[Ksplice][Ubuntu-18.04-Updates] New Ksplice updates for Ubuntu 18.04 Bionic (USN-3652-1)

[Oracle Ksplice]

Synopsis: USN-3652-1 can now be patched using Ksplice
CVEs: CVE-2018-3639

Systems running Ubuntu 18.04 Bionic can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-3652-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu 18.04
Bionic install these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* KPTI enablement for Ksplice.




* CVE-2018-3639: Speculative Store Bypass information leak.

A hardware sidechannel with speculative stores could allow a malicious,
unprivileged user to leak the contents of privileged memory.

This update enables the speculative store bypass mitigation by default
when supported microcode is loaded and can be manually enabled/disabled
by writing 1/0 to /proc/sys/vm/ksplice_ssbd_control.  The
/proc/sys/vm/ksplice_ssbd_status file reports the current mitigation
status.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.