N/A - USN-4134-2

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

USN 4134-1 introduced a regression in IBus.

Software Description: - ibus: Intelligent Input Bus - core

Details:

USN-4134-1 fixed a vulnerability in IBus. The security fix introduced a regression when being used with Qt applications. This update reverts the security fix pending further investigation.

Original advisory details:

Simon McVittie discovered that IBus did not enforce appropriate access
controls on its private D-Bus socket. A local unprivileged user who
discovers the IBus socket address of another user could exploit this to
capture the key strokes of the other user.

Update instructions:

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

Ubuntu 19.04:
ibus 1.5.19-1ubuntu2.2

Ubuntu 18.04 LTS:
ibus 1.5.17-3ubuntu5.2

Ubuntu 16.04 LTS:
ibus 1.5.11-1ubuntu2.3

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

References:
https://usn.ubuntu.com/4134-2
https://usn.ubuntu.com/4134-1
https://launchpad.net/bugs/1844853

Package Information:
https://launchpad.net/ubuntu/+source/ibus/1.5.19-1ubuntu2.2
https://launchpad.net/ubuntu/+source/ibus/1.5.17-3ubuntu5.2
https://launchpad.net/ubuntu/+source/ibus/1.5.11-1ubuntu2.3