=========================================================================Ubuntu Security Notice USN-4591-1
October 19, 2020

linux, linux-hwe, linux-hwe-5.4, linux-oem, linux-raspi, linux-raspi-5.4,
linux-snapdragon vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-raspi: Linux kernel for Raspberry Pi (V8) systems
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-oem: Linux kernel for OEM systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi (V8) systems
- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

Andy Nguyen discovered that the Bluetooth L2CAP implementation in the Linux
kernel contained a type-confusion error. A physically proximate remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2020-12351)

Andy Nguyen discovered that the Bluetooth A2MP implementation in the Linux
kernel did not properly initialize memory in some situations. A physically
proximate remote attacker could use this to expose sensitive information
(kernel memory). (CVE-2020-12352)

Update instructions:

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1022-raspi    5.4.0-1022.25
  linux-image-5.4.0-52-generic    5.4.0-52.57
  linux-image-5.4.0-52-generic-lpae  5.4.0-52.57
  linux-image-5.4.0-52-lowlatency  5.4.0-52.57
  linux-image-generic             5.4.0.52.55
  linux-image-generic-hwe-18.04   5.4.0.52.55
  linux-image-generic-hwe-18.04-edge  5.4.0.52.55
  linux-image-generic-hwe-20.04   5.4.0.52.55
  linux-image-generic-lpae        5.4.0.52.55
  linux-image-generic-lpae-hwe-18.04  5.4.0.52.55
  linux-image-generic-lpae-hwe-18.04-edge  5.4.0.52.55
  linux-image-generic-lpae-hwe-20.04  5.4.0.52.55
  linux-image-lowlatency          5.4.0.52.55
  linux-image-lowlatency-hwe-18.04  5.4.0.52.55
  linux-image-lowlatency-hwe-18.04-edge  5.4.0.52.55
  linux-image-lowlatency-hwe-20.04  5.4.0.52.55
  linux-image-oem                 5.4.0.52.55
  linux-image-oem-osp1            5.4.0.52.55
  linux-image-raspi               5.4.0.1022.57
  linux-image-raspi-hwe-18.04     5.4.0.1022.57
  linux-image-raspi-hwe-18.04-edge  5.4.0.1022.57
  linux-image-raspi2              5.4.0.1022.57
  linux-image-raspi2-hwe-18.04    5.4.0.1022.57
  linux-image-raspi2-hwe-18.04-edge  5.4.0.1022.57
  linux-image-virtual             5.4.0.52.55
  linux-image-virtual-hwe-18.04   5.4.0.52.55
  linux-image-virtual-hwe-18.04-edge  5.4.0.52.55
  linux-image-virtual-hwe-20.04   5.4.0.52.55

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1090-snapdragon  4.15.0-1090.99
  linux-image-4.15.0-1100-oem     4.15.0-1100.110
  linux-image-4.15.0-122-generic  4.15.0-122.124
  linux-image-4.15.0-122-generic-lpae  4.15.0-122.124
  linux-image-4.15.0-122-lowlatency  4.15.0-122.124
  linux-image-5.4.0-1022-raspi    5.4.0-1022.25~18.04.1
  linux-image-5.4.0-52-generic    5.4.0-52.57~18.04.1
  linux-image-5.4.0-52-generic-lpae  5.4.0-52.57~18.04.1
  linux-image-5.4.0-52-lowlatency  5.4.0-52.57~18.04.1
  linux-image-generic             4.15.0.122.109
  linux-image-generic-hwe-18.04   5.4.0.52.57~18.04.46
  linux-image-generic-lpae        4.15.0.122.109
  linux-image-generic-lpae-hwe-18.04  5.4.0.52.57~18.04.46
  linux-image-lowlatency          4.15.0.122.109
  linux-image-lowlatency-hwe-18.04  5.4.0.52.57~18.04.46
  linux-image-oem                 4.15.0.1100.104
  linux-image-powerpc-e500mc      4.15.0.122.109
  linux-image-powerpc-smp         4.15.0.122.109
  linux-image-powerpc64-emb       4.15.0.122.109
  linux-image-powerpc64-smp       4.15.0.122.109
  linux-image-raspi-hwe-18.04     5.4.0.1022.26
  linux-image-snapdragon          4.15.0.1090.93
  linux-image-snapdragon-hwe-18.04  5.4.0.52.57~18.04.46
  linux-image-virtual             4.15.0.122.109
  linux-image-virtual-hwe-18.04   5.4.0.52.57~18.04.46

Ubuntu 16.04 LTS:
  linux-image-4.15.0-122-generic  4.15.0-122.124~16.04.1
  linux-image-4.15.0-122-generic-lpae  4.15.0-122.124~16.04.1
  linux-image-4.15.0-122-lowlatency  4.15.0-122.124~16.04.1
  linux-image-generic-hwe-16.04   4.15.0.122.122
  linux-image-generic-hwe-16.04-edge  4.15.0.122.122
  linux-image-generic-lpae-hwe-16.04  4.15.0.122.122
  linux-image-generic-lpae-hwe-16.04-edge  4.15.0.122.122
  linux-image-lowlatency-hwe-16.04  4.15.0.122.122
  linux-image-lowlatency-hwe-16.04-edge  4.15.0.122.122
  linux-image-oem                 4.15.0.122.122
  linux-image-virtual-hwe-16.04   4.15.0.122.122
  linux-image-virtual-hwe-16.04-edge  4.15.0.122.122

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:
  https://ubuntu.com/security/notices/USN-4591-1
  CVE-2020-12351, CVE-2020-12352

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.4.0-52.57
  https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1022.25
  https://launchpad.net/ubuntu/+source/linux/4.15.0-122.124
  https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-52.57~18.04.1
  https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1100.110
  https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1022.25~18.04.1
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1090.99
  https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-122.124~16.04.1

Ubuntu 4591-1: Linux kernel vulnerabilities

October 19, 2020
Several security issues were fixed in the Linux kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1022-raspi 5.4.0-1022.25 linux-image-5.4.0-52-generic 5.4.0-52.57 linux-image-5.4.0-52-generic-lpae 5.4.0-52.57 linux-image-5.4.0-52-lowlatency 5.4.0-52.57 linux-image-generic 5.4.0.52.55 linux-image-generic-hwe-18.04 5.4.0.52.55 linux-image-generic-hwe-18.04-edge 5.4.0.52.55 linux-image-generic-hwe-20.04 5.4.0.52.55 linux-image-generic-lpae 5.4.0.52.55 linux-image-generic-lpae-hwe-18.04 5.4.0.52.55 linux-image-generic-lpae-hwe-18.04-edge 5.4.0.52.55 linux-image-generic-lpae-hwe-20.04 5.4.0.52.55 linux-image-lowlatency 5.4.0.52.55 linux-image-lowlatency-hwe-18.04 5.4.0.52.55 linux-image-lowlatency-hwe-18.04-edge 5.4.0.52.55 linux-image-lowlatency-hwe-20.04 5.4.0.52.55 linux-image-oem 5.4.0.52.55 linux-image-oem-osp1 5.4.0.52.55 linux-image-raspi 5.4.0.1022.57 linux-image-raspi-hwe-18.04 5.4.0.1022.57 linux-image-raspi-hwe-18.04-edge 5.4.0.1022.57 linux-image-raspi2 5.4.0.1022.57 linux-image-raspi2-hwe-18.04 5.4.0.1022.57 linux-image-raspi2-hwe-18.04-edge 5.4.0.1022.57 linux-image-virtual 5.4.0.52.55 linux-image-virtual-hwe-18.04 5.4.0.52.55 linux-image-virtual-hwe-18.04-edge 5.4.0.52.55 linux-image-virtual-hwe-20.04 5.4.0.52.55 Ubuntu 18.04 LTS: linux-image-4.15.0-1090-snapdragon 4.15.0-1090.99 linux-image-4.15.0-1100-oem 4.15.0-1100.110 linux-image-4.15.0-122-generic 4.15.0-122.124 linux-image-4.15.0-122-generic-lpae 4.15.0-122.124 linux-image-4.15.0-122-lowlatency 4.15.0-122.124 linux-image-5.4.0-1022-raspi 5.4.0-1022.25~18.04.1 linux-image-5.4.0-52-generic 5.4.0-52.57~18.04.1 linux-image-5.4.0-52-generic-lpae 5.4.0-52.57~18.04.1 linux-image-5.4.0-52-lowlatency 5.4.0-52.57~18.04.1 linux-image-generic 4.15.0.122.109 linux-image-generic-hwe-18.04 5.4.0.52.57~18.04.46 linux-image-generic-lpae 4.15.0.122.109 linux-image-generic-lpae-hwe-18.04 5.4.0.52.57~18.04.46 linux-image-lowlatency 4.15.0.122.109 linux-image-lowlatency-hwe-18.04 5.4.0.52.57~18.04.46 linux-image-oem 4.15.0.1100.104 linux-image-powerpc-e500mc 4.15.0.122.109 linux-image-powerpc-smp 4.15.0.122.109 linux-image-powerpc64-emb 4.15.0.122.109 linux-image-powerpc64-smp 4.15.0.122.109 linux-image-raspi-hwe-18.04 5.4.0.1022.26 linux-image-snapdragon 4.15.0.1090.93 linux-image-snapdragon-hwe-18.04 5.4.0.52.57~18.04.46 linux-image-virtual 4.15.0.122.109 linux-image-virtual-hwe-18.04 5.4.0.52.57~18.04.46 Ubuntu 16.04 LTS: linux-image-4.15.0-122-generic 4.15.0-122.124~16.04.1 linux-image-4.15.0-122-generic-lpae 4.15.0-122.124~16.04.1 linux-image-4.15.0-122-lowlatency 4.15.0-122.124~16.04.1 linux-image-generic-hwe-16.04 4.15.0.122.122 linux-image-generic-hwe-16.04-edge 4.15.0.122.122 linux-image-generic-lpae-hwe-16.04 4.15.0.122.122 linux-image-generic-lpae-hwe-16.04-edge 4.15.0.122.122 linux-image-lowlatency-hwe-16.04 4.15.0.122.122 linux-image-lowlatency-hwe-16.04-edge 4.15.0.122.122 linux-image-oem 4.15.0.122.122 linux-image-virtual-hwe-16.04 4.15.0.122.122 linux-image-virtual-hwe-16.04-edge 4.15.0.122.122 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

https://ubuntu.com/security/notices/USN-4591-1

CVE-2020-12351, CVE-2020-12352

Severity
October 19, 2020

Package Information

https://launchpad.net/ubuntu/+source/linux/5.4.0-52.57 https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1022.25 https://launchpad.net/ubuntu/+source/linux/4.15.0-122.124 https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-52.57~18.04.1 https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1100.110 https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1022.25~18.04.1 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1090.99 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-122.124~16.04.1

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