USN-4228-1: Linux kernel vulnerabilities

7 January 2020

linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities

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

  • Ubuntu 16.04 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-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 a heap-based buffer overflow existed in the Marvell WiFi-Ex Driver for the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-14895, CVE-2019-14901)

It was discovered that a heap-based buffer overflow existed in the Marvell Libertas WLAN Driver for the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-14896, CVE-2019-14897)

Anthony Steinhauser discovered that the Linux kernel did not properly perform Spectre_RSB mitigations to all processors for PowerPC architecture systems in some situations. A local attacker could use this to expose sensitive information. (CVE-2019-18660)

It was discovered that Geschwister Schneider USB CAN interface driver in the Linux kernel did not properly deallocate memory in certain failure conditions. A physically proximate attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19052)

It was discovered that the driver for memoryless force-feedback input devices in the Linux kernel contained a use-after-free vulnerability. A physically proximate attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2019-19524)

It was discovered that the PEAK-System Technik USB driver in the Linux kernel did not properly sanitize memory before sending it to the device. A physically proximate attacker could use this to expose sensitive information (kernel memory). (CVE-2019-19534)

Update instructions

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

Ubuntu 16.04 LTS
linux-image-4.4.0-1064-kvm - 4.4.0-1064.71
linux-image-4.4.0-1100-aws - 4.4.0-1100.111
linux-image-4.4.0-1127-raspi2 - 4.4.0-1127.136
linux-image-4.4.0-1131-snapdragon - 4.4.0-1131.139
linux-image-4.4.0-171-generic - 4.4.0-171.200
linux-image-4.4.0-171-generic-lpae - 4.4.0-171.200
linux-image-4.4.0-171-lowlatency - 4.4.0-171.200
linux-image-4.4.0-171-powerpc-e500mc - 4.4.0-171.200
linux-image-4.4.0-171-powerpc-smp - 4.4.0-171.200
linux-image-4.4.0-171-powerpc64-emb - 4.4.0-171.200
linux-image-4.4.0-171-powerpc64-smp - 4.4.0-171.200
linux-image-aws - 4.4.0.1100.104
linux-image-generic - 4.4.0.171.179
linux-image-generic-lpae - 4.4.0.171.179
linux-image-kvm - 4.4.0.1064.64
linux-image-lowlatency - 4.4.0.171.179
linux-image-powerpc-e500mc - 4.4.0.171.179
linux-image-powerpc-smp - 4.4.0.171.179
linux-image-powerpc64-emb - 4.4.0.171.179
linux-image-powerpc64-smp - 4.4.0.171.179
linux-image-raspi2 - 4.4.0.1127.127
linux-image-snapdragon - 4.4.0.1131.123
linux-image-virtual - 4.4.0.171.179

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