{"id":"CVE-2019-5885","details":"Matrix Synapse before 0.34.0.1, when the macaroon_secret_key authentication parameter is not set, uses a predictable value to derive a secret key and other secrets which could allow remote attackers to impersonate users.","aliases":["GHSA-jrqm-v8cv-53ww","PYSEC-2019-187"],"modified":"2026-05-15T12:03:55.662106394Z","published":"2019-03-21T16:01:05.843Z","related":["openSUSE-SU-2024:11041-1"],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"28"},{"last_affected":"29"}],"source":"CPE_FIELD","vendor_product":"fedoraproject:fedora"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/32Y6KD3OAHCG5P33HC2QEX3NUZOSXCGZ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMCLO5PUPBA756UKY72PKUWL4RRM4W6K/"},{"type":"ADVISORY","url":"https://matrix.org/blog/2019/01/10/critical-security-update-synapse-0-34-0-1-synapse-0-34-1-1/"},{"type":"ADVISORY","url":"https://matrix.org/blog/2019/01/15/further-details-on-critical-security-update-in-synapse-affecting-all-versions-prior-to-0-34-1-cve-2019-5885/"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}