Updated gdm3 packages has been released for Debian GNU/Linux 9

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Debian Security Advisory DSA-4270-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
August 13, 2018 https://www.debian.org/security/faq
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Package : gdm3
CVE ID : CVE-2018-14424

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

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

  GDM3 Security Update for Debian 9