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Ubuntu 18.04 LTS: USN-3930-2 Critical Denial of Service Issues

ubuntu
Calendar Grey April 2, 2019
Dist Ubuntu Esm H88
Alert issued regarding security flaws in the Ubuntu kernel; crucial patches released to address potential threats.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

USN-3930-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10.

This update provides the corresponding updates for the Linux Hardware

Enablement (HWE) kernel from Ubuntu 18.10 for Ubuntu 18.04 LTS.

Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the

Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate

attacker could use this to cause a denial of service (system crash).

(CVE-2018-19824)

Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information

leak in the Bluetooth implementation of the Linux kernel. An attacker

within Bluetooth range could use this to expose sensitive information

(kernel memory). (CVE-2019-3459, CVE-2019-3460)

Jann Horn discovered that the KVM implementation in the Linux kernel

contained a use-a...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak Ubuntu kernel system update

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.18.0-1014-azure   4.18.0-1014.14~18.04.1
  linux-image-4.18.0-17-generic   4.18.0-17.18~18.04.1
  linux-image-4.18.0-17-generic-lpae  4.18.0-17.18~18.04.1
  linux-image-4.18.0-17-lowlatency  4.18.0-17.18~18.04.1
  linux-image-4.18.0-17-snapdragon  4.18.0-17.18~18.04.1
  linux-image-azure               4.18.0.1014.13
  linux-image-generic-hwe-18.04   4.18.0.17.67
  linux-image-generic-lpae-hwe-18.04  4.18.0.17.67
  linux-image-lowlatency-hwe-18.04  4.18.0.17.67
  linux-image-snapdragon-hwe-18.04  4.18.0.17.67
  linux-image-virtual-hwe-18.04   4.18.0.17.67

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://ubuntu.com/security/notices/USN-3930-2

https://ubuntu.com/security/notices/USN-3930-1

CVE-2018-19824, CVE-2019-3459, CVE-2019-3460, CVE-2019-6974,

CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912,

CVE-2019-8956, CVE-2019-8980, CVE-2019-9003, CVE-2019-9162,

CVE-2019-9213

Severity
critical
Lowest
Low
Medium
High
Critical

April 02, 2019

Topics%20covered

Topics Covered

security advisory denial of service information leak Ubuntu kernel system update

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1014.14~18.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.18.0-17.18~18.04.1

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