[Ksplice][EL6-Updates] New Ksplice updates for OL 6, RHEL 6, CentOS 6, and Scientific Linux 6 (RHSA-2017-0817)

[Oracle Ksplice]

Synopsis: RHSA-2017-0817 can now be patched using Ksplice
CVEs: CVE-2016-10088 CVE-2016-10142 CVE-2016-2069 CVE-2016-2384 CVE-2016-6480 CVE-2016-7042 CVE-2016-7097 CVE-2016-8399 CVE-2016-9576 CVE-2017-2636

Systems running RHCK on Oracle Linux 6, Red Hat Enterprise Linux 6,
CentOS 6, and Scientific Linux 6 can now use Ksplice to patch against
the latest Red Hat Security Advisory, RHSA-2017-0817.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running OL 6, RHEL 6,
CentOS 6, and Scientific Linux 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-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-2016-2069: 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-2016-6480: 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-2016-7042: 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-2016-8399: 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-2016-10142: Remote denial-of-service on ICMP Packet Too Big receival.

A flaw in the IPv6 protocol specification could allow a remote attacker to
trigger the use of fragmentation in arbitrary IPv6 streams by injecting
ICMP Packet Too Big (PTB) packets.  A remote attacker could use this flaw
to employ fragmentation based attacks and cause denial-of-service on the
IPv6 flow.


* 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.