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Ubuntu: 4008-3 Critical: Linux Kernel DoS and ASLR Issues

ubuntu
Calendar Grey June 7, 2019
Dist Ubuntu Esm H88
Critical patch release for Ubuntu kernel flaws on June 07, 2019, mitigating local exploitation threats through updates and corrective measures.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-4008-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04

LTS. This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu

14.04 ESM.

Robert Święcki discovered that the Linux kernel did not properly apply

Address Space Layout Randomization (ASLR) in some situations for setuid elf

binaries. A local attacker could use this to improve the chances of

exploiting an existing vulnerability in a setuid elf binary.

(CVE-2019-11190)

It was discovered that a null pointer dereference vulnerability existed in

the LSI Logic MegaRAID driver in the Linux kernel. A local attacker could

use this to cause a denial of service (system crash). (CVE-2019-11810)

It was disc...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel local attacker address space layout randomization Linux AWS

Update Instructions

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

Ubuntu 14.04 ESM:
  linux-image-4.4.0-1045-aws      4.4.0-1045.48
  linux-image-4.4.0-150-generic   4.4.0-150.176~14.04.1
  linux-image-4.4.0-150-generic-lpae  4.4.0-150.176~14.04.1
  linux-image-4.4.0-150-lowlatency  4.4.0-150.176~14.04.1
  linux-image-aws                 4.4.0.1045.46
  linux-image-generic-lpae-lts-xenial  4.4.0.150.132
  linux-image-generic-lts-xenial  4.4.0.150.132
  linux-image-lowlatency-lts-xenial  4.4.0.150.132

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-4008-3

https://ubuntu.com/security/notices/USN-4008-1

CVE-2019-11190, CVE-2019-11191, CVE-2019-11810, CVE-2019-11815

Severity
critical
Lowest
Low
Medium
High
Critical

June 07, 2019

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel local attacker address space layout randomization Linux AWS

Package Information

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