{"id":"CVE-2018-12435","details":"Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP, related to dsa/dsa.cpp, ec_group/ec_group.cpp, and ecdsa/ecdsa.cpp. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.","modified":"2026-05-17T11:54:42.609807846Z","published":"2018-06-15T02:29:00.377Z","related":["openSUSE-SU-2024:10594-1"],"database_specific":{},"references":[{"type":"ADVISORY","url":"https://botan.randombit.net/security.html"},{"type":"FIX","url":"https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3"},{"type":"EVIDENCE","url":"https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N"}]}