{"id":"CVE-2020-28049","details":"An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents and, for example, intercept keystrokes or access the clipboard. This is caused by a race condition during Xauthority file creation.","modified":"2026-04-16T04:32:43.650492898Z","published":"2020-11-04T19:15:12.137Z","related":["openSUSE-SU-2020:1870-1","openSUSE-SU-2020:1899-1","openSUSE-SU-2024:11376-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GT3EX5NSQJJAKY63ENSMEDX6NYZLYY3S/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202402-02"},{"type":"ADVISORY","url":"https://www.debian.org/security/2020/dsa-4783"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00031.html"},{"type":"ADVISORY","url":"https://github.com/sddm/sddm/blob/v0.19.0/ChangeLog"},{"type":"ADVISORY","url":"https://github.com/sddm/sddm/releases"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/11/msg00009.html"},{"type":"REPORT","url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-28049"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sddm/sddm","events":[{"introduced":"0"},{"fixed":"c5e7043291a6d237e33c2f666d9937c93d668594"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"0.19.0"}]}}],"versions":["v0.1.0","v0.11.0","v0.12.0","v0.13.0","v0.14.0","v0.17.0","v0.18.0","v0.8.99","v0.9.0"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"15.2"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"33"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28049.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}