Samba, Intel Microcode, QEMU, Linux Kernel Updates for Ubuntu
Posted on: 05/15/2019 06:27 AM

The following security updates has been released for Ubuntu Linux:

USN-3976-1: Samba vulnerability
USN-3976-2: Samba vulnerability
USN-3977-1: Intel Microcode update
USN-3978-1: QEMU update
USN-3979-1: Linux kernel vulnerabilities
USN-3980-1: Linux kernel vulnerabilities
USN-3980-2: Linux kernel (HWE) vulnerabilities
USN-3981-1: Linux kernel vulnerabilities
USN-3981-2: Linux kernel (HWE) vulnerabilities
USN-3982-1: Linux kernel vulnerabilities
USN-3982-2: Linux kernel (Xenial HWE) vulnerabilities
USN-3983-1: Linux kernel vulnerabilities
USN-3983-2: Linux kernel (Trusty HWE) vulnerabilities
USN-3984-1: Linux kernel vulnerabilities

USN-3976-1: Samba vulnerability

==========================================================================
Ubuntu Security Notice USN-3976-1
May 14, 2019

samba vulnerability
==========================================================================

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:

Samba could allow unintended access to network services.

Software Description:
- samba: SMB/CIFS file, print, and login server for Unix

Details:

Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly
use this issue to escalate privileges.

Update instructions:

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

Ubuntu 19.04:
samba 2:4.10.0+dfsg-0ubuntu2.1

Ubuntu 18.10:
samba 2:4.8.4+dfsg-2ubuntu2.4

Ubuntu 18.04 LTS:
samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.10

Ubuntu 16.04 LTS:
samba 2:4.3.11+dfsg-0ubuntu0.16.04.20

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

References:
https://usn.ubuntu.com/usn/usn-3976-1
CVE-2018-16860

Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.10.0+dfsg-0ubuntu2.1
https://launchpad.net/ubuntu/+source/samba/2:4.8.4+dfsg-2ubuntu2.4
https://launchpad.net/ubuntu/+source/samba/2:4.7.6+dfsg~ubuntu-0ubuntu2.10
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.20


USN-3976-2: Samba vulnerability

==========================================================================
Ubuntu Security Notice USN-3976-2
May 14, 2019

samba vulnerability
==========================================================================

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

Samba could allow unintended access to network services.

Software Description:
- samba: SMB/CIFS file, print, and login server for Unix

Details:

USN-3976-1 fixed a vulnerability in Samba. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

 Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly
 checked S4U2Self packets. In certain environments, a remote attacker
 could possibly use this issue to escalate privileges.

Update instructions:

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

Ubuntu 14.04 ESM:
  samba 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm1

Ubuntu 12.04 ESM:
  samba 2:3.6.25-0ubuntu0.12.04.18

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

References:
  https://usn.ubuntu.com/usn/usn-3976-2
  https://usn.ubuntu.com/usn/usn-3976-1
  CVE-2018-16860


USN-3977-1: Intel Microcode update

==========================================================================
Ubuntu Security Notice USN-3977-1
May 14, 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:

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 3.20190514.0ubuntu0.19.04.1

Ubuntu 18.10:
intel-microcode 3.20190514.0ubuntu0.18.10.1

Ubuntu 18.04 LTS:
intel-microcode 3.20190514.0ubuntu0.18.04.2

Ubuntu 16.04 LTS:
intel-microcode 3.20190514.0ubuntu0.16.04.1

Ubuntu 14.04 ESM:
intel-microcode 3.20190514.0ubuntu0.14.04.1

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

References:
https://usn.ubuntu.com/usn/usn-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/3.20190514.0ubuntu0.19.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20190514.0ubuntu0.18.10.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20190514.0ubuntu0.18.04.2
https://launchpad.net/ubuntu/+source/intel-microcode/3.20190514.0ubuntu0.16.04.1


USN-3978-1: QEMU update

==========================================================================
Ubuntu Security Notice USN-3978-1
May 14, 2019

qemu 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:

Several issues were addressed in QEMU.

Software Description:
- qemu: Machine emulator and virtualizer

Details:

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)

Kurtis Miller discovered that a buffer overflow existed in QEMU when
loading a device tree blob. A local attacker could use this to execute
arbitrary code. (CVE-2018-20815)

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)

It was discovered that a NULL pointer dereference existed in the sun4u
power device implementation in QEMU. A local attacker could use this
to cause a denial of service. This issue only affected Ubuntu 18.10
and Ubuntu 19.04. (CVE-2019-5008)

William Bowling discovered that an information leak existed in the SLiRP
networking implementation of QEMU. An attacker could use this to expose
sensitive information. (CVE-2019-9824)

Update instructions:

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

Ubuntu 19.04:
qemu 1:3.1+dfsg-2ubuntu3.1
qemu-system-x86 1:3.1+dfsg-2ubuntu3.1

Ubuntu 18.10:
qemu 1:2.12+dfsg-3ubuntu8.7
qemu-system-x86 1:2.12+dfsg-3ubuntu8.7

Ubuntu 18.04 LTS:
qemu 1:2.11+dfsg-1ubuntu7.13
qemu-system-x86 1:2.11+dfsg-1ubuntu7.13

Ubuntu 16.04 LTS:
qemu 1:2.5+dfsg-5ubuntu10.38
qemu-system-x86 1:2.5+dfsg-5ubuntu10.38

Ubuntu 14.04 ESM:
qemu 2.0.0+dfsg-2ubuntu1.46
qemu-system-x86 2.0.0+dfsg-2ubuntu1.46

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3978-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2018-20815,
CVE-2019-11091, CVE-2019-5008, CVE-2019-9824,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

Package Information:
https://launchpad.net/ubuntu/+source/qemu/1:3.1+dfsg-2ubuntu3.1
https://launchpad.net/ubuntu/+source/qemu/1:2.12+dfsg-3ubuntu8.7
https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.13
https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu10.38

USN-3979-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3979-1
May 14, 2019

linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities
==========================================================================

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

- Ubuntu 19.04

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

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)

It was discovered that the IPv4 generic receive offload (GRO) for UDP
implementation in the Linux kernel did not properly handle padded packets.
A remote attacker could use this to cause a denial of service (system
crash). (CVE-2019-11683)

It was discovered that a race condition existed in the Binder IPC driver
for the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2019-1999)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups
subsystem of the Linux kernel did not properly account for SCTP socket
buffers. A local attacker could use this to cause a denial of service
(system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did
not properly limit DMA mappings. A local attacker could use this to cause a
denial of service (memory exhaustion). (CVE-2019-3882)

Marc Orr discovered that the KVM hypervisor implementation in the Linux
kernel did not properly restrict APIC MSR register values when nested
virtualization is used. An attacker in a guest vm could use this to cause a
denial of service (host OS crash). (CVE-2019-3887)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel contained a head puffer overflow. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-9500)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel did not properly prevent remote firmware events from being processed
for USB Wifi devices. A physically proximate attacker could use this to
send firmware events to the device. (CVE-2019-9503)

Update instructions:

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

Ubuntu 19.04:
linux-image-5.0.0-1006-aws 5.0.0-1006.6
linux-image-5.0.0-1006-azure 5.0.0-1006.6
linux-image-5.0.0-1006-gcp 5.0.0-1006.6
linux-image-5.0.0-1006-kvm 5.0.0-1006.6
linux-image-5.0.0-1008-raspi2 5.0.0-1008.8
linux-image-5.0.0-15-generic 5.0.0-15.16
linux-image-5.0.0-15-generic-lpae 5.0.0-15.16
linux-image-5.0.0-15-lowlatency 5.0.0-15.16
linux-image-aws 5.0.0.1006.6
linux-image-azure 5.0.0.1006.6
linux-image-gcp 5.0.0.1006.6
linux-image-generic 5.0.0.15.16
linux-image-generic-lpae 5.0.0.15.16
linux-image-gke 5.0.0.1006.6
linux-image-kvm 5.0.0.1006.6
linux-image-lowlatency 5.0.0.15.16
linux-image-raspi2 5.0.0.1008.5
linux-image-virtual 5.0.0.15.16

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3979-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091,
CVE-2019-11683, CVE-2019-1999, CVE-2019-3874, CVE-2019-3882,
CVE-2019-3887, CVE-2019-9500, CVE-2019-9503,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.0.0-15.16
https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1006.6
https://launchpad.net/ubuntu/+source/linux-azure/5.0.0-1006.6
https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1006.6
https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1006.6
https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1008.8


USN-3980-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3980-1
May 14, 2019

linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities
==========================================================================

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

- Ubuntu 18.10

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

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)

Vasily Averin and Evgenii Shatokhin discovered that a use-after-free
vulnerability existed in the NFS41+ subsystem when multiple network
namespaces are in use. A local attacker in a container could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-16884)

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)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups
subsystem of the Linux kernel did not properly account for SCTP socket
buffers. A local attacker could use this to cause a denial of service
(system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did
not properly limit DMA mappings. A local attacker could use this to cause a
denial of service (memory exhaustion). (CVE-2019-3882)

Marc Orr discovered that the KVM hypervisor implementation in the Linux
kernel did not properly restrict APIC MSR register values when nested
virtualization is used. An attacker in a guest vm could use this to cause a
denial of service (host OS crash). (CVE-2019-3887)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel contained a head puffer overflow. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-9500)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel did not properly prevent remote firmware events from being processed
for USB Wifi devices. A physically proximate attacker could use this to
send firmware events to the device. (CVE-2019-9503)

Update instructions:

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

Ubuntu 18.10:
linux-image-4.18.0-1011-gcp 4.18.0-1011.12
linux-image-4.18.0-1012-kvm 4.18.0-1012.12
linux-image-4.18.0-1014-raspi2 4.18.0-1014.16
linux-image-4.18.0-1016-aws 4.18.0-1016.18
linux-image-4.18.0-1018-azure 4.18.0-1018.18
linux-image-4.18.0-20-generic 4.18.0-20.21
linux-image-4.18.0-20-generic-lpae 4.18.0-20.21
linux-image-4.18.0-20-lowlatency 4.18.0-20.21
linux-image-4.18.0-20-snapdragon 4.18.0-20.21
linux-image-aws 4.18.0.1016.16
linux-image-azure 4.18.0.1018.19
linux-image-gcp 4.18.0.1011.11
linux-image-generic 4.18.0.20.21
linux-image-generic-lpae 4.18.0.20.21
linux-image-gke 4.18.0.1011.11
linux-image-kvm 4.18.0.1012.12
linux-image-lowlatency 4.18.0.20.21
linux-image-powerpc-e500mc 4.18.0.20.21
linux-image-powerpc-smp 4.18.0.20.21
linux-image-powerpc64-emb 4.18.0.20.21
linux-image-powerpc64-smp 4.18.0.20.21
linux-image-raspi2 4.18.0.1014.11
linux-image-snapdragon 4.18.0.20.21
linux-image-virtual 4.18.0.20.21

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3980-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2018-16884,
CVE-2019-11091, CVE-2019-3874, CVE-2019-3882, CVE-2019-3887,
CVE-2019-9500, CVE-2019-9503,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.18.0-20.21
https://launchpad.net/ubuntu/+source/linux-aws/4.18.0-1016.18
https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1018.18
https://launchpad.net/ubuntu/+source/linux-gcp/4.18.0-1011.12
https://launchpad.net/ubuntu/+source/linux-kvm/4.18.0-1012.12
https://launchpad.net/ubuntu/+source/linux-raspi2/4.18.0-1014.16


USN-3980-2: Linux kernel (HWE) vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3980-2
May 14, 2019

linux-hwe, linux-azure vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

USN-3980-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10.
This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.10 for Ubuntu
18.04 LTS.

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)

Vasily Averin and Evgenii Shatokhin discovered that a use-after-free
vulnerability existed in the NFS41+ subsystem when multiple network
namespaces are in use. A local attacker in a container could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-16884)

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)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups
subsystem of the Linux kernel did not properly account for SCTP socket
buffers. A local attacker could use this to cause a denial of service
(system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did
not properly limit DMA mappings. A local attacker could use this to cause a
denial of service (memory exhaustion). (CVE-2019-3882)

Marc Orr discovered that the KVM hypervisor implementation in the Linux
kernel did not properly restrict APIC MSR register values when nested
virtualization is used. An attacker in a guest vm could use this to cause a
denial of service (host OS crash). (CVE-2019-3887)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel contained a heap buffer overflow. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-9500)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel did not properly prevent remote firmware events from being processed
for USB Wifi devices. A physically proximate attacker could use this to
send firmware events to the device. (CVE-2019-9503)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.18.0-1018-azure 4.18.0-1018.18~18.04.1
linux-image-4.18.0-20-generic 4.18.0-20.21~18.04.1
linux-image-4.18.0-20-generic-lpae 4.18.0-20.21~18.04.1
linux-image-4.18.0-20-lowlatency 4.18.0-20.21~18.04.1
linux-image-4.18.0-20-snapdragon 4.18.0-20.21~18.04.1
linux-image-azure 4.18.0.1018.17
linux-image-generic-hwe-18.04 4.18.0.20.70
linux-image-generic-lpae-hwe-18.04 4.18.0.20.70
linux-image-lowlatency-hwe-18.04 4.18.0.20.70
linux-image-snapdragon-hwe-18.04 4.18.0.20.70
linux-image-virtual-hwe-18.04 4.18.0.20.70

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3980-2
https://usn.ubuntu.com/usn/usn-3980-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130,
CVE-2018-16884, CVE-2019-11091, CVE-2019-3874,
CVE-2019-3882, CVE-2019-3887, CVE-2019-9500, CVE-2019-9503,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

Package Information:
https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1018.18~18.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.18.0-20.21~18.04.1


USN-3981-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3981-1
May 14, 2019

linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-oracle,
linux-raspi2, linux-snapdragon vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oem: Linux kernel for OEM processors
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi2: Linux kernel for Raspberry Pi 2
- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

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)

Vasily Averin and Evgenii Shatokhin discovered that a use-after-free
vulnerability existed in the NFS41+ subsystem when multiple network
namespaces are in use. A local attacker in a container could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-16884)

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)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups
subsystem of the Linux kernel did not properly account for SCTP socket
buffers. A local attacker could use this to cause a denial of service
(system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did
not properly limit DMA mappings. A local attacker could use this to cause a
denial of service (memory exhaustion). (CVE-2019-3882)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel contained a heap buffer overflow. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-9500)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel did not properly prevent remote firmware events from being processed
for USB Wifi devices. A physically proximate attacker could use this to
send firmware events to the device. (CVE-2019-9503)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-1013-oracle 4.15.0-1013.15
linux-image-4.15.0-1032-gcp 4.15.0-1032.34
linux-image-4.15.0-1034-kvm 4.15.0-1034.34
linux-image-4.15.0-1036-raspi2 4.15.0-1036.38
linux-image-4.15.0-1038-oem 4.15.0-1038.43
linux-image-4.15.0-1039-aws 4.15.0-1039.41
linux-image-4.15.0-1053-snapdragon 4.15.0-1053.57
linux-image-4.15.0-50-generic 4.15.0-50.54
linux-image-4.15.0-50-generic-lpae 4.15.0-50.54
linux-image-4.15.0-50-lowlatency 4.15.0-50.54
linux-image-4.15.0-50-snapdragon 4.15.0-50.54
linux-image-aws 4.15.0.1039.38
linux-image-gcp 4.15.0.1032.34
linux-image-generic 4.15.0.50.52
linux-image-generic-lpae 4.15.0.50.52
linux-image-kvm 4.15.0.1034.34
linux-image-lowlatency 4.15.0.50.52
linux-image-oem 4.15.0.1038.43
linux-image-oracle 4.15.0.1013.16
linux-image-powerpc-e500mc 4.15.0.50.52
linux-image-powerpc-smp 4.15.0.50.52
linux-image-powerpc64-emb 4.15.0.50.52
linux-image-powerpc64-smp 4.15.0.50.52
linux-image-raspi2 4.15.0.1036.34
linux-image-snapdragon 4.15.0.1053.56
linux-image-virtual 4.15.0.50.52

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:

https://usn.ubuntu.com/usn/usn-3981-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130,
CVE-2018-16884, CVE-2019-11091, CVE-2019-3874,
CVE-2019-3882, CVE-2019-9500, CVE-2019-9503,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-50.54
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1039.41
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1032.34
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1034.34
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1038.43
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1013.15
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1036.38
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1053.57

USN-3981-2: Linux kernel (HWE) vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3981-2
May 15, 2019

linux-hwe, linux-azure, linux-gcp, linux-oracle vulnerabilities
==========================================================================

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

- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel
- linux-oracle: Linux kernel for Oracle Cloud systems

Details:

USN-3981-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS and for the Linux Azure kernel for Ubuntu 14.04 LTS.

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)

Vasily Averin and Evgenii Shatokhin discovered that a use-after-free
vulnerability existed in the NFS41+ subsystem when multiple network
namespaces are in use. A local attacker in a container could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-16884)

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)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups
subsystem of the Linux kernel did not properly account for SCTP socket
buffers. A local attacker could use this to cause a denial of service
(system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did
not properly limit DMA mappings. A local attacker could use this to cause a
denial of service (memory exhaustion). (CVE-2019-3882)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel contained a heap buffer overflow. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-9500)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel did not properly prevent remote firmware events from being processed
for USB Wifi devices. A physically proximate attacker could use this to
send firmware events to the device. (CVE-2019-9503)

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.15.0-1013-oracle 4.15.0-1013.15~16.04.1
linux-image-4.15.0-1032-gcp 4.15.0-1032.34~16.04.1
linux-image-4.15.0-1045-azure 4.15.0-1045.49
linux-image-4.15.0-50-generic 4.15.0-50.54~16.04.1
linux-image-4.15.0-50-generic-lpae 4.15.0-50.54~16.04.1
linux-image-4.15.0-50-lowlatency 4.15.0-50.54~16.04.1
linux-image-azure 4.15.0.1045.49
linux-image-gcp 4.15.0.1032.46
linux-image-generic-hwe-16.04 4.15.0.50.71
linux-image-generic-lpae-hwe-16.04 4.15.0.50.71
linux-image-gke 4.15.0.1032.46
linux-image-lowlatency-hwe-16.04 4.15.0.50.71
linux-image-oem 4.15.0.50.71
linux-image-oracle 4.15.0.1013.7
linux-image-virtual-hwe-16.04 4.15.0.50.71

Ubuntu 14.04 ESM:
linux-image-4.15.0-1045-azure 4.15.0-1045.49~14.04.1
linux-image-azure 4.15.0.1045.32

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3981-2
https://usn.ubuntu.com/usn/usn-3981-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130,
CVE-2018-16884, CVE-2019-11091, CVE-2019-3874,
CVE-2019-3882, CVE-2019-9500, CVE-2019-9503,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

Package Information:
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1045.49
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1032.34~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-50.54~16.04.1
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1013.15~16.04.1

USN-3982-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3982-1
May 14, 2019

linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
==========================================================================

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

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-kvm: Linux kernel for cloud environments
- linux-raspi2: Linux kernel for Raspberry Pi 2
- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

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)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups
subsystem of the Linux kernel did not properly account for SCTP socket
buffers. A local attacker could use this to cause a denial of service
(system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did
not properly limit DMA mappings. A local attacker could use this to cause a
denial of service (memory exhaustion). (CVE-2019-3882)

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.4.0-1046-kvm 4.4.0-1046.52
linux-image-4.4.0-1083-aws 4.4.0-1083.93
linux-image-4.4.0-1109-raspi2 4.4.0-1109.117
linux-image-4.4.0-1113-snapdragon 4.4.0-1113.118
linux-image-4.4.0-148-generic 4.4.0-148.174
linux-image-4.4.0-148-generic-lpae 4.4.0-148.174
linux-image-4.4.0-148-lowlatency 4.4.0-148.174
linux-image-4.4.0-148-powerpc-e500mc 4.4.0-148.174
linux-image-4.4.0-148-powerpc-smp 4.4.0-148.174
linux-image-4.4.0-148-powerpc64-emb 4.4.0-148.174
linux-image-4.4.0-148-powerpc64-smp 4.4.0-148.174
linux-image-aws 4.4.0.1083.86
linux-image-generic 4.4.0.148.156
linux-image-generic-lpae 4.4.0.148.156
linux-image-kvm 4.4.0.1046.46
linux-image-lowlatency 4.4.0.148.156
linux-image-powerpc-e500mc 4.4.0.148.156
linux-image-powerpc-smp 4.4.0.148.156
linux-image-powerpc64-emb 4.4.0.148.156
linux-image-powerpc64-smp 4.4.0.148.156
linux-image-raspi2 4.4.0.1109.109
linux-image-snapdragon 4.4.0.1113.105
linux-image-virtual 4.4.0.148.156

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3982-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091,
CVE-2019-3874, CVE-2019-3882,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-148.174
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1083.93
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1046.52
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1109.117
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1113.118


USN-3982-2: Linux kernel (Xenial HWE) vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3982-2
May 14, 2019

linux-lts-xenial vulnerabilities
==========================================================================

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

- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-3982-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 for Ubuntu
14.04 LTS.

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)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups
subsystem of the Linux kernel did not properly account for SCTP socket
buffers. A local attacker could use this to cause a denial of service
(system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did
not properly limit DMA mappings. A local attacker could use this to cause a
denial of service (memory exhaustion). (CVE-2019-3882)

Update instructions:

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

Ubuntu 14.04 ESM:
linux-image-4.4.0-148-generic 4.4.0-148.174~14.04.1
linux-image-4.4.0-148-generic-lpae 4.4.0-148.174~14.04.1
linux-image-4.4.0-148-lowlatency 4.4.0-148.174~14.04.1
linux-image-4.4.0-148-powerpc-e500mc 4.4.0-148.174~14.04.1
linux-image-4.4.0-148-powerpc-smp 4.4.0-148.174~14.04.1
linux-image-4.4.0-148-powerpc64-emb 4.4.0-148.174~14.04.1
linux-image-4.4.0-148-powerpc64-smp 4.4.0-148.174~14.04.1
linux-image-generic-lpae-lts-xenial 4.4.0.148.130
linux-image-generic-lts-xenial 4.4.0.148.130
linux-image-lowlatency-lts-xenial 4.4.0.148.130
linux-image-powerpc-e500mc-lts-xenial 4.4.0.148.130
linux-image-powerpc-smp-lts-xenial 4.4.0.148.130
linux-image-powerpc64-emb-lts-xenial 4.4.0.148.130
linux-image-powerpc64-smp-lts-xenial 4.4.0.148.130
linux-image-virtual-lts-xenial 4.4.0.148.130

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3982-2
https://usn.ubuntu.com/usn/usn-3982-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130,
CVE-2019-11091, CVE-2019-3874, CVE-2019-3882,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

USN-3983-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3983-1
May 14, 2019

linux vulnerabilities
==========================================================================

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

- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

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 14.04 ESM:
linux-image-3.13.0-170-generic 3.13.0-170.220
linux-image-3.13.0-170-generic-lpae 3.13.0-170.220
linux-image-3.13.0-170-lowlatency 3.13.0-170.220
linux-image-3.13.0-170-powerpc-e500 3.13.0-170.220
linux-image-3.13.0-170-powerpc-e500mc 3.13.0-170.220
linux-image-3.13.0-170-powerpc-smp 3.13.0-170.220
linux-image-3.13.0-170-powerpc64-emb 3.13.0-170.220
linux-image-3.13.0-170-powerpc64-smp 3.13.0-170.220
linux-image-generic 3.13.0.170.181
linux-image-generic-lpae 3.13.0.170.181
linux-image-lowlatency 3.13.0.170.181
linux-image-powerpc-e500 3.13.0.170.181
linux-image-powerpc-e500mc 3.13.0.170.181
linux-image-powerpc-smp 3.13.0.170.181
linux-image-powerpc64-emb 3.13.0.170.181
linux-image-powerpc64-smp 3.13.0.170.181
linux-image-virtual 3.13.0.170.181

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3983-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

USN-3983-2: Linux kernel (Trusty HWE) vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3983-2
May 15, 2019

linux-lts-trusty vulnerabilities
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM

Details:

USN-3983-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 LTS.

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 12.04 ESM:
linux-image-3.13.0-170-generic 3.13.0-170.220~12.04.2+signed1
linux-image-3.13.0-170-generic-lpae 3.13.0-170.220~12.04.2
linux-image-3.13.0-170-lowlatency 3.13.0-170.220~12.04.2+signed1
linux-image-generic-lpae-lts-trusty 3.13.0.170.158
linux-image-generic-lts-trusty 3.13.0.170.158

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3983-2
https://usn.ubuntu.com/usn/usn-3983-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS


USN-3984-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3984-1
May 15, 2019

linux vulnerabilities
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

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 12.04 ESM:
linux-image-3.2.0-140-generic 3.2.0-140.186
linux-image-3.2.0-140-generic-pae 3.2.0-140.186
linux-image-3.2.0-140-highbank 3.2.0-140.186
linux-image-3.2.0-140-omap 3.2.0-140.186
linux-image-3.2.0-140-powerpc-smp 3.2.0-140.186
linux-image-3.2.0-140-powerpc64-smp 3.2.0-140.186
linux-image-3.2.0-140-virtual 3.2.0-140.186
linux-image-generic 3.2.0.140.155
linux-image-generic-pae 3.2.0.140.155
linux-image-highbank 3.2.0.140.155
linux-image-omap 3.2.0.140.155
linux-image-powerpc 3.2.0.140.155
linux-image-powerpc-smp 3.2.0.140.155
linux-image-powerpc64-smp 3.2.0.140.155
linux-image-virtual 3.2.0.140.155

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

Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3984-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS





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