ID |
CVE-2020-10932
|
Sažetak |
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. |
Reference |
|
CVSS |
Base: | 1.9 |
Impact: | 2.9 |
Exploitability: | 3.4 |
|
Pristup |
Vektor | Složenost | Autentikacija |
LOCAL |
MEDIUM |
NONE |
|
Impact |
Povjerljivost | Cjelovitost | Dostupnost |
PARTIAL |
NONE |
NONE |
|
CVSS vektor |
AV:L/AC:M/Au:N/C:P/I:N/A:N |
Zadnje važnije ažuriranje |
03-03-2023 - 15:32 |
Objavljeno |
15-04-2020 - 14:15 |