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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.1574
                   USN-3966-1: GNOME Shell vulnerability
                                7 May 2019

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

Product:           gnome-shell
Publisher:         Ubuntu
Operating System:  Ubuntu
                   Linux variants
Impact/Access:     Unauthorised Access -- Console/Physical
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-3820  

Original Bulletin: 
   https://usn.ubuntu.com/3966-1/

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running gnome-shell check for an updated version of the software for
         their operating system.

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USN-3966-1: GNOME Shell vulnerability
6 May 2019

gnome-shell vulnerability
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 18.10
  o Ubuntu 18.04 LTS

Summary

GNOME Shell could be made to execute keyboard shortcuts and other actions while
the workstation was locked.

Software Description

  o gnome-shell - graphical shell for the GNOME desktop

Details

It was discovered that the GNOME Shell incorrectly handled certain keyboard
inputs. An attacker could possibly use this issue to invoke keyboard shortcuts,
and potentially other actions while the workstation was locked.

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 18.10
    gnome-shell - 3.30.2-0ubuntu1.18.10.2
Ubuntu 18.04 LTS
    gnome-shell - 3.28.3+git20190124-0ubuntu18.04.2

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

After a standard system update you need to reboot your computer to make all the
necessary changes.

References

  o CVE-2019-3820

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