{"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":"2026-08-27T08:14:29.552401Z","published":"2018-06-13T18:29:00.620Z","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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/OPCF-Members/UA-.NET-Legacy","events":[{"introduced":"0"},{"last_affected":"4011cb43d40b9b3259b25a223a9923da38ea7ea1"}],"database_specific":{"cpe":"cpe:2.3:a:opcfoundation:ua-.net-legacy:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"1.03.342"}],"source":"CPE_RANGE"}}],"versions":["1.03.342","1.03.341","1.03.340","1.02.336"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-7559.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/opcf-members/ua-.net-legacy","events":[{"introduced":"0"},{"fixed":"e2a781b38efb8686d2bd850c2f2372b5c670bc45"}],"database_specific":{"source":"REFERENCES"}}],"versions":["1.03.341","1.03.340","1.02.336"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-7559.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/opcfoundation/ua-.netstandard","events":[{"introduced":"0"},{"last_affected":"33dab7e876e3f273d43ffa4c08552814fd7778d0"},{"fixed":"ebcf026a54dd0c9052cff009d96d827ac923d150"}],"database_specific":{"cpe":"cpe:2.3:a:opcfoundation:ua-.netstandard:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"1.03.352.10"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["1.03.352.10","1.03.351.7","1.03.350.6","1.03.350"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-7559.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}