#VU101046 Observable discrepancy in YubiKey 5 Series and YubiHSM - CVE-2024-45678
Published: November 29, 2024
Vulnerability identifier: #VU101046
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2024-45678
CWE-ID: CWE-203
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
YubiKey 5 Series
YubiHSM
YubiKey 5 Series
YubiHSM
Software vendor:
Yubico
Yubico
Description
The vulnerability allows an attacker with physical access to gain access to potentially sensitive information.
The vulnerability exists due to Yubico YubiKey 5 Series and YubiHSM 2 devices allows 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. A attacker with physical access can gain unauthorized access to sensitive information on the system.
Remediation
Install updates from vendor's website.
External links
- 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/