[El-errata] New Ksplice updates for Oracle Enhanced RHCK 7 (ELSA-2020-2082)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2020-2082 can now be patched using Ksplice
CVEs: CVE-2017-18595 CVE-2019-19768 CVE-2020-10711

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2020-2082.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2020-2082.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Oracle Enhanced
RHCK 7 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-2017-18595: Use-after-free in kernel trace buffer allocation.

Incorrect error handling when allocating a kernel trace buffer could
result in a double free and kernel crash.  A local, privileged user
could use this flaw to trigger a denial of service.


* CVE-2019-19768: Use-after-free when reporting an IO trace.

Lack of correct synchronization between releasing a structure used to store
a trace and filling that structure coud lead to a use-after-free.  A local
user with the ability to enable tracing on the block IO sub-system could
use this flaw to cause a denial-of-service or potentially escalate
privileges.


* CVE-2020-10711: NULL pointer dereference when using CIPSO network packet labeling.

A logic error when receiving CIPSO network packets could lead to a NULL
pointer dereference. A remote attacker could use this flaw to cause a
denial-of-service.

SUPPORT

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