[Ksplice][Virtuozzo 4.7 Updates] New Ksplice updates for Virtuozzo 4.7 or OpenVZ on RHEL 6 (2.6.32-042stab120.20)

[Oracle Ksplice]

Synopsis: 2.6.32-042stab120.20 can now be patched using Ksplice
CVEs: CVE-2017-2636 CVE-2017-2647 CVE-2017-6074

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, 2.6.32-042stab120.20.

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-2017-2636: Privilege escalation in High Level Data Synchronous TTY line discipline.

A race condition when flushing the transmit queue concurently to sending
frames in the HDLC TTY line discipline could lead to a double free.  A
local, unprivileged user could use this flaw to elevate his privileges.


* CVE-2017-6074: Denial-of-service when using IPV6_RECVPKTINFO socket option.

A logic error when using IPV6_RECVPKTINFO socket option could lead to a
use-after-free. A local user could use this flaw to cause a
denial-of-service.


* CVE-2017-2647: Denial-of-service when invoking request_key() syscall.

A missing check in request_key() syscall could lead to a NULL pointer
dereference. A local unprivileged user could use this flaw to cause a
denial-of-service.

SUPPORT

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