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CVE-2020-15001 Explained : Impact and Mitigation

Learn about CVE-2020-15001, an information leak vulnerability impacting Yubico YubiKey 5 NFC devices, potentially allowing unauthorized access to stored OTPs and passwords over NFC. Find mitigation steps and preventive measures here.

An information leak was discovered on Yubico YubiKey 5 NFC devices, potentially exposing stored OTPs and passwords over NFC.

Understanding CVE-2020-15001

What is CVE-2020-15001?

CVE-2020-15001 is an information leak vulnerability affecting Yubico YubiKey 5 NFC devices.

The Impact of CVE-2020-15001

The vulnerability allows an attacker to access configured OTPs and passwords stored in slots that were not configured by the user over NFC.

Technical Details of CVE-2020-15001

Vulnerability Description

        YubiKey 5 NFC devices versions 5.0.0 to 5.2.6 and 5.3.0 to 5.3.1 are affected.
        The OTP application allows setting optional access codes on OTP slots, but these codes are not checked when updating NFC-specific components, potentially leading to unauthorized access.

Affected Systems and Versions

        Yubico YubiKey 5 NFC devices versions 5.0.0 to 5.2.6 and 5.3.0 to 5.3.1

Exploitation Mechanism

        Attackers can exploit the lack of access code verification to read configured OTPs and passwords over NFC.

Mitigation and Prevention

Immediate Steps to Take

        Update YubiKey 5 NFC devices to the latest firmware version.
        Avoid configuring OTP slots if not necessary.

Long-Term Security Practices

        Regularly check for security advisories from Yubico.
        Implement access codes on OTP slots to enhance security.

Patching and Updates

        Apply patches and firmware updates provided by Yubico to address the vulnerability.

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