[Ksplice][Virtuozzo 4.7 Updates] New Ksplice updates for Virtuozzo 4.7 or OpenVZ on RHEL 6 (2.6.32-042stab120.11)

[Oracle Ksplice]

Synopsis: 2.6.32-042stab120.11 can now be patched using Ksplice
CVEs: CVE-2016-1583 CVE-2016-7910 CVE-2016-7911

Systems running Virtuozzo 4.7 or the OpenVZ RHEL 6 kernel can now use
Ksplice to patch against the latest Parallels Virtuozzo Containers 4.7
kernel security update, 2.6.32-042stab120.11.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Virtuozzo 4.7
or OpenVZ on RHEL 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-2016-1583: Privilege escalation in eCryptfs.

eCryptfs was incorrectly trying to use the mmap() file operation on lower
filesystem that may not support it.  A local, unprivileged user could use
this flaw to cause a denial-of-service through recursive faults or
potentially escalate privileges.


* Denial-of-service when sending a TCP reset from the netfilter.

A failure to reset a socket buffer when building a TCP reset packet in the
netfilter leads to a kernel crash.  Depending on the configuration, a
remote attacker could use this flaw to cause a denial-of-service.


* CVE-2016-7910: Privilege escalation in /proc/partitions.

Incorrect cleanup when finishing reading /proc/partitions could result
in a use-after-free condition.  A local, unprivileged user could use
this flaw to crash the system, or potentially, escalate privileges.


* CVE-2016-7911: Privilege escalation in ioprio_get().

A race condition in retrieving the task IO context in the ioprio_get()
system call could allow a local, unprivileged user to trigger a
use-after-free and cause a denial-of-service, or potentially, escalate
privileges.

SUPPORT

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