=========================================================================Ubuntu Security Notice USN-4579-1
October 14, 2020

linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2,
linux-snapdragon 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: 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 (V8) systems
- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

Hador Manor discovered that the DCCP protocol implementation in the Linux
kernel improperly handled socket reuse, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2020-16119)

Wen Xu discovered that the XFS file system in the Linux kernel did not
properly validate inode metadata in some situations. An attacker could use
this to construct a malicious XFS image that, when mounted, could cause a
denial of service (system crash). (CVE-2018-10322)

Jay Shin discovered that the ext4 file system implementation in the Linux
kernel did not properly handle directory access with broken indexing,
leading to an out-of-bounds read vulnerability. A local attacker could use
this to cause a denial of service (system crash). (CVE-2020-14314)

It was discovered that a race condition existed in the hugetlb sysctl
implementation in the Linux kernel. A privileged attacker could use this to
cause a denial of service (system crash). (CVE-2020-25285)

Update instructions:

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1082-kvm      4.4.0-1082.91
  linux-image-4.4.0-1117-aws      4.4.0-1117.131
  linux-image-4.4.0-1141-raspi2   4.4.0-1141.151
  linux-image-4.4.0-1145-snapdragon  4.4.0-1145.155
  linux-image-4.4.0-193-generic   4.4.0-193.224
  linux-image-4.4.0-193-generic-lpae  4.4.0-193.224
  linux-image-4.4.0-193-lowlatency  4.4.0-193.224
  linux-image-4.4.0-193-powerpc-e500mc  4.4.0-193.224
  linux-image-4.4.0-193-powerpc-smp  4.4.0-193.224
  linux-image-4.4.0-193-powerpc64-emb  4.4.0-193.224
  linux-image-4.4.0-193-powerpc64-smp  4.4.0-193.224
  linux-image-aws                 4.4.0.1117.122
  linux-image-generic             4.4.0.193.199
  linux-image-generic-lpae        4.4.0.193.199
  linux-image-kvm                 4.4.0.1082.80
  linux-image-lowlatency          4.4.0.193.199
  linux-image-powerpc-e500mc      4.4.0.193.199
  linux-image-powerpc-smp         4.4.0.193.199
  linux-image-powerpc64-emb       4.4.0.193.199
  linux-image-powerpc64-smp       4.4.0.193.199
  linux-image-raspi2              4.4.0.1141.141
  linux-image-snapdragon          4.4.0.1145.137
  linux-image-virtual             4.4.0.193.199

Ubuntu 14.04 ESM:
  linux-image-4.4.0-1081-aws      4.4.0-1081.85
  linux-image-4.4.0-193-generic   4.4.0-193.224~14.04.1
  linux-image-4.4.0-193-generic-lpae  4.4.0-193.224~14.04.1
  linux-image-4.4.0-193-lowlatency  4.4.0-193.224~14.04.1
  linux-image-aws                 4.4.0.1081.78
  linux-image-generic-lpae-lts-xenial  4.4.0.193.169
  linux-image-generic-lts-xenial  4.4.0.193.169
  linux-image-lowlatency-lts-xenial  4.4.0.193.169
  linux-image-virtual-lts-xenial  4.4.0.193.169

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://usn.ubuntu.com/4579-1
  CVE-2018-10322, CVE-2020-14314, CVE-2020-16119, CVE-2020-25285

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.4.0-193.224
  https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1117.131
  https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1082.91
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1141.151
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1145.155

Ubuntu 4579-1: Linux kernel vulnerabilities

October 13, 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 16.04 LTS: linux-image-4.4.0-1082-kvm 4.4.0-1082.91 linux-image-4.4.0-1117-aws 4.4.0-1117.131 linux-image-4.4.0-1141-raspi2 4.4.0-1141.151 linux-image-4.4.0-1145-snapdragon 4.4.0-1145.155 linux-image-4.4.0-193-generic 4.4.0-193.224 linux-image-4.4.0-193-generic-lpae 4.4.0-193.224 linux-image-4.4.0-193-lowlatency 4.4.0-193.224 linux-image-4.4.0-193-powerpc-e500mc 4.4.0-193.224 linux-image-4.4.0-193-powerpc-smp 4.4.0-193.224 linux-image-4.4.0-193-powerpc64-emb 4.4.0-193.224 linux-image-4.4.0-193-powerpc64-smp 4.4.0-193.224 linux-image-aws 4.4.0.1117.122 linux-image-generic 4.4.0.193.199 linux-image-generic-lpae 4.4.0.193.199 linux-image-kvm 4.4.0.1082.80 linux-image-lowlatency 4.4.0.193.199 linux-image-powerpc-e500mc 4.4.0.193.199 linux-image-powerpc-smp 4.4.0.193.199 linux-image-powerpc64-emb 4.4.0.193.199 linux-image-powerpc64-smp 4.4.0.193.199 linux-image-raspi2 4.4.0.1141.141 linux-image-snapdragon 4.4.0.1145.137 linux-image-virtual 4.4.0.193.199 Ubuntu 14.04 ESM: linux-image-4.4.0-1081-aws 4.4.0-1081.85 linux-image-4.4.0-193-generic 4.4.0-193.224~14.04.1 linux-image-4.4.0-193-generic-lpae 4.4.0-193.224~14.04.1 linux-image-4.4.0-193-lowlatency 4.4.0-193.224~14.04.1 linux-image-aws 4.4.0.1081.78 linux-image-generic-lpae-lts-xenial 4.4.0.193.169 linux-image-generic-lts-xenial 4.4.0.193.169 linux-image-lowlatency-lts-xenial 4.4.0.193.169 linux-image-virtual-lts-xenial 4.4.0.193.169 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://usn.ubuntu.com/4579-1

CVE-2018-10322, CVE-2020-14314, CVE-2020-16119, CVE-2020-25285

Severity
October 14, 2020

Package Information

https://launchpad.net/ubuntu/+source/linux/4.4.0-193.224 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1117.131 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1082.91 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1141.151 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1145.155