{"id":"ALPINE-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":"2026-11-03T06:32:25.534798708Z","published":"2020-11-04T19:15:12.137Z","upstream":["CVE-2020-28049"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2020-28049"}],"affected":[{"package":{"name":"sddm","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}},{"package":{"name":"sddm","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/sddm?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.19.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-28049.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}