[El-errata] New updates available via Ksplice (ELSA-2016-3567)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2016-3567 can now be patched using Ksplice
CVEs: CVE-2015-8215 CVE-2015-8324 CVE-2015-8543 CVE-2016-3157

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Security Advisory, ELSA-2016-3567.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack on EL 6 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-2016-3157: Xen I/O port access privilege escalation in x86-64.

User mode processes not supposed to be able to access I/O ports may
be granted such permission, potentially resulting in one or more of
in-guest privilege escalation, guest crashes (Denial of Service), or
in-guest information leaks.


* Denial-of-service in no-journal mode ext4 filesystems.

A user with physical access to a machine could use a carefully
constructed filesystem to hang the system.


* CVE-2015-8215: Remote denial-of-service of network traffic when changing the MTU.

Lack of validating the MTU in the IPv6 stack when it is reset could allow a
remote attacker to change the MTU through rogue router advertisement
packets.  A remote attacker could use this flaw to disrupt the system's
networking leading to high packet loss and denial-of-service.


* CVE-2015-8543: Denial-of-service on out of range protocol for raw sockets.

It was discovered that a local user permitted to create raw sockets could
cause a denial-of-service by specifying an invalid protocol number for the
socket.


* CVE-2015-8324: NULL pointer dereference in ext4 on mount error.

Some exit points in the ext4 filesystem on mount error could lead to the
destruction of a workqueue which is not yet initialized, leading to kernel
NULL pointer dereference and denial-of-service.

SUPPORT

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