[Ksplice][EL8-Updates] New Ksplice updates for OL 8 and RHEL 8 (ELSA-2021-4647)

[Oracle Ksplice]

Synopsis: ELSA-2021-4647 can now be patched using Ksplice
CVEs: CVE-2021-20317 CVE-2021-43267

Systems running RHCK on Oracle Linux 8 and Red Hat Enterprise Linux 8
can now use Ksplice to patch against the latest Red Hat kernel update,
ELSA-2021-4647.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2021-4647.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running OL 8 and RHEL 8
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-2021-43267: Arbitrary code execution when decoding TIPC MSG_CRYPTO packet.

Missing validation of the length of a MSG_CRYPTO TIPC message type could
allow a malicious sender to overwrite memory, potentially executing
arbitrary code.


* Note: Oracle will not provide a zero-downtime update for CVE-2021-20317.

CVE-2021-20317 is a flaw in the timerqueue system that could allow a
malicious privileged user to cause a denial-of-service and has been
assigned a 4.4 CVSS score. Oracle has determined that creating a
rebootless update for this issue would not be safe and recommends
rebooting to avoid the update.

SUPPORT

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