CVE:CVE-2019-3825
CNNVD:CNNVD-201902-127
GNOME Display Manager（GDM）是一款显示管理器。
gdm 3.31.4之前版本中存在安全漏洞。攻击者可通过选择定时登录用户利用该漏洞绕过锁屏界面，获得登录用户会话的访问权限。
solution:Upgrade gnome gnome_display_manager to a higher version than 3.31.4,and avoid the version (,3.31.4); Upgrade canonical ubuntu_linux to a higher version than 18.04,18.10,and avoid the version 18.04,18.10; Upgrade redhat enterprise_linux to a higher version than 7.0,and avoid the version 7.0