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.
Published: 2018-06-13
Score: 4.7 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-1405-1 libgcrypt20 security update
Debian DSA Debian DSA DSA-4231-1 libgcrypt20 security update
EUVD EUVD EUVD-2018-1318 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.
Ubuntu USN Ubuntu USN USN-3689-1 Libgcrypt vulnerability
Ubuntu USN Ubuntu USN USN-3689-2 Libgcrypt vulnerability
Ubuntu USN Ubuntu USN USN-3692-1 OpenSSL vulnerabilities
Ubuntu USN Ubuntu USN USN-3692-2 OpenSSL vulnerabilities
Ubuntu USN Ubuntu USN USN-3850-1 NSS vulnerabilities
Ubuntu USN Ubuntu USN USN-3850-2 NSS vulnerabilities
History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.0033}

epss

{'score': 0.00339}


Subscriptions

Canonical Ubuntu Linux
Debian Debian Linux
Gnupg Libgcrypt
Oracle Traffic Director
Redhat Ansible Tower Enterprise Linux Enterprise Linux Desktop Enterprise Linux Server Enterprise Linux Workstation Jboss Core Services Rhel Aus Rhel E4s Rhel Eus Rhel Tus
cve-icon MITRE

Status: PUBLISHED

Assigner: debian

Published:

Updated: 2024-08-05T03:28:10.586Z

Reserved: 2017-11-27T00:00:00.000Z

Link: CVE-2018-0495

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-06-13T23:29:00.333

Modified: 2024-11-21T03:38:21.160

Link: CVE-2018-0495

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-06-13T00:00:00Z

Links: CVE-2018-0495 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses