[El-errata] New Ksplice updates for UEKR4 4.1.12 on OL6 and OL7 (ELSA-2021-9577)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2021-9577 can now be patched using Ksplice
CVEs: CVE-2021-3732

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2021-9577.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2021-9577.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR4 4.1.12 on
OL6 and OL7 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-2021-3732: Information disclosure in OverlayFS when mounting a 
filesystem.

A logic flaw in mounting functionality of OverlayFS subsystem could
allow an unprivileged local user with permissions to mount a filesystem
to access hidden files that should not be accessible in the original mount.
An unprivileged local attacker could use this flaw for information
disclosure.

Orabug: 33560431

SUPPORT

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