Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 454
Alerts This Week
Warning Icon 1 454

Ubuntu 14.04 LTS: USN-3741-3 Critical Kernel Update For Regresions

ubuntu
Calendar Grey August 17, 2018
Dist Ubuntu Esm H88
Significant vulnerabilities in the Linux core for Ubuntu 14.04 LTS patched via system upgrade; kernel crashes resolved.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

USN-3741-1 introduced mitigations in the Linux kernel for Ubuntu 14.04

LTS to address L1 Terminal Fault (L1TF) vulnerabilities (CVE-2018-3620,

CVE-2018-3646). Unfortunately, the update introduced regressions

that caused kernel panics when booting in some environments as well

as preventing Java applications from starting. This update fixes

the problems.

We apologize for the inconvenience.

Original advisory details:

It was discovered that memory present in the L1 data cache of an Intel CPU

core may be exposed to a malicious process that is executing on the CPU

core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local

attacker in a guest virtual machine could use this to expose sensitive

information (memory from other guests or the host OS). (CVE-2018-3646)

It was discovered that memory present in the L1 data cache of an Intel CPU

core may be exp...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical fix system update regressions kernel issues ubuntu 14.04

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-156-generic  3.13.0-156.206
  linux-image-3.13.0-156-generic-lpae  3.13.0-156.206
  linux-image-3.13.0-156-lowlatency  3.13.0-156.206
  linux-image-3.13.0-156-powerpc-e500  3.13.0-156.206
  linux-image-3.13.0-156-powerpc-e500mc  3.13.0-156.206
  linux-image-3.13.0-156-powerpc-smp  3.13.0-156.206
  linux-image-3.13.0-156-powerpc64-emb  3.13.0-156.206
  linux-image-3.13.0-156-powerpc64-smp  3.13.0-156.206
  linux-image-generic             3.13.0.156.166
  linux-image-generic-lpae        3.13.0.156.166
  linux-image-lowlatency          3.13.0.156.166
  linux-image-powerpc-e500        3.13.0.156.166
  linux-image-powerpc-e500mc      3.13.0.156.166
  linux-image-powerpc-smp         3.13.0.156.166
  linux-image-powerpc64-emb       3.13.0.156.166
  linux-image-powerpc64-smp       3.13.0.156.166

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-3741-3

https://ubuntu.com/security/notices/USN-3741-1

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1787127, https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1787258

Severity
critical
Lowest
Low
Medium
High
Critical

August 17, 2018

Topics%20covered

Topics Covered

security advisory denial of service critical fix system update regressions kernel issues ubuntu 14.04

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-156.206

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.