linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities

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

  • 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-oem - Linux kernel for OEM processors
  • linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10902)

It was discovered that an integer overrun vulnerability existed in the POSIX timers implementation in the Linux kernel. A local attacker could use this to cause a denial of service. (CVE-2018-12896)

Noam Rathaus discovered that a use-after-free vulnerability existed in the Infiniband implementation in the Linux kernel. An attacker could use this to cause a denial of service (system crash). (CVE-2018-14734)

It was discovered that the YUREX USB device driver for the Linux kernel did not properly restrict user space reads or writes. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-16276)

It was discovered that the BPF verifier in the Linux kernel did not correctly compute numeric bounds in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-18445)

Kanda Motohiro discovered that writing extended attributes to an XFS file system in the Linux kernel in certain situations could cause an error condition to occur. A local attacker could use this to cause a denial of service. (CVE-2018-18690)

It was discovered that an integer overflow vulnerability existed in the CDROM driver of the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2018-18710)

Update instructions

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

Ubuntu 18.04 LTS
linux-image-4.15.0-1026-gcp - 4.15.0-1026.27
linux-image-4.15.0-1028-kvm - 4.15.0-1028.28
linux-image-4.15.0-1030-oem - 4.15.0-1030.35
linux-image-4.15.0-1030-raspi2 - 4.15.0-1030.32
linux-image-4.15.0-1031-aws - 4.15.0-1031.33
linux-image-4.15.0-1036-azure - 4.15.0-1036.38
linux-image-4.15.0-43-generic - 4.15.0-43.46
linux-image-4.15.0-43-generic-lpae - 4.15.0-43.46
linux-image-4.15.0-43-lowlatency - 4.15.0-43.46
linux-image-4.15.0-43-snapdragon - 4.15.0-43.46
linux-image-aws - 4.15.0.1031.30
linux-image-azure - 4.15.0.1036.36
linux-image-gcp - 4.15.0.1026.28
linux-image-generic - 4.15.0.43.45
linux-image-generic-lpae - 4.15.0.43.45
linux-image-gke - 4.15.0.1026.28
linux-image-kvm - 4.15.0.1028.28
linux-image-lowlatency - 4.15.0.43.45
linux-image-oem - 4.15.0.1030.35
linux-image-raspi2 - 4.15.0.1030.28
linux-image-snapdragon - 4.15.0.43.45

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


Read full article on Ubuntu Security