{"id":"DEBIAN-CVE-2019-11842","details":"An issue was discovered in Matrix Sydent before 1.0.3 and Synapse before 0.99.3.1. Random number generation is mishandled, which makes it easier for attackers to predict a Sydent authentication token or a Synapse random ID.","modified":"2026-08-11T20:02:58.736111531Z","published":"2019-05-09T18:29:07.197Z","withdrawn":"2026-08-11T20:02:58.736111383Z","upstream":["CVE-2019-11842"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2019-11842"}],"affected":[{"package":{"name":"matrix-synapse","ecosystem":"Debian:14","purl":"pkg:deb/debian/matrix-synapse?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.99.2-5"}]}],"versions":["0.19.2+dfsg-3","0.19.2+dfsg-4","0.19.2+dfsg-5","0.19.2+dfsg-6","0.24.0+dfsg-1","0.27.2+dfsg-1","0.28.0+dfsg-1","0.28.0+dfsg-2","0.28.1+dfsg-1","0.29.1+dfsg-1","0.30.0+dfsg-1","0.31.0+dfsg-1","0.31.0+dfsg-2","0.31.1+dfsg-1","0.31.1+dfsg-2","0.31.2+dfsg-1","0.32.2+dfsg-1","0.33.0+dfsg-1","0.33.1+dfsg-1","0.33.2+dfsg-1","0.33.2+dfsg-2","0.33.2+dfsg-3","0.33.3-1","0.33.3-2","0.33.3.1-1","0.33.4-1","0.33.4-1~bpo9+1","0.33.8-1","0.33.9-2","0.33.9-2~bpo9+1","0.34.0-1","0.34.0-2","0.34.0-3","0.34.0-3~bpo9+1","0.34.0-3~bpo9+2","0.34.0~rc2-1","0.34.1.1-1","0.34.1.1-2","0.34.1.1-2~bpo9+1","0.34.1.1-3","0.34.1.1-3~bpo9+1","0.34.1.1-3~bpo9+2","0.34.1.1-4","0.99.0-1","0.99.0-1~bpo9+1","0.99.0-1~bpo9+2","0.99.0-1~bpo9+3","0.99.1.1-1","0.99.2-1","0.99.2-1~bpo9+1","0.99.2-1~bpo9+2","0.99.2-2","0.99.2-3","0.99.2-4","0.99.2-5~bpo9+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2019-11842.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:N/A:N"}]}