CVE-2018-0495

ROHNP: Key Extraction Side Channel in Multiple Crypto Libraries

Published Jun 13, 2018 CVSS 3.0 · 4.7 Medium EPSS < 1% KEV · Not listed
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.

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
Type Values Removed Values Added
Metrics epss

{'score': 0.0033}

epss

{'score': 0.00339}