Ubuntu 19.04, 18.10, 18.04, 16.04 LTS: 4015-1 Moderate: DBus Access Issue

ubuntu

June 11, 2019

DBus could allow unintended access to services.

Summary

DBus could allow unintended access to services.

Software Description:

- dbus: simple interprocess messaging system

Details:

Joe Vennix discovered that DBus incorrectly handled DBUS_COOKIE_SHA1

authentication. A local attacker could possibly use this issue to bypass

authentication and connect to DBus servers with elevated privileges.

Topics Covered

security advisory moderate Ubuntu local threat authentication bypass service access DBus

Update Instructions

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

Ubuntu 19.04:
  dbus                            1.12.12-1ubuntu1.1
  libdbus-1-3                     1.12.12-1ubuntu1.1

Ubuntu 18.10:
  dbus                            1.12.10-1ubuntu2.1
  libdbus-1-3                     1.12.10-1ubuntu2.1

Ubuntu 18.04 LTS:
  dbus                            1.12.2-1ubuntu1.1
  libdbus-1-3                     1.12.2-1ubuntu1.1

Ubuntu 16.04 LTS:
  dbus                            1.10.6-1ubuntu3.4
  libdbus-1-3                     1.10.6-1ubuntu3.4

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