Ubuntu 22.10 USN-5704-1: Critical DBus Denial Of Service Advisory

ubuntu

October 27, 2022

Several security issues were fixed in DBus.

Summary

Several security issues were fixed in DBus.

Software Description:

- dbus: simple interprocess messaging system

Details:

It was discovered that DBus incorrectly handled messages with invalid type

signatures. A local attacker could possibly use this issue to cause DBus to

crash, resulting in a denial of service. (CVE-2022-42010)

It was discovered that DBus was incorrectly validating the length of arrays of

fixed-length items. A local attacker could possibly use this issue to cause

DBus to crash, resulting in a denial of service. (CVE-2022-42011)

It was discovered that DBus incorrectly handled the body DBus message with

attached file descriptors. A local attacker could possibly use this issue to

cause DBus to crash, resulting in a denial of service. (CVE-2022-42012)

Topics Covered

security advisory denial of service security issue system update ubuntu dbus

Update Instructions

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

Ubuntu 22.10:
  dbus                            1.14.0-2ubuntu3
  libdbus-1-3                     1.14.0-2ubuntu3

Ubuntu 22.04 LTS:
  dbus                            1.12.20-2ubuntu4.1
  libdbus-1-3                     1.12.20-2ubuntu4.1

Ubuntu 20.04 LTS:
  dbus                            1.12.16-2ubuntu2.3
  libdbus-1-3                     1.12.16-2ubuntu2.3

Ubuntu 18.04 LTS:
  dbus                            1.12.2-1ubuntu1.4
  libdbus-1-3                     1.12.2-1ubuntu1.4

Ubuntu 16.04 ESM:
  dbus                            1.10.6-1ubuntu3.6+esm2
  libdbus-1-3                     1.10.6-1ubuntu3.6+esm2

Ubuntu 14.04 ESM:
  dbus                            1.6.18-0ubuntu4.5+esm3
  libdbus-1-3                     1.6.18-0ubuntu4.5+esm3

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