[Ksplice][Ubuntu-16.04-Updates] New Ksplice updates for Ubuntu 16.04 Xenial (USN-4627-1)

[Oracle Ksplice]

Synopsis: USN-4627-1 can now be patched using Ksplice
CVEs: CVE-2020-8694

Systems running Ubuntu 16.04 Xenial can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-4627-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu 16.04
Xenial 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

* CVE-2020-8694: Platypus Attack Mitigation.

A side-channel attack utilizing the Intel RAPL subsystem driver may
cause an information leak.  This may allow an unprivileged user to
view confidential data.


* Add ftrace safety guard for existing Ksplice updates.

Ftrace is generally incompatible with Ksplice's patching process; it must
be disabled when patches are applied. Prevent crashes in patching due to
functions under active ftrace while patching.


* Clean up ftrace safety guard for existing Ksplice updates.

Ftrace is generally incompatible with Ksplice's patching process; it must
be disabled when patches are applied. Prevent crashes in patching due to
functions under active ftrace while patching.

SUPPORT

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