VulnerabilityModified

CVE-2024-45678

MEDIUM 4.2EPSS 0.33%

Does this matter?

Lower severity and a low EPSS score (0.33%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 4.2 MEDIUMCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.33% probability · 26th percentile
CISA KEV: Not listed
Weakness: CWE-203
Affected: yubico/yubikey 5c nfc firmware · yubico/yubikey 5 nfc firmware · yubico/yubikey 5c firmware · yubico/yubikey 5 nano firmware · yubico/yubikey 5c nano firmware · yubico/yubikey 5ci firmware · yubico/yubikey 5 nfc fips firmware · yubico/yubikey 5c nfc fips firmware · yubico/yubikey 5c fips firmware · yubico/yubikey 5 nano fips firmware · yubico/yubikey 5c nano fips firmware · yubico/yubikey 5ci fips firmware · yubico/yubikey c bio firmware · yubico/yubikey bio firmware · yubico/security key nfc by yubico firmware · yubico/security key c nfc by yubico firmware · yubico/yubihsm 2 fips firmware · yubico/yubihsm 2 firmware
Source: cve@mitre.org

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.