libgcrypt: Key Extraction Side Channel (CVE-2018-0495)
Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache
side-channel attack on ECDSA signatures that can be mitigated through
the use of
blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP.
To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.
(from redmine: issue id 9002, created on 2018-06-14, closed on 2018-06-21)