CVE-2024-45678

MediumCVSS 4.2/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 4.2/10CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-203

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://arstechnica.com/security/2024/09/yubikeys-are-vulnerable-to-cloning-attacks-thanks-to-newly-discovered-side-channel/Press/Media Coverage
https://news.ycombinator.com/item?id=41434500Issue Tracking
https://ninjalab.io/eucleak/Third Party Advisory
https://ninjalab.io/wp-content/uploads/2024/09/20240903_eucleak.pdfTechnical Description
https://support.yubico.com/hc/en-us/articles/15705749884444Mitigation, Third Party Advisory
https://www.yubico.com/support/security-advisories/ysa-2024-03/Vendor Advisory

Timeline

Published: Sep 3, 2024
Last modified: Jun 17, 2026
NVD status: Modified

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