
🎯 Exploit Status
ZDI has details but no public exploit. Network adjacency required. SMB2 protocol knowledge needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Sonos app for latest firmware
Vendor Advisory: https://support.sonos.com/en-us/article/sonos-security-updates
Restart Required: Yes
Instructions:
1. Open Sonos app
2. Go to Settings > System > System Updates
3. Check for updates
4. Install available update
5. Device will restart automatically
🔧 Temporary Workarounds
Disable SMB sharing
allTurn off SMB file sharing functionality
In Sonos app: Settings > System > Advanced Settings > File Sharing > Disable
Network segmentation
allIsolate Sonos devices on separate VLAN
🧯 If You Can't Patch
- Segment Sonos devices on isolated network VLAN
- Implement strict firewall rules blocking SMB traffic to/from Sonos devices
🔍 How to Verify
Check if Vulnerable:
Check firmware version in Sonos app: Settings > System > About My SystemCheck Version:
Not applicable - use Sonos app interfaceVerify Fix Applied:
Verify firmware is updated to latest version and SMB is disabled if not needed📡 Detection & Monitoring
Log Indicators:
- Unusual SMB traffic patterns to Sonos devices
- Multiple failed SMB connection attempts
Network Indicators:
- SMB2 protocol anomalies targeting Sonos IPs
- Unexpected outbound connections from Sonos devices
SIEM Query:
source_ip=Sonos_Device AND (protocol=SMB2 OR port=445) AND (anomalous_packet_size OR buffer_overflow_patterns)