CVE-2024-6964
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Tenda O3 firmware allows remote attackers to execute arbitrary code by manipulating DHCP server parameters. This affects Tenda O3 devices running firmware version 1.0.0.10. Attackers can exploit this without authentication to potentially take full control of affected devices.
💻 Affected Systems
- Tenda O3
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, enabling attackers to install persistent malware, pivot to internal networks, or create botnet nodes.
Likely Case
Device takeover allowing network traffic interception, credential theft, and lateral movement within the network.
If Mitigated
Limited impact if devices are isolated in separate VLANs with strict network segmentation and egress filtering.
🎯 Exploit Status
Exploit details are publicly available on GitHub, making weaponization straightforward. The vendor has not responded to disclosure attempts.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch is available. Monitor Tenda's website for firmware updates. If an update becomes available, download from official sources only and follow vendor flashing instructions carefully.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Tenda O3 devices in separate VLANs with strict firewall rules to limit attack surface.
Disable Remote Management
allDisable WAN-side administration and restrict management interfaces to trusted internal networks only.
🧯 If You Can't Patch
- Replace affected devices with alternative products that receive security updates
- Implement strict network access controls and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface at http://[device-ip]/goform/getStatus or via serial console. Version 1.0.0.10 is vulnerable.Check Version:
curl -s http://[device-ip]/goform/getStatus | grep -o '"firmwareVersion":"[^"]*"'Verify Fix Applied:
Verify firmware version has been updated to a version later than 1.0.0.10. No official fix exists as of current information.📡 Detection & Monitoring
Log Indicators:
- Unusual DHCP configuration requests
- Multiple failed buffer overflow attempts in system logs
- Unexpected device reboots or crashes
Network Indicators:
- Unusual traffic patterns to/from Tenda O3 devices
- Exploit payload patterns in network traffic
- Unexpected outbound connections from devices
SIEM Query:
source="tenda_o3" AND (event_type="dhcp_config_change" OR event_type="buffer_overflow")🔗 References
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/O3V2.0/fromDhcpSetSer.md
- https://vuldb.com/?ctiid.272118
- https://vuldb.com/?id.272118
- https://vuldb.com/?submit.374585
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/O3V2.0/fromDhcpSetSer.md
- https://vuldb.com/?ctiid.272118
- https://vuldb.com/?id.272118
- https://vuldb.com/?submit.374585
