[El-errata] New Ksplice updates for Oracle Enhanced RHCK 7 (ELBA-2019-0512-1)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2019-0512-1 can now be patched using Ksplice
CVEs: CVE-2018-17972 CVE-2018-18445 CVE-2018-9568

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Bug Fix Advisory, ELBA-2019-0512-1.

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-2018-18445: Out-of-bounds access in BPF verifier.

An incorrect truncation when using 32-bit ALU operations in the BPF verifier
can result in an out-of-bounds memory access, leading to a kernel crash. A
local user with the ability to create BPF programs could use this flaw to cause
a denial-of-service.


* CVE-2018-9568: Memory corruption in IPv6 to IPv4 socket cloning.

A logic error when transforming an IPv6 socket to an IPv4 socket can
result in releasing memory into the wrong cache. This flaw can result in
memory corruption.


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

A failure to restrict accessing /proc/self/task/*/stack to only
root could allow an unprivileged user to get information about the
stack and its contents on another process.

SUPPORT

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