{"id":"OESA-2022-1812","summary":"gdm security update","details":"The GNOME Display Manager is a system service that is responsible for providing graphical log-ins and managing local and remote displays, and if the session doesn't provide a display server, GDM will start the display server. It also provides initiate functionality for user-switching, so multiple users can be logged in at the same time.\r\n\r\nSecurity Fix(es):\r\n\r\nA flaw was found in GDM in versions prior to 3.38.2.1. A race condition in the handling of session shutdown makes it possible to bypass the lock screen for a user that has autologin enabled, accessing their session without authentication. This is similar to CVE-2017-12164, but requires more difficult conditions to exploit.(CVE-2020-27837)","modified":"2026-03-11T06:22:43.777479Z","published":"2022-08-05T11:04:06Z","upstream":["CVE-2020-27837"],"database_specific":{"severity":"Medium"},"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1812"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27837"}],"affected":[{"package":{"name":"gdm","ecosystem":"openEuler:20.03-LTS-SP3","purl":"pkg:rpm/openEuler/gdm&distro=openEuler-20.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.38.2.1-1.oe1"}]}],"ecosystem_specific":{"x86_64":["gdm-devel-3.38.2.1-1.oe1.x86_64.rpm","gdm-debuginfo-3.38.2.1-1.oe1.x86_64.rpm","gdm-3.38.2.1-1.oe1.x86_64.rpm","gdm-debugsource-3.38.2.1-1.oe1.x86_64.rpm"],"src":["gdm-3.38.2.1-1.oe1.src.rpm"],"aarch64":["gdm-debuginfo-3.38.2.1-1.oe1.aarch64.rpm","gdm-devel-3.38.2.1-1.oe1.aarch64.rpm","gdm-debugsource-3.38.2.1-1.oe1.aarch64.rpm","gdm-3.38.2.1-1.oe1.aarch64.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2022-1812.json"}}],"schema_version":"1.7.5"}