Ubuntu 16.04 & 14.04: USN-4579-1 Critical: Linux Kernel Issues

ubuntu

October 13, 2020

Several security issues were fixed in the Linux kernel.

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 d...

Read the Full Advisory

Topics Covered

security advisory Ubuntu Denial of Service system crash linux kernel

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.