[El-errata] New Ksplice updates for UEKR3 3.8.13 on OL6 and OL7 (ELSA-2019-4532)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2019-4532 can now be patched using Ksplice
CVEs: CVE-2017-18204 CVE-2018-1094 CVE-2018-14609 CVE-2018-17972

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2019-4532.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR3 3.8.13 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-2018-14609: NULL pointer dereference in BTRFS relocation cleanup.

A missing NULL pointer check could result in a kernel crash when
mounting a corrupted filesystem.  A user with the ability to mount
filesystems could use this flaw to crash the system with a maliciously
crafted image.

Orabug: 29301105


* CVE-2017-18204: Deadlock in OCFS2 when modifying attributes.

A lock ordering issue when modifying file attributes on the OCFS2
filesystem could in rare cases cause a deadlock and denial-of-service.

Orabug: 28852830


* CVE-2018-1094: NULL pointer dereference when filling extended attributes on ext4 filesystem.

A missing initialization of crypto driver used to fill extended
attributes on ext4 filesystem could lead to a NULL pointer dereference.
A local attacker could use this flaw to cause a denial-of-service.

Orabug: 28220451


* CVE-2018-17972: Information leak in kernel stack dumps in /proc.

A missing permissions check in the proc code could allow an unprivileged
user to access the kernel stack memory space.

Orabug: 29114878

SUPPORT

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