CVE-2020-25782
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute arbitrary code on affected Accfly wireless security cameras via a stack-based buffer overflow. Attackers can take full control of the camera system by sending specially crafted messages to the vulnerable function. All users of Accfly Wireless Security IR Camera 720P System with vulnerable software versions are affected.
💻 Affected Systems
- Accfly Wireless Security IR Camera 720P System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, install malware, pivot to internal networks, and permanently disable security cameras.
Likely Case
Remote code execution leading to camera hijacking, surveillance disruption, and potential lateral movement within the network.
If Mitigated
Limited impact if cameras are isolated in separate VLANs with strict network segmentation and egress filtering.
🎯 Exploit Status
The vulnerability is in a network message handling function, making remote exploitation straightforward. Public GitHub repository contains details and likely exploit code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: Yes
Instructions:
1. Check if vendor has released firmware update beyond v4.15.77
2. If update available, download from official vendor source
3. Follow vendor firmware update procedure
4. Reboot camera after update
5. Verify new firmware version
🔧 Temporary Workarounds
Network Segmentation
allIsolate cameras in separate VLAN with strict firewall rules
Access Control Lists
allRestrict network access to cameras from authorized IPs only
🧯 If You Can't Patch
- Immediately disconnect affected cameras from internet and critical networks
- Implement strict network segmentation with firewall rules blocking all unnecessary traffic to camera ports
🔍 How to Verify
Check if Vulnerable:
Check camera firmware version via web interface or management console. If version is between v3.10.73 and v4.15.77 inclusive, system is vulnerable.Check Version:
Check via camera web interface at http://[camera-ip]/ or consult device management softwareVerify Fix Applied:
Verify firmware version is above v4.15.77. Test by attempting to access camera with restricted network access to confirm segmentation.📡 Detection & Monitoring
Log Indicators:
- Unusual network traffic to camera on port 80/443
- Multiple connection attempts from single source
- Firmware version change alerts
Network Indicators:
- Large or malformed packets sent to camera IP on standard ports
- Traffic patterns matching buffer overflow exploitation
SIEM Query:
source_ip=[camera_ip] AND (port=80 OR port=443) AND packet_size>threshold AND protocol=TCP