CVE-2020-6861 Explained : Impact and Mitigation

A flawed protocol design in the Ledger Monero app before 1.5.1 for Ledger Nano and Ledger S devices allows a local attacker to extract the master spending key by sending crafted messages to this app selected on a PIN-entered Ledger connected to a host PC.

Understanding CVE-2020-6861

This CVE entry describes a vulnerability in the Ledger Monero app that could lead to the extraction of the master spending key by a local attacker.

What is CVE-2020-6861?

The vulnerability in the Ledger Monero app allows a local attacker to extract the master spending key by sending specific messages to the app on a PIN-entered Ledger device connected to a host PC.

The Impact of CVE-2020-6861

The exploitation of this vulnerability could result in unauthorized access to the master spending key, compromising the security and confidentiality of the affected Ledger Nano and Ledger S devices.

Technical Details of CVE-2020-6861

This section provides technical details about the vulnerability.

Vulnerability Description

A flawed protocol design in the Ledger Monero app before version 1.5.1 enables a local attacker to extract the master spending key through crafted messages.

Affected Systems and Versions

Product: Ledger Monero app
Versions affected: Before 1.5.1

Exploitation Mechanism

The vulnerability can be exploited by sending specially crafted messages to the Ledger Monero app on a PIN-entered Ledger device connected to a host PC.

Mitigation and Prevention

Protecting against and addressing the CVE-2020-6861 vulnerability.

Immediate Steps to Take

Update the Ledger Monero app to version 1.5.1 or later to mitigate the vulnerability.
Avoid connecting the Ledger device to untrusted or compromised host PCs.

Long-Term Security Practices

Regularly check for security updates and patches for the Ledger Monero app.
Implement secure practices when using Ledger devices to prevent unauthorized access.
Educate users on safe usage practices to minimize the risk of exploitation.
Monitor for any suspicious activity on Ledger devices.

Patching and Updates

Ensure that all Ledger Nano and Ledger S devices are updated to the latest version of the Ledger Monero app to patch the vulnerability.