Vulnerability · Published Sep 3, 2024 · Assigned by mitre
CVE-2024-45678
Medium 4.2
In plain English
A medium-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Official 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.
Affected products (as reported)
Weakness: CWE-203 · Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
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/