CVE-2023-30351
📋 TL;DR
This vulnerability allows attackers to gain root access to Tenda CP3 IP cameras via TELNET or UART using hard-coded default credentials with weak encryption. All users of affected camera models with default configurations are vulnerable. Attackers can fully compromise the device and potentially pivot to other network resources.
💻 Affected Systems
- Tenda CP3 IP Camera
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to video surveillance compromise, network pivoting to other systems, installation of persistent malware, and use in botnets.
Likely Case
Unauthorized access to camera feeds, device configuration changes, and potential use as network foothold for further attacks.
If Mitigated
Limited to isolated camera compromise if network segmentation prevents lateral movement and cameras are not internet-facing.
🎯 Exploit Status
Simple credential-based attack requiring only network access to TELNET/UART service. Public GitHub references contain technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not found in provided references
Restart Required: No
Instructions:
Check Tenda website for firmware updates. If available, download latest firmware and follow vendor update procedure for CP3 cameras.
🔧 Temporary Workarounds
Disable TELNET/UART services
allDisable TELNET and UART access if not required for operations
Check camera web interface for service settings
Disable TELNET/UART if options available
Change default credentials
linuxChange root password to strong unique password
passwd root (after gaining access via existing method)
Enter new strong password
🧯 If You Can't Patch
- Network segmentation: Isolate cameras in separate VLAN with strict firewall rules
- Disable external access: Ensure cameras are not accessible from internet
🔍 How to Verify
Check if Vulnerable:
Attempt TELNET connection to camera port 23 using default credentials. Check if UART access is physically available.Check Version:
Check camera web interface or use command: cat /proc/version (if already accessed)Verify Fix Applied:
Verify TELNET/UART access is disabled or requires strong authentication. Test with default credentials should fail.📡 Detection & Monitoring
Log Indicators:
- Failed/successful TELNET authentication attempts
- UART access logs if available
- Root login events
Network Indicators:
- TELNET connections to camera IPs
- Unusual outbound traffic from cameras
SIEM Query:
source="camera_logs" AND (event="TELNET" OR event="root_login")