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. It has a CVSS v3.1 base score of 4.2 (MEDIUM).

CVE-2024-45678 has a CVSS v3.1 score of 4.2 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

CVE-2024-45678 affects products from yubico, specifically: security_key_c_nfc_by_yubico, security_key_c_nfc_by_yubico_firmware, security_key_nfc_by_yubico, security_key_nfc_by_yubico_firmware, yubihsm_2, yubihsm_2_fips, yubihsm_2_fips_firmware, yubihsm_2_firmware, yubikey_5_nano, yubikey_5_nano_fips, yubikey_5_nano_fips_firmware, yubikey_5_nano_firmware, yubikey_5_nfc, yubikey_5_nfc_fips, yubikey_5_nfc_fips_firmware, yubikey_5_nfc_firmware, yubikey_5c, yubikey_5c_fips, yubikey_5c_fips_firmware, yubikey_5c_firmware, yubikey_5c_nano, yubikey_5c_nano_fips, yubikey_5c_nano_fips_firmware, yubikey_5c_nano_firmware, yubikey_5c_nfc, yubikey_5c_nfc_fips, yubikey_5c_nfc_fips_firmware, yubikey_5c_nfc_firmware, yubikey_5ci, yubikey_5ci_fips, yubikey_5ci_fips_firmware, yubikey_5ci_firmware, yubikey_bio, yubikey_bio_firmware, yubikey_c_bio, yubikey_c_bio_firmware. Check the affected products table above for specific version ranges.

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.