CVSS 4.7 · Medium EPSS 0,25%
Kerentanan Observable Discrepancy pada arm mbed tls, trustedfirmware mbed tls +2 lainnya. Skor CVSS 3.1 4.7 (Medium) menurut NVD.
An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15. An attacker that can get precise enough side-channel measurements can recover the long-term ECDSA private key by (1) reconstructing the projective coordinate of the result of scalar multiplication by exploiting side channels in the conversion to affine coordinates; (2) using an attack described by Naccache, Smart, and Stern in 2003 to recover a few bits of the ephemeral scalar from those projective coordinates via several measurements; and (3) using a lattice attack to get from there to the long-term ECDSA private key used for the signatures. Typically an attacker would have sufficient access when attacking an SGX enclave and controlling the untrusted OS.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| arm | mbed tls | Versi 2.7.0 hingga sebelum 2.7.15 |
| trustedfirmware | mbed tls | Versi 2.16.0 hingga sebelum 2.16.6 |
| fedoraproject | fedora | Versi 31 |
| fedoraproject | fedora | Versi 32 |
| debian | debian linux | Versi 10.0 |