CVE-2022-31277
📋 TL;DR
CVE-2022-31277 is a replay attack vulnerability in Xiaomi Lamp 1 smart bulbs that allows attackers to capture and reuse authentication requests. This bypasses access controls, enabling unauthorized control of lighting functions. Users of Xiaomi Lamp 1 v2.0.4_0066 are affected.
💻 Affected Systems
- Xiaomi Lamp 1
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain persistent control over lighting systems, potentially enabling physical safety risks, privacy invasion through lighting patterns, or integration into botnets for DDoS attacks.
Likely Case
Unauthorized users toggle lights on/off, change brightness/colors, or disrupt scheduled lighting operations, causing annoyance and potential energy waste.
If Mitigated
With proper network segmentation and monitoring, impact is limited to isolated lighting control without access to other network resources.
🎯 Exploit Status
Exploitation requires capturing legitimate POST requests via network sniffing, then replaying them; tools like Wireshark and curl can be used.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: Not publicly available
Restart Required: No
Instructions:
No official patch available; refer to workarounds and risk reduction steps.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Xiaomi Lamp devices on a separate VLAN or network segment to limit attack surface.
Disable Remote Access
allEnsure devices are not exposed to the internet via port forwarding or UPnP.
🧯 If You Can't Patch
- Monitor network traffic for repeated POST requests to device endpoints.
- Consider replacing vulnerable devices with updated models if available.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via Xiaomi app; if version is v2.0.4_0066, device is vulnerable.Check Version:
Check through Xiaomi Mi Home app device settings.Verify Fix Applied:
No official fix available; verify workarounds by testing network isolation and access controls.📡 Detection & Monitoring
Log Indicators:
- Repeated POST requests to device IP on port 54321 from unexpected sources.
Network Indicators:
- Unusual traffic patterns to/from smart bulb devices, especially replay of similar requests.
SIEM Query:
source_ip=* AND dest_port=54321 AND http_method=POST AND count>10 within 1m