[Ksplice][Virtuozzo 4.7 Updates] New Ksplice updates for Virtuozzo 4.7 or OpenVZ on RHEL 6 (2.6.32-042stab123.1)

[Oracle Ksplice]

Synopsis: 2.6.32-042stab123.1 can now be patched using Ksplice
CVEs: CVE-2016-0742 CVE-2016-10088 CVE-2016-10142 CVE-2016-2069 CVE-2016-2384 CVE-2016-6136 CVE-2016-6480 CVE-2016-7097 CVE-2016-8399 CVE-2016-9555 CVE-2016-9576 CVE-2017-6214

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, 2.6.32-042stab123.1.

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-2017-6214: Denial-of-service when splicing from TCP socket.

A specially crafted packet can be queued to trigger an infinite loop in
IPv4 subsystem. This can be exploited by an remote attacker to cause
denial-of-service.


* CVE-2016-10088, CVE-2016-9576: Use-after-free in SCSI device interface.

Incorrect validation of sendfile arguments can cause a use-after-free in
the SCSI subsystem. A local user with access to /dev/sg* devices could
use this flaw to read kernel memory or escalate privileges.


* CVE-2016-9555: Remote denial-of-service due to SCTP state machine memory corruption.

A missing bound-check in one of the state functions caused memory use
beyond what has been allocated. This could lead to memory corruption and
other undefined behaviors.


* CVE-2016-8399: Information leak using ICMP protocol.

A missing check on ICMP header length could cause an out-of-bounds read
of stack. A user could use this flaw to leak information about
kernel memory and facilitate an attack.


* CVE-2016-0742: Stack corruption when reading keys from proc filesystem.

An on-stack buffer is not big enough to hold the data being written to it
when reading keys from the proc filesystem, potentially leading to a kernel
panic when the stack protector is in use.  A local, unprivileged user could
use this flaw to cause a denial-of-service.


* CVE-2016-6480: Denial-of-service in Adaptec AACRAID driver.

A race condition in fetching parameters from userspace could result in
accessing beyond the bounds of a buffer.  A local user with privileges
to access the device could use this flaw to crash the system.


* CVE-2016-2069: Race condition in the TLB flush logic on multi-processors.

A race condition in the TLB flush logic when modifying paging structures
could lead to stale entries in the local TLB after switching to a new
process.  A local attacker could use this flaw to cause a denial-of-service
or potentially escalate privileges.


* CVE-2016-2384: Privilege escalation in USB MIDI device driver.

The USB MIDI device driver does not correctly free memory when failing
to initialize an endpoint which can cause a use-after-free condition. A
local unprivileged user can use this flaw to trigger kernel code
execution.


* CVE-2016-10142: Denial of service when routing IPv6 atomic fragments.

The kernel IPv6 implementation processes atomic fragments according to
the IPv6 RFC. However, remote attackers can leverage a feature of
atomic fragments to stop the routing of IPv6 traffic, causing a denial
of service.


* CVE-2016-6136: Audit log message spoofing.

A race condition when copying parameters from user-space could allow a
malicious user to spoof log messages in the audit subsystem, to
misrepresent commands or potentially evade logging.


* CVE-2016-7097: Privilege escalation when setting xattr.

A missing clear of SGID bit during a setxattr call could allow a local
user to gain group privileges.

SUPPORT

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