{"id":"CVE-2018-12434","details":"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.","modified":"2026-07-07T08:49:47.652569050Z","published":"2018-06-15T02:29:00.330Z","related":["openSUSE-SU-2024:10985-1"],"database_specific":{"unresolved_ranges":[{"vendor_product":"openbsd:libressl","cpes":["cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:*"],"extracted_events":[{"fixed":"2.6.5"}],"source":"CPE_RANGE"},{"source":"CPE_STRING","vendor_product":"openbsd:libressl","cpes":["cpe:2.3:a:openbsd:libressl:2.7.0:*:*:*:*:*:*:*","cpe:2.3:a:openbsd:libressl:2.7.1:*:*:*:*:*:*:*","cpe:2.3:a:openbsd:libressl:2.7.2:*:*:*:*:*:*:*","cpe:2.3:a:openbsd:libressl:2.7.3:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"2.7.0"},{"last_affected":"2.7.0"},{"introduced":"2.7.1"},{"last_affected":"2.7.1"},{"introduced":"2.7.2"},{"last_affected":"2.7.2"},{"introduced":"2.7.3"},{"last_affected":"2.7.3"}]}]},"references":[{"type":"ADVISORY","url":"https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txt"},{"type":"ADVISORY","url":"https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txt"},{"type":"ADVISORY","url":"https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libressl/portable","events":[{"introduced":"0"},{"fixed":"e970fbf951f50fe164b51525e5eede32d2c82348"},{"introduced":"c22031f0fc020e6de9b2ef4de16fa10c674ec8fa"},{"fixed":"8fb8ecdf7e78afc6c22818e082bd236ec62a4bef"}],"database_specific":{"source":"DESCRIPTION","extracted_events":[{"introduced":"0"},{"fixed":"2.6.5"},{"introduced":"2.7.x"},{"fixed":"2.7.4"}]}}],"versions":["v2.7.3","v2.7.2","v2.7.1","v2.7.0","v2.6.4","v2.6.3","v2.6.2","v2.6.1","v2.6.0","v2.5.2","v2.5.1","v2.5.0","v2.4.1","v2.4.0","v2.3.2","v2.3.1","v2.3.0","v2.2.2","v2.2.1","v2.2.0","v2.1.4","v2.1.3","v2.1.2"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-12434.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}