{"id":"CVE-2018-16395","details":"An issue was discovered in the OpenSSL library in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. When two OpenSSL::X509::Name objects are compared using ==, depending on the ordering, non-equal objects may return true. When the first argument is one character longer than the second, or the second argument contains a character that is one less than a character in the same position of the first argument, the result of == will be true. This could be leveraged to create an illegitimate certificate that may be accepted as legitimate and then used in signing or encryption operations.","aliases":["GHSA-mmrq-6999-72v8"],"modified":"2026-04-10T04:06:45.501385Z","published":"2018-11-16T18:29:00.943Z","related":["MGASA-2018-0411","SUSE-SU-2019:1804-1","SUSE-SU-2020:1570-1","SUSE-SU-2022:15034-1","openSUSE-SU-2019:1771-1"],"references":[{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujan2020.html"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released/"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3729"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3731"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:1948"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2018/10/msg00020.html"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1042105"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3730"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3738"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20190221-0002/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4332"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2565"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3808-1/"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/en/news/2018/10/17/openssl-x509-name-equality-check-does-not-work-correctly-cve-2018-16395/"},{"type":"FIX","url":"https://hackerone.com/reports/387250"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ruby/openssl","events":[{"introduced":"0"},{"fixed":"08e12dd9302c1fd517c642bdd7d274e64b354c53"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"2.1.2"}]}},{"type":"GIT","repo":"https://github.com/ruby/ruby","events":[{"introduced":"d40ea2afa6ff5a6e5befcf342fb7b6dc58796b20"},{"last_affected":"9bfe7fc5cb457c7bc8df96115ee70b9035f5d885"},{"introduced":"d4bb726b713658f56e630b6cf817a0155b6f390e"},{"last_affected":"a8197e08f58c5f2e6d32a774866e0e0d58749911"},{"introduced":"4e0a512972cdcbfcd5279f1a2a81ba342ed75b6e"},{"last_affected":"85883dc393f60adc3043d28899eff3f1ce53b4a5"},{"introduced":"0"},{"last_affected":"ce0e3fc1b10d1f5c5ad6bc31ba344904345468a2"},{"introduced":"0"},{"last_affected":"6f59db30c18cd793cbf6169301158493df7e78e4"}],"database_specific":{"versions":[{"introduced":"2.3.0"},{"last_affected":"2.3.7"},{"introduced":"2.4.0"},{"last_affected":"2.4.4"},{"introduced":"2.5.0"},{"last_affected":"2.5.1"},{"introduced":"0"},{"last_affected":"2.6.0-preview1"},{"introduced":"0"},{"last_affected":"2.6.0-preview2"}]}}],"versions":["v1_0_r2","v2.0.0","v2.0.0.beta.1","v2.0.0.beta.2","v2.0.1","v2.0.2","v2.1.0","v2.1.0.beta1","v2.1.0.beta2","v2.1.1","v2_3_7","v2_4_4","v2_5_1","v2_6_0_preview1","v2_6_0_preview2"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.10"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.4"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16395.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}