[Ksplice][Ubuntu-Oracle-Updates] New Ksplice updates for Ubuntu OCI kernel (USN-4711-1)

[Oracle Ksplice]

Synopsis: USN-4711-1 can now be patched using Ksplice
CVEs: CVE-2020-25704 CVE-2020-28374

Systems running Ubuntu OCI kernel can now use Ksplice to patch against
the latest Ubuntu Security Notice, USN-4711-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu OCI
kernel 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-2020-28374: Access control bypass when reading or writing TCM devices.

Lack of validation against the session's list when matching a Target Core
Mod (TCM) device during an eXtended COPY (XCOPY) operation leads to access
control bypass.  Attackers with access to one device could read and write
from/to other devices they should not have access to.


* CVE-2020-25704: Denial-of-service in the performance monitoring subsystem.

A possible memory leak when setting performance monitoring filter could lead to
kernel memory exhaustion. A local attacker could use this flaw to cause a
denial-of-service.

SUPPORT

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