ESB-2018.2638 - [Debian] gdm3: Execute arbitrary code/commands - Existing account 2018-09-06

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2638
                           gdm3 security update
                             6 September 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           gdm3
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-14424  

Reference:         ESB-2018.2533
                   ESB-2018.2320
                   ESB-2018.2318

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2018/09/msg00003.html

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Package        : gdm3
Version        : 3.14.1-7+deb8u1
CVE ID         : CVE-2018-14424

The daemon in GDM does not properly unexport display objects from its
D-Bus interface when they are destroyed, which allows a local attacker
to trigger a use-after-free via a specially crafted sequence of D-Bus
method calls, resulting in a denial of service or potential code
execution.

For Debian 8 "Jessie", this problem has been fixed in version
3.14.1-7+deb8u1.

We recommend that you upgrade your gdm3 packages.

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

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