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Ubuntu Security Notice USN-4015-2

Ubuntu Security Notice USN-4015-2
Posted Jun 12, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4015-2 - USN-4015-1 fixed a vulnerability in DBus. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. 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. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2019-12749
MD5 | 858566474c9d65682eb11736fb49e199

Ubuntu Security Notice USN-4015-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4015-2
June 12, 2019

dbus vulnerability
==========================================================================

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

DBus could allow unintended access to services.

Software Description:
- dbus: simple interprocess messaging system

Details:

USN-4015-1 fixed a vulnerability in DBus. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory 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.

Update instructions:

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

Ubuntu 14.04 ESM:
dbus 1.6.18-0ubuntu4.5+esm1
libdbus-1-3 1.6.18-0ubuntu4.5+esm1

Ubuntu 12.04 ESM:
dbus 1.4.18-1ubuntu1.9
libdbus-1-3 1.4.18-1ubuntu1.9

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

References:
https://usn.ubuntu.com/4015-2
https://usn.ubuntu.com/4015-1
CVE-2019-12749

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