CVE-2019-14354 : Exploit Details and Defense Strategies

Researchers have discovered a side channel vulnerability in the OLED display of Ledger Nano S and Nano X devices, potentially exposing confidential information to attackers.

Understanding CVE-2019-14354

What is CVE-2019-14354?

The vulnerability is based on the power consumption of the display, allowing attackers to access sensitive data like PIN and BIP39 mnemonic through a hardware implant in the USB cable.

The Impact of CVE-2019-14354

This vulnerability poses a risk when attackers can measure power consumption while secret data is displayed, but is not a threat in scenarios like a stolen device not actively showing secret information.

Technical Details of CVE-2019-14354

Vulnerability Description

The side channel vulnerability in the OLED display of Ledger Nano S and Nano X devices enables attackers to exploit power consumption variances to access confidential information.

Affected Systems and Versions

Affected devices: Ledger Nano S and Nano X
All versions are susceptible

Exploitation Mechanism

Attackers with control over the USB connection can exploit power consumption measurements during data display

Mitigation and Prevention

Immediate Steps to Take

Avoid using the devices in environments where power consumption can be measured
Keep devices physically secure to prevent hardware implants

Long-Term Security Practices

Regularly update device firmware to patch vulnerabilities
Implement secure USB connections and monitor for unusual power consumption

Patching and Updates

Stay informed about security advisories from Ledger
Apply firmware updates promptly to mitigate known vulnerabilities