YubiKey 5 Series devices vulnerable to ECDSA secret-key extraction attack
CVE-2024-45678

4.2MEDIUM

Key Information:

Vendor

Yubico

Status
Yubikey 5c Nfc Firmware
Vendor
CVE Published:
3 September 2024

What is CVE-2024-45678?

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.

References

https://www.yubico.com/support/security-advisories/ysa-20...
https://support.yubico.com/hc/en-us/articles/15705749884444
https://ninjalab.io/eucleak/

CVSS V3.1

Score:
4.2
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Physical
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

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