[El-errata] New Ksplice updates for UEKR4 4.1.12 on OL6 and OL7 (ELBA-2019-4314)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2019-4314 can now be patched using Ksplice
CVEs: CVE-2017-17450 CVE-2018-5848

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Bug Fix Advisory, ELBA-2019-4314.

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

* Kernel crash in Huge TLB mappings during page migration.

A race condition when migrating shared Huge TLB mappings or offlining a
huge page could result in memory corruption or a failing kernel
assertion resulting in a kernel crash.

Orabug: 28951854


* Kernel crash during Huge TLB page faults and truncation.

A race condition in Huge TLB page fault and truncation handling could
result in memory corruption or triggering a kernel assertion, leading to
a kernel crash.

Orabug: 28896255


* CVE-2017-17450: Unprivileged access to netlink namespaces.

A missing permission check in the netfilter xt_osf code allows an
unprivileged user to create user and net namespaces without the proper
permissions.

Orabug: 29037831


* CVE-2018-5848: Privilege escalation in the Wilocity Atheros driver.

Improper length validation could lead to integer overflow and undefined
behaviour.  A local user could use this flaw to cause a memory corruption
and potentially escalate privileges.

Orabug: 28951265


* NULL pointer dereference during iSCSI connection reset.

A missing check when resetting an iSCSI connection which is already terminating
can result in a NULL pointer dereference, leading to a kernel crash.

Orabug: 28946207


* Improved fix to Denial-of-service when hot-removing memory on missing sections.

A logic error in the routine checking the pages in a memory zone could lead
to a kernel crash when offlining memory.  A local, privileged user could
use this flaw to cause a denial-of-service.

Orabug: 29050538


* Denial-of-service when accessing valid_zones sysfs entry.

A logic error when reading valid_zones sysfs entry on a system with more
than 64GB of memory could lead to a kernel panic. A local attacker could
use this flaw to cause a denial-of-service.

Orabug: 29050538


* Address loss in ibacm during RDS failback.

Incorrect failover handling could result in confusion for ibacm when
performing failback.

Orabug: 28860366

SUPPORT

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