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Ubuntu 14.04 LTS USN-3820-3: Moderate Kernel Threats Resolved

ubuntu
Calendar Grey November 14, 2018
Dist Ubuntu Esm H88
Crucial news about vulnerabilities in Ubuntu 14.04 LTS kernel disclosed in November 2018. Significant security flaws have been resolved.
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:

Felix Wilhelm discovered that the Xen netback driver in the Linux kernel

did not properly perform input validation in some situations. An attacker

could use this to cause a denial of service (system crash) or possibly

execute arbitrary code. (CVE-2018-15471)

It was discovered that the generic SCSI driver in the Linux kernel did not

properly enforce permissions on kernel memory access. A local attacker

could use this to expose sensitive information or possibly elevate

privileges. (CVE-2017-13168)

It was discovered that an integer overflow existed in the CD-ROM driver of

the Linux kernel. A local attacker could use this to expose sensitive

information (kernel memory). (CVE-2018-16658)

It was discovered that an integer overflow existed in the HID Bluetooth

implementation in the Linux kernel that could lead to a buffer overwrite.

An ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code execution kernel information exposure ubuntu linux-azure

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.15.0-1031-azure   4.15.0-1031.32~14.04.1+signed1
  linux-image-azure               4.15.0.1031.18

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-3820-3

https://ubuntu.com/security/notices/USN-3820-1

CVE-2017-13168, CVE-2018-15471, CVE-2018-16658, CVE-2018-9363

November 14, 2018

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code execution kernel information exposure ubuntu linux-azure

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1031.32~14.04.1

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