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.

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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
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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

Type Values Removed Values Added
Metrics epss

{'score': 0.0033}

epss

{'score': 0.00339}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: debian

Published:

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

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

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