Static Cryptographic Key in Kasa EC71/EC70 Firmware

Executive Summary

This vulnerability involves TP-Link Kasa EC70 v4 and EC71 v4 devices using a static cryptographic private key stored in their firmware. The key is shared across all devices, allowing attackers who obtain the firmware to extract it. This enables unauthorized decryption of network traffic or man-in-the-middle attacks.

Useful 0 Not Useful 0

Detection Guidance

Detecting this vulnerability requires checking for the presence of the static cryptographic private key in the firmware of Kasa EC70 v4 or EC71 v4 devices. Inspect the firmware image for hardcoded keys or use network monitoring tools to detect unauthorized decryption of traffic.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability may allow an unauthenticated attacker on the same network to use the extracted key in the web management service, compromising encrypted communications. This could enable passive decryption of traffic or active man-in-the-middle attacks.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability may compromise compliance with GDPR and HIPAA due to the risk of unauthorized decryption of sensitive data. The static cryptographic key allows attackers to intercept and decrypt encrypted communications, potentially exposing personal or health information.

Useful 0 Not Useful 0

Mitigation Strategies

• Check TP-Link's security advisory for official patches or updates for EC70 v4 and EC71 v4 devices.
• Isolate affected devices from sensitive networks to prevent MITM attacks.
• Monitor network traffic for unusual decryption attempts or unauthorized access.
• Replace or update firmware if patches are available from TP-Link.

Useful 0 Not Useful 0