CVE-2018-12434

MediumCVSS 4.7/10Last modified Jun 17, 2026

Description

LibreSSL before 2.6.5 and 2.7.x before 2.7.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

Metrics

CVSS 3.0 4.7/10CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-200

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txtVendor Advisory
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txtVendor Advisory
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/Third Party Advisory
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txtVendor Advisory
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txtVendor Advisory
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/Third Party Advisory

Timeline

Published: Jun 15, 2018
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2018

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