Chris Coulson discovered a use-after-free flaw in the GNOME Display Manager, triggerable by an unprivileged user via a specially crafted sequence of D-Bus method calls, leading to denial of service or potentially the execution of arbitrary code. For the stable distribution (stretch), this problem has been fixed in version 3.22.3-3+deb9u2. We recommend that you upgrade your gdm3 packages. For the detailed security status of gdm3 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/gdm3
Chris Coulson discovered a use-after-free flaw in the GNOME Display Manager, triggerable by an unprivileged user via a specially crafted sequence of D-Bus method calls, leading to denial of service or potentially the execution of arbitrary code.
For the stable distribution (stretch), this problem has been fixed in version 3.22.3-3+deb9u2.
We recommend that you upgrade your gdm3 packages.
For the detailed security status of gdm3 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/gdm3