{"id":"CVE-2018-7559","details":"An issue was discovered in OPC UA .NET Standard Stack and Sample Code before GitHub commit 2018-04-12, and OPC UA .NET Legacy Stack and Sample Code before GitHub commit 2018-03-13. A vulnerability in OPC UA applications can allow a remote attacker to determine a Server's private key by sending carefully constructed bad UserIdentityTokens as part of an oracle attack.","aliases":["GHSA-gr4c-5rq6-cgh3"],"modified":"2026-05-17T11:55:10.974559355Z","published":"2018-06-13T18:29:00.620Z","database_specific":{"unresolved_ranges":[{"vendor_product":"opcfoundation:ua-.net-legacy","cpes":["cpe:2.3:a:opcfoundation:ua-.net-legacy:*:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"1.03.342"}],"source":"CPE_FIELD"}]},"references":[{"type":"WEB","url":"http://www.securityfocus.com/bid/108688"},{"type":"ADVISORY","url":"https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-7559.pdf"},{"type":"FIX","url":"https://github.com/OPCFoundation/UA-.NET-Legacy/commit/e2a781b38efb8686d2bd850c2f2372b5c670bc45"},{"type":"FIX","url":"https://github.com/OPCFoundation/UA-.NETStandard/commit/ebcf026a54dd0c9052cff009d96d827ac923d150"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}