Explain 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.
Affected Products: Libgcrypt before 1.7.10 and 1.8.x before 1.8.3
References: [{'tags': ['x_refsource_MISC'], 'url': 'https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965'}, {'name': '1041144', 'tags': ['vdb-entry', 'x_refsource_SECTRACK'], 'url': 'http://www.securitytracker.com/id/1041144'}, {'name': 'USN-3850-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3850-1/'}, {'name': '1041147', 'tags': ['vdb-entry', 'x_refsource_SECTRACK'], 'url': 'http://www.securitytracker.com/id/1041147'}, {'tags': ['x_refsource_MISC'], 'url': 'https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/'}, {'name': 'USN-3689-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3689-1/'}, {'tags': ['x_refsource_MISC'], 'url': 'https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html'}, {'name': 'USN-3689-2', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3689-2/'}, {'name': 'USN-3692-2', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3692-2/'}, {'name': '[debian-lts-announce] 20180629 [SECURITY] [DLA 1405-1] libgcrypt20 security update', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.debian.org/debian-lts-announce/2018/06/msg00013.html'}, {'name': 'DSA-4231', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'https://www.debian.org/security/2018/dsa-4231'}, {'name': 'RHSA-2018:3505', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2018:3505'}, {'name': 'USN-3850-2', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3850-2/'}, {'name': 'USN-3692-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3692-1/'}, {'name': 'RHSA-2018:3221', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2018:3221'}, {'tags': ['x_refsource_MISC'], 'url': 'https://dev.gnupg.org/T4011'}, {'tags': ['x_refsource_MISC'], 'url': 'https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html'}, {'name': 'RHSA-2019:1297', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:1297'}, {'name': 'RHSA-2019:1296', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:1296'}, {'name': 'RHSA-2019:1543', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:1543'}, {'name': 'RHSA-2019:2237', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:2237'}]
CVE State: PUBLISHED