Description
Yubico YubiKey 5 Series devices with firmware before 5.7.0 and YubiHSM 2 devices with firmware before 2.4.0 allow an ECDSA secret-key extraction attack (that requires physical access and expensive equipment) in which an electromagnetic side channel is present because of a non-constant-time modular inversion for the Extended Euclidean Algorithm, aka the EUCLEAK issue. Other uses of an Infineon cryptographic library may also be affected.
Advisories 3
- ADVISORY2025-01_VDE-2025-001 CODESYS Key physical side-channel vulnerability CERT@VDE · Jun 5, 2025
- VDE-2025-005 Phoenix Contact: Security Advisory for ESL Stick USB-A CERT@VDE · May 14, 2025
- WID-SEC-2024-3535 IBM Security Verify Access: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Nov 24, 2024
References
- https://www.yubico.com/support/security-advisories/ysa-2024-03/
- https://support.yubico.com/hc/en-us/articles/15705749884444
- https://ninjalab.io/eucleak/
- https://ninjalab.io/wp-content/uploads/2024/09/20240903_eucleak.pdf
- https://news.ycombinator.com/item?id=41434500
- https://arstechnica.com/security/2024/09/yubikeys-are-vulnerable-to-cloning-attacks-thanks-to-newly-discovered-side-channel/