{"id":"CVE-2019-3878","details":"A vulnerability was found in mod_auth_mellon before v0.14.2. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication.","modified":"2026-03-20T11:30:10.774312Z","published":"2019-03-26T18:29:00.983Z","references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHBA-2019:0959"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0746"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0766"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0985"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3924-1/"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878"},{"type":"FIX","url":"https://github.com/Uninett/mod_auth_mellon/pull/196"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/uninett/mod_auth_mellon","events":[{"introduced":"0"},{"fixed":"7d681177cb23253e1136afd18cb1916f3865554e"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"0.14.2"}]}}],"versions":["v0.10.0","v0.11.0","v0.12.0","v0.13.0","v0.13.1","v0.14.0","v0.14.1","v0.4.0","v0.5.0","v0.6.0","v0.6.0-rc1","v0.6.1","v0.7.0","v0.8.0","v0.9.0","v0.9.1"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"29"}]},{"events":[{"introduced":"0"},{"last_affected":"30"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.6"}]},{"events":[{"introduced":"0"},{"last_affected":"7.6"}]},{"events":[{"introduced":"0"},{"last_affected":"7.6"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.10"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-3878.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}