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Ubuntu 14.04 LTS USN-3696-2 Critical: Kernel Issues and Threats

ubuntu
Calendar Grey July 2, 2018
Dist Ubuntu Esm H88
Essential revisions to Ubuntu's Linux kernel address numerous security flaws. Important details and steps outlined.
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-3696-1 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 LTS.

It was discovered that an integer overflow existed in the perf subsystem of

the Linux kernel. A local attacker could use this to cause a denial of

service (system crash). (CVE-2017-18255)

Wei Fang discovered an integer overflow in the F2FS filesystem

implementation in the Linux kernel. A local attacker could use this to

cause a denial of service. (CVE-2017-18257)

It was discovered that an information leak existed in the generic SCSI

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

sensitive information (kernel memory). (CVE...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak critical kernel issue ubuntu system crash

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-1024-aws      4.4.0-1024.25
  linux-image-4.4.0-130-generic   4.4.0-130.156~14.04.1
  linux-image-4.4.0-130-generic-lpae  4.4.0-130.156~14.04.1
  linux-image-4.4.0-130-lowlatency  4.4.0-130.156~14.04.1
  linux-image-4.4.0-130-powerpc-e500mc  4.4.0-130.156~14.04.1
  linux-image-4.4.0-130-powerpc-smp  4.4.0-130.156~14.04.1
  linux-image-4.4.0-130-powerpc64-emb  4.4.0-130.156~14.04.1
  linux-image-4.4.0-130-powerpc64-smp  4.4.0-130.156~14.04.1
  linux-image-aws                 4.4.0.1024.24
  linux-image-generic-lpae-lts-xenial  4.4.0.130.110
  linux-image-generic-lts-xenial  4.4.0.130.110
  linux-image-lowlatency-lts-xenial  4.4.0.130.110
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.130.110
  linux-image-powerpc-smp-lts-xenial  4.4.0.130.110
  linux-image-powerpc64-emb-lts-xenial  4.4.0.130.110
  linux-image-powerpc64-smp-lts-xenial  4.4.0.130.110

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-3696-2

https://ubuntu.com/security/notices/USN-3696-1

CVE-2017-13695, CVE-2017-18255, CVE-2017-18257, CVE-2018-1000204,

CVE-2018-10021, CVE-2018-10087, CVE-2018-10124, CVE-2018-3665,

CVE-2018-5814, CVE-2018-7755

Severity
critical
Lowest
Low
Medium
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Critical

July 02, 2018

Topics%20covered

Topics Covered

security advisory denial of service information leak critical kernel issue ubuntu system crash

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1024.25
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-130.156~14.04.1

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