The following security update has been released for Ubuntu Linux:

USN-3977-3: Intel Microcode update
USN-4023-1: Mosquitto vulnerabilities
USN-4026-1: Bind vulnerability
USN-4027-1: PostgreSQL vulnerability
USN-4028-1: Thunderbird vulnerabilities

USN-3977-3: Intel Microcode update

==========================================================================
Ubuntu Security Notice USN-3977-3
June 20, 2019

intel-microcode update
==========================================================================

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

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM

Summary:

The system could be made to expose sensitive information.

Software Description:
- intel-microcode: Processor microcode for Intel CPUs

Details:

USN-3977-1 and USN-3977-2 provided mitigations for Microarchitectural
Data Sampling (MDS) vulnerabilities in Intel Microcode for a
large number of Intel processor families. This update provides the
corresponding updated microcode mitigations for the Intel Sandy Bridge
processor family

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan
Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa
Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos,
Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss
discovered that memory previously stored in microarchitectural fill buffers
of an Intel CPU core may be exposed to a malicious process that is
executing on the same CPU core. A local attacker could use this to expose
sensitive information. (CVE-2018-12130)

Brandon Falk, Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Stephan
van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh
Razavi, Herbert Bos, and Cristiano Giuffrida discovered that memory
previously stored in microarchitectural load ports of an Intel CPU core may
be exposed to a malicious process that is executing on the same CPU core. A
local attacker could use this to expose sensitive information.
(CVE-2018-12127)

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Marina Minkin, Daniel
Moghimi, Moritz Lipp, Michael Schwarz, Jo Van Bulck, Daniel Genkin, Daniel
Gruss, Berk Sunar, Frank Piessens, and Yuval Yarom discovered that memory
previously stored in microarchitectural store buffers of an Intel CPU core
may be exposed to a malicious process that is executing on the same CPU
core. A local attacker could use this to expose sensitive information.
(CVE-2018-12126)

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Volodrmyr Pikhur,
Moritz Lipp, Michael Schwarz, Daniel Gruss, Stephan van Schaik, Alyssa
Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and
Cristiano Giuffrida discovered that uncacheable memory previously stored in
microarchitectural buffers of an Intel CPU core may be exposed to a
malicious process that is executing on the same CPU core. A local attacker
could use this to expose sensitive information. (CVE-2019-11091)

Update instructions:

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

Ubuntu 19.04:
intel-microcode 3.20190618.0ubuntu0.19.04.1

Ubuntu 18.10:
intel-microcode 3.20190618.0ubuntu0.18.10.1

Ubuntu 18.04 LTS:
intel-microcode 3.20190618.0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
intel-microcode 3.20190618.0ubuntu0.16.04.1

Ubuntu 14.04 ESM:
intel-microcode 3.20190618.0ubuntu0.14.04.1

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

References:
https://usn.ubuntu.com/3977-3
https://usn.ubuntu.com/3977-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

Package Information:
https://launchpad.net/ubuntu/+source/intel-microcode/3.20190618.0ubuntu0.19.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20190618.0ubuntu0.18.10.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20190618.0ubuntu0.18.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20190618.0ubuntu0.16.04.1

USN-4023-1: Mosquitto vulnerabilities

==========================================================================
Ubuntu Security Notice USN-4023-1
June 20, 2019

mosquitto vulnerabilities
==========================================================================

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

- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Mosquitto.

Software Description:
- mosquitto: MQTT version 3.1/3.1.1 compatible message broker

Details:

It was discovered that Mosquitto broker incorrectly handled certain specially
crafted input and network packets. A remote attacker could use this to cause a
denial of service.

Update instructions:

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

Ubuntu 18.10:
libmosquitto1 1.4.15-2ubuntu0.18.10.3
libmosquittopp1 1.4.15-2ubuntu0.18.10.3
mosquitto 1.4.15-2ubuntu0.18.10.3
mosquitto-clients 1.4.15-2ubuntu0.18.10.3

Ubuntu 18.04 LTS:
libmosquitto1 1.4.15-2ubuntu0.18.04.3
libmosquittopp1 1.4.15-2ubuntu0.18.04.3
mosquitto 1.4.15-2ubuntu0.18.04.3
mosquitto-clients 1.4.15-2ubuntu0.18.04.3

Ubuntu 16.04 LTS:
libmosquitto1 1.4.8-1ubuntu0.16.04.7
libmosquittopp1 1.4.8-1ubuntu0.16.04.7
mosquitto 1.4.8-1ubuntu0.16.04.7
mosquitto-clients 1.4.8-1ubuntu0.16.04.7

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4023-1
CVE-2017-7653, CVE-2017-7654

Package Information:
https://launchpad.net/ubuntu/+source/mosquitto/1.4.15-2ubuntu0.18.10.3
https://launchpad.net/ubuntu/+source/mosquitto/1.4.15-2ubuntu0.18.04.3
https://launchpad.net/ubuntu/+source/mosquitto/1.4.8-1ubuntu0.16.04.7

USN-4026-1: Bind vulnerability

==========================================================================
Ubuntu Security Notice USN-4026-1
June 20, 2019

bind9 vulnerability
==========================================================================

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

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS

Summary:

Bind could be made to crash if it received specially crafted network
traffic.

Software Description:
- bind9: Internet Domain Name Server

Details:

It was discovered that Bind incorrectly handled certain malformed packets.
A remote attacker could possibly use this issue to cause Bind to crash,
resulting in a denial of service.

Update instructions:

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

Ubuntu 19.04:
bind9 1:9.11.5.P1+dfsg-1ubuntu2.5

Ubuntu 18.10:
bind9 1:9.11.4+dfsg-3ubuntu5.4

Ubuntu 18.04 LTS:
bind9 1:9.11.3+dfsg-1ubuntu1.8

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4026-1
CVE-2019-6471

Package Information:
https://launchpad.net/ubuntu/+source/bind9/1:9.11.5.P1+dfsg-1ubuntu2.5
https://launchpad.net/ubuntu/+source/bind9/1:9.11.4+dfsg-3ubuntu5.4
https://launchpad.net/ubuntu/+source/bind9/1:9.11.3+dfsg-1ubuntu1.8

USN-4027-1: PostgreSQL vulnerability

==========================================================================
Ubuntu Security Notice USN-4027-1
June 20, 2019

postgresql-10, postgresql-11 vulnerability
==========================================================================

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

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS

Summary:

PostgreSQL could be made to crash or run programs if it received specially
crafted network traffic.

Software Description:
- postgresql-11: Object-relational SQL database
- postgresql-10: Object-relational SQL database

Details:

Alexander Lakhin discovered that PostgreSQL incorrectly handled
authentication. An authenticated attacker or a rogue server could use this
issue to cause PostgreSQL to crash, resulting in a denial of service, or
possibly execute arbitrary code. The default compiler options for affected
releases should reduce the vulnerability to a denial of service.

Update instructions:

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

Ubuntu 19.04:
postgresql-11 11.4-0ubuntu0.19.04.1

Ubuntu 18.10:
postgresql-10 10.9-0ubuntu0.18.10.1

Ubuntu 18.04 LTS:
postgresql-10 10.9-0ubuntu0.18.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart PostgreSQL to
make all the necessary changes.

References:
https://usn.ubuntu.com/4027-1
CVE-2019-10164

Package Information:
https://launchpad.net/ubuntu/+source/postgresql-11/11.4-0ubuntu0.19.04.1
https://launchpad.net/ubuntu/+source/postgresql-10/10.9-0ubuntu0.18.10.1
https://launchpad.net/ubuntu/+source/postgresql-10/10.9-0ubuntu0.18.04.1

USN-4028-1: Thunderbird vulnerabilities

==========================================================================
Ubuntu Security Notice USN-4028-1
June 20, 2019

thunderbird vulnerabilities
==========================================================================

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

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Thunderbird.

Software Description:
- thunderbird: Mozilla Open Source mail and newsgroup client

Details:

Multiple memory safety issues were discovered in Thunderbird. If a user
were tricked in to opening a specially crafted message, an attacker could
potentially exploit these to cause a denial of service, or execute
arbitrary code.

Update instructions:

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

Ubuntu 19.04:
  thunderbird  1:60.7.1+build1-0ubuntu0.19.04.1

Ubuntu 18.10:
  thunderbird  1:60.7.1+build1-0ubuntu0.18.10.1

Ubuntu 18.04 LTS:
  thunderbird  1:60.7.1+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  thunderbird  1:60.7.1+build1-0ubuntu0.16.04.1

After a standard system update you need to restart Thunderbird to make
all the necessary changes.

References:
  https://usn.ubuntu.com/4028-1
  CVE-2019-11703, CVE-2019-11704, CVE-2019-11705, CVE-2019-11706

Package Information:
 
https://launchpad.net/ubuntu/+source/thunderbird/1:60.7.1+build1-0ubuntu0.19.04.1
 
https://launchpad.net/ubuntu/+source/thunderbird/1:60.7.1+build1-0ubuntu0.18.10.1
 
https://launchpad.net/ubuntu/+source/thunderbird/1:60.7.1+build1-0ubuntu0.18.04.1
 
https://launchpad.net/ubuntu/+source/thunderbird/1:60.7.1+build1-0ubuntu0.16.04.1