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Ubuntu 19.10: USN-4134-3 Critical: IBus Local User Key Capture

ubuntu
Calendar Grey March 24, 2020
Dist Ubuntu Esm H88
An IBus flaw permits local users to intercept the keystrokes of fellow users on Ubuntu platforms. Patches for remediation are now accessible.
IBus could allow local users to capture key strokes of other locally logged in users.

Summary

IBus could allow local users to capture key strokes of other locally logged

in users.

Software Description:

- ibus: Intelligent Input Bus - core

Details:

USN-4134-1 fixed a vulnerability in IBus. The update caused a regression in

some Qt applications and the fix was subsequently reverted in

USN-4134-2. The regression has since been resolved and so this update fixes

the original vulnerability.

We apologize for the inconvenience.

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.

Topics%20covered

Topics Covered

security advisory access control DoS Ubuntu local user ibus key capture

Update Instructions

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

Ubuntu 19.10:
  ibus                            1.5.21-1~exp2ubuntu2.1

Ubuntu 18.04 LTS:
  ibus                            1.5.17-3ubuntu5.3

Ubuntu 16.04 LTS:
  ibus                            1.5.11-1ubuntu2.4

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

References

https://ubuntu.com/security/notices/USN-4134-3

https://ubuntu.com/security/notices/USN-4134-1

CVE-2019-14822

Severity
critical
Lowest
Low
Medium
High
Critical

March 24, 2020

Topics%20covered

Topics Covered

security advisory access control DoS Ubuntu local user ibus key capture

Package Information

https://launchpad.net/ubuntu/+source/ibus/1.5.17-3ubuntu5.3
https://launchpad.net/ubuntu/+source/ibus/1.5.11-1ubuntu2.4

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