CVE-2018-0495

Public on 2018-11-07
Modified on 2020-03-18
Description
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.
Severity
Medium
CVSS v3 Base Score
5.1
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 openssl 2018-11-07 22:07 ALAS2-2018-1102
Amazon Linux 2 nss 2019-09-30 22:57 ALAS2-2019-1305
Amazon Linux 1 openssl 2018-12-05 23:20 ALAS-2018-1102
Amazon Linux 1 nspr 2020-03-16 21:29 ALAS-2020-1355
Amazon Linux 1 nss-util 2020-03-16 21:29 ALAS-2020-1355
Amazon Linux 1 nss-softokn 2020-03-16 21:29 ALAS-2020-1355
Amazon Linux 1 nss 2020-03-16 21:29 ALAS-2020-1355

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.1 CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD CVSSv2 1.9 AV:L/AC:M/Au:N/C:P/I:N/A:N
NVD CVSSv3 4.7 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N