CVE-2024-40085
📋 TL;DR
A buffer overflow vulnerability in Vilo 5 Mesh WiFi System allows remote, unauthenticated attackers to execute arbitrary code by sending oversized PPPoE username or password fields. This affects Vilo 5 Mesh WiFi System devices running firmware version 5.16.1.33 or earlier. Attackers can potentially take full control of affected devices.
💻 Affected Systems
- Vilo 5 Mesh WiFi System
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to disrupt network connectivity, steal credentials, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict ingress filtering and network segmentation.
🎯 Exploit Status
Exploitation requires sending specially crafted PPPoE authentication packets to the vulnerable function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://vilo.com
Restart Required: Yes
Instructions:
1. Check vendor website for firmware updates. 2. Download latest firmware. 3. Upload via admin interface. 4. Reboot device.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Vilo devices from untrusted networks and restrict access to management interfaces.
Firewall Rules
allBlock external access to Vilo management interfaces and PPPoE-related ports.
🧯 If You Can't Patch
- Replace vulnerable devices with patched alternatives
- Implement strict network segmentation and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in device admin interface. If version is 5.16.1.33 or lower, device is vulnerable.Check Version:
Check via web interface at device IP addressVerify Fix Applied:
Verify firmware version is higher than 5.16.1.33 after update.📡 Detection & Monitoring
Log Indicators:
- Unusual PPPoE authentication attempts
- Buffer overflow error messages in system logs
- Unexpected device reboots
Network Indicators:
- Malformed PPPoE packets >128 bytes
- Unusual outbound connections from Vilo devices
- Traffic to known exploit servers
SIEM Query:
source="vilo" AND (event="buffer_overflow" OR pppoe_packet_size>128)