CVE-2022-21806
📋 TL;DR
A use-after-free vulnerability in the mips_collector appsrv_server of Anker Eufy Homebase 2 allows remote attackers to execute arbitrary code via specially crafted network packets. This affects users of the Eufy Homebase 2 device, exposing it to network-based attacks.
💻 Affected Systems
- Anker Eufy Homebase 2
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full device compromise, data theft, or botnet recruitment.
Likely Case
Remote code execution enabling unauthorized access and control of the device.
If Mitigated
Limited impact if network access is restricted or patches are applied.
🎯 Exploit Status
Exploitation involves crafting network packets; no public proof-of-concept is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for updates beyond 2.1.8.5h
Vendor Advisory: https://talosintelligence.com/vulnerability_reports/TALOS-2022-1440
Restart Required: Yes
Instructions:
1. Check for firmware updates via the Eufy app or vendor website. 2. Apply the latest firmware patch. 3. Restart the device to ensure changes take effect.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to the Homebase 2 device to trusted internal networks only.
Firewall Rules
linuxBlock unnecessary inbound network traffic to the device using firewall rules.
iptables -A INPUT -p tcp --dport [device_port] -j DROP
🧯 If You Can't Patch
- Isolate the device on a separate VLAN to limit attack surface.
- Monitor network traffic for anomalous packets targeting the device.
🔍 How to Verify
Check if Vulnerable:
Check the firmware version via the Eufy app or device interface; if it is 2.1.8.5h or earlier, it is vulnerable.Check Version:
Use the Eufy app settings or device web interface to view firmware version.Verify Fix Applied:
Verify the firmware version has been updated to a patched release as indicated by the vendor.📡 Detection & Monitoring
Log Indicators:
- Unusual network connection attempts or crashes in appsrv_server logs
Network Indicators:
- Suspicious packets targeting the mips_collector service on the device
SIEM Query:
Example: 'source_ip=* AND dest_ip=[device_ip] AND port=[device_port] AND payload_contains="mips_collector"'