firefox regressions

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

• Ubuntu 19.10
• Ubuntu 18.04 LTS

Summary

USN-4278-1 caused some minor regressions in Firefox.

Software Description

• firefox – Mozilla Open Source web browser

Details

USN-4278-1 fixed vulnerabilities in Firefox. The update introduced various
minor regressions. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Multiple security issues were discovered in Firefox. If a user were tricked
in to opening a specially crafted website, an attacker could potentially
exploit these to cause a denial of service, conduct cross-site scripting
(XSS) attacks, or execute arbitrary code.

Update instructions

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

Ubuntu 19.10

firefox – 73.0.1+build1-0ubuntu0.19.10.1

Ubuntu 18.04 LTS

firefox – 73.0.1+build1-0ubuntu0.18.04.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• USN-4278-1
• LP: 1864852

firefox vulnerabilities

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

• Ubuntu 16.04 LTS

Summary

Firefox could be made to crash or run programs as your login if it
opened a malicious website.

Software Description

• firefox – Mozilla Open Source web browser

Details

USN-4278-1 fixed vulnerabilities in Firefox. This update provides the
corresponding update for Ubuntu 16.04 LTS.

Original advisory details:

Multiple security issues were discovered in Firefox. If a user were tricked
in to opening a specially crafted website, an attacker could potentially
exploit these to cause a denial of service, conduct cross-site scripting
(XSS) attacks, or execute arbitrary code.

Update instructions

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

Ubuntu 16.04 LTS

firefox – 73.0.1+build1-0ubuntu0.16.04.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• USN-4278-1
• CVE-2020-6796
• CVE-2020-6798
• CVE-2020-6800
• CVE-2020-6801

rsync vulnerabilities

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

• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary

Several security issues were fixed in rsync.

Software Description

• rsync – fast, versatile, remote (and local) file-copying tool

Details

It was discovered that rsync incorrectly handled pointer arithmetic in zlib.
An attacker could use this issue to cause rsync to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2016-9840,
CVE-2016-9841)

It was discovered that rsync incorrectly handled vectors involving left shifts
of negative integers in zlib. An attacker could use this issue to cause rsync
to crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2016-9842)

It was discovered that rsync incorrectly handled vectors involving big-endian
CRC calculation in zlib. An attacker could use this issue to cause rsync to
crash, resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-9843)

Update instructions

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

Ubuntu 18.04 LTS

rsync – 3.1.2-2.1ubuntu1.1

Ubuntu 16.04 LTS

rsync – 3.1.1-3ubuntu1.3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2016-9840
• CVE-2016-9841
• CVE-2016-9842
• CVE-2016-9843

libapache2-mod-auth-mellon vulnerability

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

• Ubuntu 19.10
• Ubuntu 18.04 LTS

Summary

libapache2-mod-auth-mellon could be made to redirect users to malicious
sites.

Software Description

• libapache2-mod-auth-mellon – SAML 2.0 authentication module for Apache

Details

It was discovered that mod_auth_mellon incorrectly handled certain
requests. An attacker could possibly use this issue to redirect a user to a
malicious URL.

Update instructions

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

Ubuntu 19.10

libapache2-mod-auth-mellon – 0.14.2-1ubuntu1.19.10.1

Ubuntu 18.04 LTS

libapache2-mod-auth-mellon – 0.13.1-1ubuntu0.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2019-13038

libpam-radius-auth vulnerability

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

• Ubuntu 19.10
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary

libpam-radius-auth could be made to crash if it received specially crafted
network traffic.

Software Description

• libpam-radius-auth – The PAM RADIUS authentication module

Details

It was discovered that libpam-radius-auth incorrectly handled certain long
passwords. A remote attacker could possibly use this issue to cause
libpam-radius-auth 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 19.10

libpam-radius-auth – 1.3.17-0ubuntu5.19.10.1

Ubuntu 18.04 LTS

libpam-radius-auth – 1.3.17-0ubuntu5.18.04.1

Ubuntu 16.04 LTS

libpam-radius-auth – 1.3.17-0ubuntu4.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2015-9542

squid, squid3 vulnerabilities

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

• Ubuntu 19.10
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Squid.

Software Description

• squid – Web proxy cache server
• squid3 – Web proxy cache server

Details

Jeriko One discovered that Squid incorrectly handled memory when connected
to an FTP server. A remote attacker could possibly use this issue to obtain
sensitive information from Squid memory. (CVE-2019-12528)

Regis Leroy discovered that Squid incorrectly handled certain HTTP
requests. A remote attacker could possibly use this issue to access server
resources prohibited by earlier security filters. (CVE-2020-8449)

Guido Vranken discovered that Squid incorrectly handled certain buffer
operations when acting as a reverse proxy. A remote attacker could use
this issue to cause Squid to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2020-8450)

Aaron Costello discovered that Squid incorrectly handled certain NTLM
authentication credentials. A remote attacker could possibly use this issue
to cause Squid to crash, resulting in a denial of service. (CVE-2020-8517)

Update instructions

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

Ubuntu 19.10

squid – 4.8-1ubuntu2.2

Ubuntu 18.04 LTS

squid – 3.5.27-1ubuntu1.5

Ubuntu 16.04 LTS

squid – 3.5.12-1ubuntu7.10

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2019-12528
• CVE-2020-8449
• CVE-2020-8450
• CVE-2020-8517

ppp vulnerability

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

• Ubuntu 19.10
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary

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

Software Description

• ppp – Point-to-Point Protocol (PPP)

Details

It was discovered that ppp incorrectly handled certain rhostname values. A
remote attacker could use this issue to cause ppp to crash, resulting in a
denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 19.10

ppp – 2.4.7-2+4.1ubuntu4.1

Ubuntu 18.04 LTS

ppp – 2.4.7-2+2ubuntu1.2

Ubuntu 16.04 LTS

ppp – 2.4.7-1+2ubuntu1.16.04.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2020-8597

php7.0 regression

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

• Ubuntu 16.04 LTS

Summary

USN-4279-1 introduced a regression in PHP.

Software Description

• php7.0 – HTML-embedded scripting language interpreter

Details

USN-4279-1 fixed vulnerabilities in PHP. The updated packages caused a regression.
This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that PHP incorrectly handled certain scripts.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM and Ubuntu 16.04 LTS.
(CVE-2015-9253)

It was discovered that PHP incorrectly handled certain inputs. An attacker
could possibly use this issue to expose sensitive information.
(CVE-2020-7059)

It was discovered that PHP incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS
and Ubuntu 19.10. (CVE-2020-7060)

Update instructions

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

Ubuntu 16.04 LTS

libapache2-mod-php7.0 – 7.0.33-0ubuntu0.16.04.12

php7.0-cgi – 7.0.33-0ubuntu0.16.04.12

php7.0-cli – 7.0.33-0ubuntu0.16.04.12

php7.0-fpm – 7.0.33-0ubuntu0.16.04.12

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• USN-4279-1
• LP: 1863850

linux, linux-aws, linux-azure, linux-azure-5.3, linux-gcp, linux-gcp-5.3, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-raspi2-5.3 vulnerabilities

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

• Ubuntu 19.10
• 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-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-oracle – Linux kernel for Oracle Cloud systems
• linux-raspi2 – Linux kernel for Raspberry Pi 2
• linux-azure-5.3 – Linux kernel for Microsoft Azure Cloud systems
• linux-gcp-5.3 – Linux kernel for Google Cloud Platform (GCP) systems
• linux-hwe – Linux hardware enablement (HWE) kernel
• linux-raspi2-5.3 – Linux kernel for Raspberry Pi 2

Details

It was discovered that the Linux kernel did not properly clear data
structures on context switches for certain Intel graphics processors. A
local attacker could use this to expose sensitive information.
(CVE-2019-14615)

It was discovered that the Atheros 802.11ac wireless USB device driver in
the Linux kernel did not properly validate device metadata. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2019-15099)

It was discovered that the HSA Linux kernel driver for AMD GPU devices did
not properly check for errors in certain situations, leading to a NULL
pointer dereference. A local attacker could possibly use this to cause a
denial of service. (CVE-2019-16229)

It was discovered that the Marvell 8xxx Libertas WLAN device driver in the
Linux kernel did not properly check for errors in certain situations,
leading to a NULL pointer dereference. A local attacker could possibly use
this to cause a denial of service. (CVE-2019-16232)

It was discovered that a race condition existed in the Virtual Video Test
Driver in the Linux kernel. An attacker with write access to /dev/video0 on
a system with the vivid module loaded could possibly use this to gain
administrative privileges. (CVE-2019-18683)

It was discovered that the Renesas Digital Radio Interface (DRIF) driver in
the Linux kernel did not properly initialize data. A local attacker could
possibly use this to expose sensitive information (kernel memory).
(CVE-2019-18786)

It was discovered that the Sound Open Firmware (SOF) driver in the Linux
kernel did not properly deallocate memory in certain error conditions. A
local attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2019-18811)

It was discovered that the crypto subsystem in the Linux kernel did not
properly deallocate memory in certain error conditions. A local attacker
could use this to cause a denial of service (kernel memory exhaustion).
(CVE-2019-19050, CVE-2019-19062)

It was discovered that multiple memory leaks existed in the Marvell WiFi-Ex
Driver for the Linux kernel. A local attacker could possibly use this to
cause a denial of service (kernel memory exhaustion). (CVE-2019-19057)

It was discovered that the Realtek rtlwifi USB device driver in the Linux
kernel did not properly deallocate memory in certain error conditions. A
local attacker could possibly use this to cause a denial of service (kernel
memory exhaustion). (CVE-2019-19063)

It was discovered that the RSI 91x WLAN device driver in the Linux kernel
did not properly deallocate memory in certain error conditions. A local
attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2019-19071)

It was discovered that the Broadcom Netxtreme HCA device driver in the
Linux kernel did not properly deallocate memory in certain error
conditions. A local attacker could possibly use this to cause a denial of
service (kernel memory exhaustion). (CVE-2019-19077)

It was discovered that the Atheros 802.11ac wireless USB device driver in
the Linux kernel did not properly deallocate memory in certain error
conditions. A local attacker could possibly use this to cause a denial of
service (kernel memory exhaustion). (CVE-2019-19078)

It was discovered that the AMD GPU device drivers in the Linux kernel did
not properly deallocate memory in certain error conditions. A local
attacker could use this to possibly cause a denial of service (kernel
memory exhaustion). (CVE-2019-19082)

It was discovered that the IO uring implementation in the Linux kernel did
not properly perform credentials checks in certain situations. A local
attacker could possibly use this to gain administrative privileges.
(CVE-2019-19241)

Or Cohen discovered that the virtual console subsystem in the Linux kernel
did not properly restrict writes to unimplemented vcsu (unicode) devices. A
local attacker could possibly use this to cause a denial of service (system
crash) or have other unspecified impacts. (CVE-2019-19252)

It was discovered that the KVM hypervisor implementation in the Linux
kernel did not properly handle ioctl requests to get emulated CPUID
features. An attacker with access to /dev/kvm could use this to cause a
denial of service (system crash). (CVE-2019-19332)

It was discovered that a race condition existed in the Linux kernel on x86
platforms when keeping track of which process was assigned control of the
FPU. A local attacker could use this to cause a denial of service (memory
corruption) or possibly gain administrative privileges. (CVE-2019-19602)

It was discovered that the ext4 file system implementation in the Linux
kernel did not properly handle certain conditions. An attacker could use
this to specially craft an ext4 file system that, when mounted, could cause
a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2019-19767)

It was discovered that the Kvaser CAN/USB driver in the Linux kernel did
not properly initialize memory in certain situations. A local attacker
could possibly use this to expose sensitive information (kernel memory).
(CVE-2019-19947)

Gao Chuan discovered that the SAS Class driver in the Linux kernel
contained a race condition that could lead to a NULL pointer dereference. A
local attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-19965)

It was discovered that the B2C2 FlexCop USB device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2019-15291)

Update instructions

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

Ubuntu 19.10

linux-image-5.3.0-1009-oracle – 5.3.0-1009.10

linux-image-5.3.0-1010-kvm – 5.3.0-1010.11

linux-image-5.3.0-1011-aws – 5.3.0-1011.12

linux-image-5.3.0-1012-gcp – 5.3.0-1012.13

linux-image-5.3.0-1013-azure – 5.3.0-1013.14

linux-image-5.3.0-1018-raspi2 – 5.3.0-1018.20

linux-image-5.3.0-40-generic – 5.3.0-40.32

linux-image-5.3.0-40-generic-lpae – 5.3.0-40.32

linux-image-5.3.0-40-lowlatency – 5.3.0-40.32

linux-image-5.3.0-40-snapdragon – 5.3.0-40.32

linux-image-aws – 5.3.0.1011.13

linux-image-azure – 5.3.0.1013.31

linux-image-gcp – 5.3.0.1012.13

linux-image-generic – 5.3.0.40.34

linux-image-generic-lpae – 5.3.0.40.34

linux-image-gke – 5.3.0.1012.13

linux-image-kvm – 5.3.0.1010.12

linux-image-lowlatency – 5.3.0.40.34

linux-image-oracle – 5.3.0.1009.10

linux-image-raspi2 – 5.3.0.1018.15

linux-image-snapdragon – 5.3.0.40.34

linux-image-virtual – 5.3.0.40.34

Ubuntu 18.04 LTS

linux-image-5.3.0-1012-gcp – 5.3.0-1012.13~18.04.1

linux-image-5.3.0-1013-azure – 5.3.0-1013.14~18.04.1

linux-image-5.3.0-1018-raspi2 – 5.3.0-1018.20~18.04.1

linux-image-5.3.0-40-generic – 5.3.0-40.32~18.04.1

linux-image-5.3.0-40-generic-lpae – 5.3.0-40.32~18.04.1

linux-image-5.3.0-40-lowlatency – 5.3.0-40.32~18.04.1

linux-image-azure-edge – 5.3.0.1013.13

linux-image-gcp-edge – 5.3.0.1012.11

linux-image-generic-hwe-18.04 – 5.3.0.40.97

linux-image-generic-lpae-hwe-18.04 – 5.3.0.40.97

linux-image-lowlatency-hwe-18.04 – 5.3.0.40.97

linux-image-raspi2-hwe-18.04 – 5.3.0.1018.7

linux-image-snapdragon-hwe-18.04 – 5.3.0.40.97

linux-image-virtual-hwe-18.04 – 5.3.0.40.97

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

• CVE-2019-14615
• CVE-2019-15099
• CVE-2019-15291
• CVE-2019-16229
• CVE-2019-16232
• CVE-2019-18683
• CVE-2019-18786
• CVE-2019-18811
• CVE-2019-19050
• CVE-2019-19057
• CVE-2019-19062
• CVE-2019-19063
• CVE-2019-19071
• CVE-2019-19077
• CVE-2019-19078
• CVE-2019-19082
• CVE-2019-19241
• CVE-2019-19252
• CVE-2019-19332
• CVE-2019-19602
• CVE-2019-19767
• CVE-2019-19947
• CVE-2019-19965

linux-azure 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-azure – Linux kernel for Microsoft Azure Cloud systems

Details

USN-4287-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 ESM.

It was discovered that the Linux kernel did not properly clear data
structures on context switches for certain Intel graphics processors. A
local attacker could use this to expose sensitive information.
(CVE-2019-14615)

It was discovered that the Atheros 802.11ac wireless USB device driver in
the Linux kernel did not properly validate device metadata. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2019-15099)

It was discovered that the HSA Linux kernel driver for AMD GPU devices did
not properly check for errors in certain situations, leading to a NULL
pointer dereference. A local attacker could possibly use this to cause a
denial of service. (CVE-2019-16229)

It was discovered that the Marvell 8xxx Libertas WLAN device driver in the
Linux kernel did not properly check for errors in certain situations,
leading to a NULL pointer dereference. A local attacker could possibly use
this to cause a denial of service. (CVE-2019-16232)

It was discovered that a race condition existed in the Virtual Video Test
Driver in the Linux kernel. An attacker with write access to /dev/video0 on
a system with the vivid module loaded could possibly use this to gain
administrative privileges. (CVE-2019-18683)

It was discovered that the Renesas Digital Radio Interface (DRIF) driver in
the Linux kernel did not properly initialize data. A local attacker could
possibly use this to expose sensitive information (kernel memory).
(CVE-2019-18786)

It was discovered that the Afatech AF9005 DVB-T USB device driver in the
Linux kernel did not properly deallocate memory in certain error
conditions. A local attacker could possibly use this to cause a denial of
service (kernel memory exhaustion). (CVE-2019-18809)

It was discovered that the btrfs file system in the Linux kernel did not
properly validate metadata, leading to a NULL pointer dereference. An
attacker could use this to specially craft a file system image that, when
mounted, could cause a denial of service (system crash). (CVE-2019-18885)

It was discovered that multiple memory leaks existed in the Marvell WiFi-Ex
Driver for the Linux kernel. A local attacker could possibly use this to
cause a denial of service (kernel memory exhaustion). (CVE-2019-19057)

It was discovered that the crypto subsystem in the Linux kernel did not
properly deallocate memory in certain error conditions. A local attacker
could use this to cause a denial of service (kernel memory exhaustion).
(CVE-2019-19062)

It was discovered that the Realtek rtlwifi USB device driver in the Linux
kernel did not properly deallocate memory in certain error conditions. A
local attacker could possibly use this to cause a denial of service (kernel
memory exhaustion). (CVE-2019-19063)

It was discovered that the RSI 91x WLAN device driver in the Linux kernel
did not properly deallocate memory in certain error conditions. A local
attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2019-19071)

It was discovered that the Atheros 802.11ac wireless USB device driver in
the Linux kernel did not properly deallocate memory in certain error
conditions. A local attacker could possibly use this to cause a denial of
service (kernel memory exhaustion). (CVE-2019-19078)

It was discovered that the AMD GPU device drivers in the Linux kernel did
not properly deallocate memory in certain error conditions. A local
attacker could use this to possibly cause a denial of service (kernel
memory exhaustion). (CVE-2019-19082)

Dan Carpenter discovered that the AppleTalk networking subsystem of the
Linux kernel did not properly handle certain error conditions, leading to a
NULL pointer dereference. A local attacker could use this to cause a denial
of service (system crash). (CVE-2019-19227)

It was discovered that the KVM hypervisor implementation in the Linux
kernel did not properly handle ioctl requests to get emulated CPUID
features. An attacker with access to /dev/kvm could use this to cause a
denial of service (system crash). (CVE-2019-19332)

It was discovered that the ext4 file system implementation in the Linux
kernel did not properly handle certain conditions. An attacker could use
this to specially craft an ext4 file system that, when mounted, could cause
a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2019-19767)

Gao Chuan discovered that the SAS Class driver in the Linux kernel
contained a race condition that could lead to a NULL pointer dereference. A
local attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-19965)

It was discovered that the Datagram Congestion Control Protocol (DCCP)
implementation in the Linux kernel did not properly deallocate memory in
certain error conditions. An attacker could possibly use this to cause a
denial of service (kernel memory exhaustion). (CVE-2019-20096)

Mitchell Frank discovered that the Wi-Fi implementation in the Linux kernel
when used as an access point would send IAPP location updates for stations
before client authentication had completed. A physically proximate attacker
could use this to cause a denial of service. (CVE-2019-5108)

It was discovered that a race condition can lead to a use-after-free while
destroying GEM contexts in the i915 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-2020-7053)

It was discovered that the B2C2 FlexCop USB device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2019-15291)

Update instructions

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

Ubuntu 14.04 ESM

linux-image-4.15.0-1069-azure – 4.15.0-1069.74~14.04.1

linux-image-azure – 4.15.0.1069.55

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

• USN-4287-1
• CVE-2019-14615
• CVE-2019-15099
• CVE-2019-15291
• CVE-2019-16229
• CVE-2019-16232
• CVE-2019-18683
• CVE-2019-18786
• CVE-2019-18809
• CVE-2019-18885
• CVE-2019-19057
• CVE-2019-19062
• CVE-2019-19063
• CVE-2019-19071
• CVE-2019-19078
• CVE-2019-19082
• CVE-2019-19227
• CVE-2019-19332
• CVE-2019-19767
• CVE-2019-19965
• CVE-2019-20096
• CVE-2019-5108
• CVE-2020-7053