CVSS: 6.4EPSS: 0%CPEs: 1EXPL: 0CVE-2020-27837
https://notcve.org/view.php?id=CVE-2020-27837
A 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. Se encontró un fallo en GDM en versiones anteriores a 3.38.2.1. Una condición de carrera en el manejo del cierre de sesión hace posible omitir la pantalla de bloqueo para un usuario que tiene habilitado el inicio de sesión automático accediendo a su sesión sin autenticación. • https://bugzilla.redhat.com/show_bug.cgi?id=1906812 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 7.2EPSS: 0%CPEs: 2EXPL: 3CVE-2020-16125 – gdm3 would start gnome-initial-setup if it cannot contact accountservice
https://notcve.org/view.php?id=CVE-2020-16125
gdm3 versions before 3.36.2 or 3.38.2 would start gnome-initial-setup if gdm3 can't contact the accountservice service via dbus in a timely manner; on Ubuntu (and potentially derivatives) this could be be chained with an additional issue that could allow a local user to create a new privileged account. gdm3 versiones anteriores a 3.36.2 o 3.38.2, comenzaría la configuración inicial de gnom si gdm3 no puede ponerse en contacto con el servicio de cuentas por medio de dbus de manera oportuna; en Ubuntu (y potencialmente en sus derivados) esto podría enlazarse con un problema adicional que podría permitir a un usuario local crear una nueva cuenta privilegiada A vulnerability was found in GDM. If gdm can't contact the AccountService service via DBus in a timely manner it would default to assume there are no existing users and would allow the attacker to create a new user with high privileges. • https://github.com/za970120604/CVE-2020-16125-Reproduction https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1900314 https://gitlab.gnome.org/GNOME/gdm/-/issues/642 https://securitylab.github.com/advisories/GHSL-2020-202-gdm3-LPE-unresponsive-accounts-daemon https://access.redhat.com/security/cve/CVE-2020-16125 https://bugzilla.redhat.com/show_bug.cgi?id=1901994 • CWE-636: Not Failing Securely ('Failing Open') CWE-754: Improper Check for Unusual or Exceptional Conditions •