[Ksplice][EL8-Updates] New Ksplice updates for OL 8 and RHEL 8 (RHSA-2020:2427)

[Gregory Herrero]

Synopsis: RHSA-2020:2427 can now be patched using Ksplice
CVEs: CVE-2020-0543 CVE-2020-12657

Systems running RHCK on Oracle Linux 8 and Red Hat Enterprise Linux 8
can now use Ksplice to patch against the latest Red Hat Security
Advisory, RHSA-2020:2427.

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-2020-12657: Use-after-free in BFD I/O scheduler subsystem.

A race condition in the BFD I/O scheduler subsystem when clearing queue
leads to a use-after-free bug. An attacker may exploit this bug to cause
a denial-of-service.


* CVE-2020-0543: Side-channel information leak using SRBDS.

A side-channel information leak on some generations of Intel processors
could allow the leaking of internal microarchitectural buffers used by
instructions like RDRAND, RDSEED and SGX EGETKEY.

Updated microcode is required for this vulnerability to be mitigated.

The status of the mitigation can be found using the following command:
$ cat /sys/devices/system/cpu/vulnerabilities/srbds

SUPPORT

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