Total vulnerabilities in the database
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.
| Software | From | Fixed in |
|---|---|---|
| arm / mbed_tls | 2.16.0 | 2.16.6 |
| arm / mbed_tls | 2.7.0 | 2.7.15 |
| fedoraproject / fedora | 31 | 31.x |
| fedoraproject / fedora | 32 | 32.x |
| debian / debian_linux | 10.0 | 10.0.x |