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Ubuntu 14.04 ESM: USN-4162-2 Critical Linux Kernel Denial of Service

ubuntu
Calendar Grey October 23, 2019
Dist Ubuntu Esm H88
Several vulnerabilities addressed in Ubuntu 14.04 ESM related to the Linux kernel cause severe denial of service risks.
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

Details:

USN-4162-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04

LTS. This update provides the corresponding updates for the Linux

kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 ESM.

It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not

did not handle detach operations correctly, leading to a use-after-free

vulnerability. A physically proximate attacker could use this to cause a

denial of service (system crash) or possibly execute arbitrary code.

(CVE-2018-21008)

Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux

kernel did not properly perform bounds checking, leading to a heap

overflow. A local attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2019-14814,

CVE-2019-14815, CVE-2019-14816)

Matt Delco discovered that...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update heap overflow use-after-free buffer overread linux-azure

Update Instructions

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

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1061-azure   4.15.0-1061.66~14.04.1
  linux-image-azure               4.15.0.1061.47

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-4162-2

https://ubuntu.com/security/notices/USN-4162-1

CVE-2018-21008, CVE-2019-14814, CVE-2019-14815, CVE-2019-14816,

CVE-2019-14821, CVE-2019-15117, CVE-2019-15118, CVE-2019-15505,

CVE-2019-15902, CVE-2019-15918

Severity
critical
Lowest
Low
Medium
High
Critical

October 23, 2019

Topics%20covered

Topics Covered

security advisory denial of service kernel update heap overflow use-after-free buffer overread linux-azure

Package Information

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