Ubuntu 16.04 LTS: USN-3696-1 Moderate: Denial of Service Threats

ubuntu

July 2, 2018

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 2

- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

It was discovered that an integer overflow existed in the perf subsystem of

the Linux kernel. A local attacker could use this to cause a denial of

service (system crash). (CVE-2017-18255)

Wei Fang discovered an integer overflow in the F2FS filesystem

implementation in the Linux kernel. A local attacker could use this to

cause a denial of service. (CVE-2017-18257)

It was discovered that an information leak existed in the generic SCSI

driver in the Linux kernel. A local attacker could use this to expose

sensitive information (kernel memory). (CVE-2018-1000204)

It was discovered that the wait4() system call in the Linux kernel did not

properly validate its ...

Read the Full Advisory

Topics Covered

security advisory denial of service information leak Ubuntu kernel system update integer overflow

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1029-kvm      4.4.0-1029.34
  linux-image-4.4.0-1062-aws      4.4.0-1062.71
  linux-image-4.4.0-1092-raspi2   4.4.0-1092.100
  linux-image-4.4.0-1095-snapdragon  4.4.0-1095.100
  linux-image-4.4.0-130-generic   4.4.0-130.156
  linux-image-4.4.0-130-generic-lpae  4.4.0-130.156
  linux-image-4.4.0-130-lowlatency  4.4.0-130.156
  linux-image-4.4.0-130-powerpc-e500mc  4.4.0-130.156
  linux-image-4.4.0-130-powerpc-smp  4.4.0-130.156
  linux-image-4.4.0-130-powerpc64-emb  4.4.0-130.156
  linux-image-4.4.0-130-powerpc64-smp  4.4.0-130.156
  linux-image-aws                 4.4.0.1062.64
  linux-image-generic             4.4.0.130.136
  linux-image-generic-lpae        4.4.0.130.136
  linux-image-kvm                 4.4.0.1029.28
  linux-image-lowlatency          4.4.0.130.136
  linux-image-powerpc-e500mc      4.4.0.130.136
  linux-image-powerpc-smp         4.4.0.130.136
  linux-image-powerpc64-emb       4.4.0.130.136
  linux-image-powerpc64-smp       4.4.0.130.136
  linux-image-raspi2              4.4.0.1092.92
  linux-image-snapdragon          4.4.0.1095.87

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.