What is the CVSS score of CVE-2024-45678?

CVE-2024-45678 has a CVSS 3.1 base score of 4.2 (Medium). CVSS vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.3%.

Yubikey 5C Nfc Firmware CVE-2024-45678

MEDIUM

Observable Discrepancy (CWE-203)

2024-09-03 cve@mitre.org

Information Disclosure Yubikey 5C Nfc Firmware Yubikey 5 Nfc Firmware Yubikey 5C Firmware Yubikey 5 Nano Firmware Yubikey 5C Nano Firmware Yubikey 5Ci Firmware Yubikey 5 Nfc Fips Firmware Yubikey 5C Nfc Fips Firmware Yubikey 5C Fips Firmware Yubikey 5 Nano Fips Firmware Yubikey 5C Nano Fips Firmware Yubikey 5Ci Fips Firmware Yubikey C Bio Firmware Yubikey Bio Firmware Security Key Nfc By Yubico Firmware Security Key C Nfc By Yubico Firmware Yubihsm 2 Fips Firmware Yubihsm 2 Firmware

4.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.2 MEDIUM

AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Physical

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Sep 03, 2024 - 20:15 nvd

MEDIUM 4.2

DescriptionNVD

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.

AnalysisAI

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. Rated medium severity (CVSS 4.2), this vulnerability is no authentication required. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-203. 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 include: Yubico Yubikey 5C Nfc Firmware, Yubico Yubikey 5 Nfc Firmware, Yubico Yubikey 5C Firmware, Yubico Yubikey 5 Nano Firmware, Yubico Yubikey 5C Nano Firmware. Version information: before 5.7.0.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.