[Ksplice][Ubuntu-16.04-Updates] New Ksplice updates for Ubuntu 16.04 Xenial (USN-4708-1)

[Oracle Ksplice]

Synopsis: USN-4708-1 can now be patched using Ksplice
CVEs: CVE-2018-13093 CVE-2019-19813 CVE-2019-19816

Systems running Ubuntu 16.04 Xenial can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-4708-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu 16.04
Xenial 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-2018-13093: NULL-pointer dereference when reusing inodes in xfs.

If an XFS filesystem becomes corrupted, the local inode cache might
attempt to re-allocate in-use inodes. This can result in a deadlock or
NULL-pointer dereference and denial-of-service.


* CVE-2019-19813, CVE-2019-19816: Invalid memory accesses during btrfs filesystem sync.

A failure to properly validate certain metadata in a btrfs filesystem
image can lead to out-of-bounds writes and use-after-free issues.  Using
a specially crafted btrfs image, a local attacker could potentially
exploit these flaws to escalate privilege or cause other unexpected
behavior, including a denial-of-service.

SUPPORT

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